CA2056176C - Feedback system for load bearing surface - Google Patents
Feedback system for load bearing surface Download PDFInfo
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- CA2056176C CA2056176C CA002056176A CA2056176A CA2056176C CA 2056176 C CA2056176 C CA 2056176C CA 002056176 A CA002056176 A CA 002056176A CA 2056176 A CA2056176 A CA 2056176A CA 2056176 C CA2056176 C CA 2056176C
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- Prior art keywords
- bearing surface
- load bearing
- comfort
- level
- actual
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
- A47C31/126—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/08—Fluid mattresses or cushions
- A47C27/081—Fluid mattresses or cushions of pneumatic type
- A47C27/082—Fluid mattresses or cushions of pneumatic type with non-manual inflation, e.g. with electric pumps
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/08—Fluid mattresses or cushions
- A47C27/081—Fluid mattresses or cushions of pneumatic type
- A47C27/083—Fluid mattresses or cushions of pneumatic type with pressure control, e.g. with pressure sensors
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/08—Fluid mattresses or cushions
- A47C27/10—Fluid mattresses or cushions with two or more independently-fillable chambers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
- A47C27/18—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays in combination with inflatable bodies
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
- A47C31/123—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for beds or mattresses
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C4/00—Foldable, collapsible or dismountable chairs
- A47C4/54—Inflatable chairs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/90—Details or parts not otherwise provided for
- B60N2/914—Hydro-pneumatic adjustments of the shape
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/30—General characteristics of devices characterised by sensor means
- A61G2203/34—General characteristics of devices characterised by sensor means for pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
- A61G7/05769—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S5/00—Beds
- Y10S5/935—Beds with adjustable firmness
Abstract
An electronic system for adjusting a load bearing surface such as a chair or bed to provide a desired level of comfort comprises an array of pressure sensors located within the load bearing surface. The pressure sensors generate data indicating the actual distribution of pressure exerted by a user on the load bearing surface. An electronic processor processes the data generated by the array of pressure senors. The processor compares the fraction of total load exerted on each of a plurality of regions of the load bearing surface with a desired range for each region. If the fraction of total load for any region is not within the desired range, a servo-mechanism is activated to change the shape of the load bearing surface so that the fraction of total load on each region is within the desired range, so as to provide a desired level of comfort to the user.
Description
FEEDBACK SYSTEM FOR LOAD BEARING SURFACE
Related Application A patent application entitled "Method and Apparatus for Evaluating a Load Bearing Surface" filed for Clifford M. Gross on April 18, 1990, bearing Serial No. 07/510,653, now U.S. Patent No.
5,060,274, and assigned to the assignee hereof contains subject matter related to the subject matter of the present application.
Field of the Invention The present invention relates to a feedback system for controlling in real time the shape of a load bearing surface such as a seat or bed to provide a desired level of comfort for a user.
Background of the Invention The above-identified patent application describes a system for measuring the pressure distribution on a load bearing surface such as a seat or bed. The system of the above-identified patent application comprises a two-dimensional array of pressure sensors located within the load bearing surface and a processor for processing the data generated by the pressure sensors. Using the data generated by the pressure sensors it is possible for the processor to evaluate certain attributes of the pressure distribution on the load bearing surface. For example, it is possible to divide the load bearing surface into regions and to determine the fraction of the total load on each region, the mean and median pressure of the various regions, and the pressure gradients between regions.
By testing many different seats with many different human users, it is possible to statistically correlate subjective comfort sensations of the user with certain attributes of the objectively measured pressure distributions exerted on the seats by the users. For example, a seat pan may be divided into eight regions: left thigh, right thigh, left buttock, right buttock, two left bolsters and two right bolsters. Similarly, a seat back may be divided into eight regions: left bolster, right bolster, three lumbar regions and three thoracic regions. It is possible to statistically correlate the fraction of the total load on the seat which is exerted on each of these regions with a user's comfort.
In this manner, it is possible to determine for each seat region a desired range for the fraction of the total load which is exerted on a region. A seat may then be objectively classified as comfortable for a user if the actual distribution of the load exerted by the user on the seat is such that the load fraction in each region falls into the corresponding desired range.
Other attributes of the pressure distribution besides fraction of total load exerted on a region may also be statistically correlated with comfort. For example, small pressure gradients correlate with high comfort levels and large 20~6~.r~u pressure gradients correlate with low comfort levels. One reason for this is that small gradient values indicate that the load is more evenly distributed over a greater surface area of a seat.
It is an object of the present invention to utilize the above-described correlation between certain pressure distribution attributes and comfort to provide an electronic feedback system for automatically reconfiguring a load bearing surface such as a seat or bed to provide a user with a certain desired level of comfort.
Summar~r of the Invention The present invention is directed to an electronic feedback system for adjusting a load bearing surface such as a seat or bad to provide a desired level of comfort for a user. In an illustrative embodiment, a two-dimensional array of pressure sensors generates data indicating the actual distribution of pressure exerted by the user on the load bearing surface. The data generated by the array of pressure sensors is processed by an electronic processor.
In an illustrative embodiment of the invention, the electronic processor determines, from the data generated by the pressure sensor array, the fraction of the total load exerted on each of a plurality of regions of the load bearing surface. The processor also compares the fraction of total load on each region of the Load bearing surface with a predetermined range. In the case of a load bearing device such as a seat, it is known that ~0~617~
the seat is comfortable when the fraction of total load exerted on each of a plurality of regions is within a certain range'.
taken the fraction of total load exerted on one or more of the regions of the load bearing surface is not within the corresponding desired range, the electronic processor activates a servo-mechanism which alters the shape of the load bearing surface to redistribute the pressure in such a way so as to bring the fraction of total load on each region into the desired range.
This feedback system operates continuously and in real time.
However, to avoid having the load bearing surface reconfigure itself for each small movement of the user, time averages of the load fraction exerted on each region of the load bearing surface are illustratively calculated and utilized by the processor to control the servo-mechanism. In this way the feedback system responds to larger longer term movements of the user rather than responding to every single small movement of the user.
Tn an alternative embodiment of the invention, instead of comparing the actual load fraction exerted on each region with a range of desired values, other attributes of the actual pressure distribution on a load bearing surface may be utilized to determine if a seat or other load bearing surface is comfortable to a user. These other attributes include pressure gradients, mean pressures, median pressures, and the standard deviation of pressures in particular regions of a load bearing surface.
To change the shape of the load bearing surface, a plurality of air bladders may be located within the surface. Tn this case, the processor controls the amount of air in the individual bladders to regulate the shape of the load bearing surface.
Alternatively, a plurality of plates may be located within the surface and the positions of the plates are changed under the control of the processor to change the shape of the load bearing surface.
In short, the present invention provides a highly ergonomic interface betcveen a user and a load bearing surface such as a vehicle seat, office seat or bed.
Brief Description of the Drawing FIG 1 schematically illustrates a feedback system for reconfiguring a load bearing surface in accordance with an illustrative embodiment of the present invention.
FIG 2 and FIG 3 schematically illustrate a load bearing surface in the form of a seat which can be reconfigured in accordance with an illustrative embodiment of the present invention.
FTG 4 is a flow chart which schematically illustrates an algorithm carried out by a processor in the system of FIG 1.
FIG 5 illustrates an alternative mechanism for reconfiguring a load bearing surface.
Detailed Description of the Invention FIG 1 schematically illustrates a load bearing device 10.
Although the load bearing device 10 is shown in FIG 1 as being in the form of a rectangular solid, this geometry is intended to be illustrative only and the load bearing device 10 is intended to represent a seat, such as a vehicle or office seat, or a bed, for example. The load bearing device 10 includes a load bearing upper surface 12 which supports a load in the form of all or part of a human being.
Located within and just beneath the surface 12 is a two-dimensional array of pressure sensors 14. Illustratively, each of the pressure sensors 14 is a Force Sensing Resistor available from Interlink Electronics, Santa Barbara, California. These devices are polymer thick film devices which exhibit a decreasing resistance when an increasing force is applied in a direction normal to the device surface. The sensors are arranged in strips 16 and connected so as to form a voltage divider network.
The load bearing surface 12 is divided into a plurality of regions 1, 2, 3,4. Associated with each region 1, 2, 3, and 4 is a subset of the pressure,sensoxs 14. In some embodiments of the invention, the different regions may overlap so that some of the sensors belong to more than one region.
Located within the load bearing device 10 are a plurality of air bladders 20. In a preferred embodiment of the invention, there are one or more air bladders associated with each of the regions 1, 2, 3, 4 of the load bearing surface. Each of the air bladders 20 is connected to a source 22 of a pressure medium such as air by way of a conduit 24. A valve 26 is located in each conduit 24 to control the flow of air into and out of the associated bladder 20. Each valve 26 is controlled by a serva-mechanism illustratively in the form of a motor 28. By controlling the amount of air in each of the bladders 20, it is possible to control the shape of the load bearing surface 12 of the load bearing device 10.
The present invention includes a feedback system 30 for changing the shape of the load bearing surface 12 to provide a desired level of comfort for a human being supported by the load bearing surface. In FIG 1, the feedback system 30 includes the multiplexer 32, the interface 34, the analog-to-digital converter 36, and the processor 40. The multiplexer 32 connects a signal from any one of the pressure sensors 14 to the interface 34. The sequence in which the pressure sensors are to be interrogated are transmitted from the processor 40 to the interface 34. Analog signals from the multiplexer are transmitted through the interface unit to the analog-to-digital converter 36 wherein the signals from the pressure sensors are converted to digital form and transmitted to the processor 40 which stores these signal values in memory.
Thus, when there is a load in the form of a human being on the load bearing surface 12, the processor 40 receives from the array of pressure sensors 14 data representative of the actual distribu~~on of pressure on the Load bearing surface. This data is processed by the processor 40 ar_d, in response to this data, the processor 40 outputs signals on the lines 42 to control the moors 28. In this manner, the processor 40 controls the shape of the load bearing surface 12. In particular, the processor 40 2~~6~~U
controls the shape of the load bearing surface 12 to achieve a desired level of comfort for the user. The algorithm utilized by the processor to change the shape of the load bearing surface is described in detail below.
FIG 2 shows a partly perspective and partly cross~sectional view of a seat such as an automobile seat whose shape may be reconfigured in accordance with an illustrative embodiment of the present invention. The chair 50 is supported by a base 52. The chair 50 is divided into a plurality of sections including the headrest 54, the thoracic section 56, the lumbar section 58, the buttocks section 60 and the thigh section 62. Each section such as the buttocks section 60 includes a frame 64 for supporting the section. Each section such as the buttocks section 60 comprises a fabric outer surface 66 which is filled with the foam 68. The various sections 54, 56, 58, 60, 62 are movable with respect to each other through use of the actuators 70, 72, and 74.
To implement the present invention, an array of pressure sensors 14 is embedded under the fabric surface for the thoracic, lumbar, buttocks, and thigh sections. In addition, the thoracic, lumbar, buttocks and thigh sections of the chair 50 include the bladders 20 which are illustratively located between the frame 64 and foam 68. In the illustrative embodiment of the invention shown in FIG 3, no bladders or pressure sensors are included in the headrest 54, although in other embodiments such bladders and pressure sensors may be incorporated.
Related Application A patent application entitled "Method and Apparatus for Evaluating a Load Bearing Surface" filed for Clifford M. Gross on April 18, 1990, bearing Serial No. 07/510,653, now U.S. Patent No.
5,060,274, and assigned to the assignee hereof contains subject matter related to the subject matter of the present application.
Field of the Invention The present invention relates to a feedback system for controlling in real time the shape of a load bearing surface such as a seat or bed to provide a desired level of comfort for a user.
Background of the Invention The above-identified patent application describes a system for measuring the pressure distribution on a load bearing surface such as a seat or bed. The system of the above-identified patent application comprises a two-dimensional array of pressure sensors located within the load bearing surface and a processor for processing the data generated by the pressure sensors. Using the data generated by the pressure sensors it is possible for the processor to evaluate certain attributes of the pressure distribution on the load bearing surface. For example, it is possible to divide the load bearing surface into regions and to determine the fraction of the total load on each region, the mean and median pressure of the various regions, and the pressure gradients between regions.
By testing many different seats with many different human users, it is possible to statistically correlate subjective comfort sensations of the user with certain attributes of the objectively measured pressure distributions exerted on the seats by the users. For example, a seat pan may be divided into eight regions: left thigh, right thigh, left buttock, right buttock, two left bolsters and two right bolsters. Similarly, a seat back may be divided into eight regions: left bolster, right bolster, three lumbar regions and three thoracic regions. It is possible to statistically correlate the fraction of the total load on the seat which is exerted on each of these regions with a user's comfort.
In this manner, it is possible to determine for each seat region a desired range for the fraction of the total load which is exerted on a region. A seat may then be objectively classified as comfortable for a user if the actual distribution of the load exerted by the user on the seat is such that the load fraction in each region falls into the corresponding desired range.
Other attributes of the pressure distribution besides fraction of total load exerted on a region may also be statistically correlated with comfort. For example, small pressure gradients correlate with high comfort levels and large 20~6~.r~u pressure gradients correlate with low comfort levels. One reason for this is that small gradient values indicate that the load is more evenly distributed over a greater surface area of a seat.
It is an object of the present invention to utilize the above-described correlation between certain pressure distribution attributes and comfort to provide an electronic feedback system for automatically reconfiguring a load bearing surface such as a seat or bed to provide a user with a certain desired level of comfort.
Summar~r of the Invention The present invention is directed to an electronic feedback system for adjusting a load bearing surface such as a seat or bad to provide a desired level of comfort for a user. In an illustrative embodiment, a two-dimensional array of pressure sensors generates data indicating the actual distribution of pressure exerted by the user on the load bearing surface. The data generated by the array of pressure sensors is processed by an electronic processor.
In an illustrative embodiment of the invention, the electronic processor determines, from the data generated by the pressure sensor array, the fraction of the total load exerted on each of a plurality of regions of the load bearing surface. The processor also compares the fraction of total load on each region of the Load bearing surface with a predetermined range. In the case of a load bearing device such as a seat, it is known that ~0~617~
the seat is comfortable when the fraction of total load exerted on each of a plurality of regions is within a certain range'.
taken the fraction of total load exerted on one or more of the regions of the load bearing surface is not within the corresponding desired range, the electronic processor activates a servo-mechanism which alters the shape of the load bearing surface to redistribute the pressure in such a way so as to bring the fraction of total load on each region into the desired range.
This feedback system operates continuously and in real time.
However, to avoid having the load bearing surface reconfigure itself for each small movement of the user, time averages of the load fraction exerted on each region of the load bearing surface are illustratively calculated and utilized by the processor to control the servo-mechanism. In this way the feedback system responds to larger longer term movements of the user rather than responding to every single small movement of the user.
Tn an alternative embodiment of the invention, instead of comparing the actual load fraction exerted on each region with a range of desired values, other attributes of the actual pressure distribution on a load bearing surface may be utilized to determine if a seat or other load bearing surface is comfortable to a user. These other attributes include pressure gradients, mean pressures, median pressures, and the standard deviation of pressures in particular regions of a load bearing surface.
To change the shape of the load bearing surface, a plurality of air bladders may be located within the surface. Tn this case, the processor controls the amount of air in the individual bladders to regulate the shape of the load bearing surface.
Alternatively, a plurality of plates may be located within the surface and the positions of the plates are changed under the control of the processor to change the shape of the load bearing surface.
In short, the present invention provides a highly ergonomic interface betcveen a user and a load bearing surface such as a vehicle seat, office seat or bed.
Brief Description of the Drawing FIG 1 schematically illustrates a feedback system for reconfiguring a load bearing surface in accordance with an illustrative embodiment of the present invention.
FIG 2 and FIG 3 schematically illustrate a load bearing surface in the form of a seat which can be reconfigured in accordance with an illustrative embodiment of the present invention.
FTG 4 is a flow chart which schematically illustrates an algorithm carried out by a processor in the system of FIG 1.
FIG 5 illustrates an alternative mechanism for reconfiguring a load bearing surface.
Detailed Description of the Invention FIG 1 schematically illustrates a load bearing device 10.
Although the load bearing device 10 is shown in FIG 1 as being in the form of a rectangular solid, this geometry is intended to be illustrative only and the load bearing device 10 is intended to represent a seat, such as a vehicle or office seat, or a bed, for example. The load bearing device 10 includes a load bearing upper surface 12 which supports a load in the form of all or part of a human being.
Located within and just beneath the surface 12 is a two-dimensional array of pressure sensors 14. Illustratively, each of the pressure sensors 14 is a Force Sensing Resistor available from Interlink Electronics, Santa Barbara, California. These devices are polymer thick film devices which exhibit a decreasing resistance when an increasing force is applied in a direction normal to the device surface. The sensors are arranged in strips 16 and connected so as to form a voltage divider network.
The load bearing surface 12 is divided into a plurality of regions 1, 2, 3,4. Associated with each region 1, 2, 3, and 4 is a subset of the pressure,sensoxs 14. In some embodiments of the invention, the different regions may overlap so that some of the sensors belong to more than one region.
Located within the load bearing device 10 are a plurality of air bladders 20. In a preferred embodiment of the invention, there are one or more air bladders associated with each of the regions 1, 2, 3, 4 of the load bearing surface. Each of the air bladders 20 is connected to a source 22 of a pressure medium such as air by way of a conduit 24. A valve 26 is located in each conduit 24 to control the flow of air into and out of the associated bladder 20. Each valve 26 is controlled by a serva-mechanism illustratively in the form of a motor 28. By controlling the amount of air in each of the bladders 20, it is possible to control the shape of the load bearing surface 12 of the load bearing device 10.
The present invention includes a feedback system 30 for changing the shape of the load bearing surface 12 to provide a desired level of comfort for a human being supported by the load bearing surface. In FIG 1, the feedback system 30 includes the multiplexer 32, the interface 34, the analog-to-digital converter 36, and the processor 40. The multiplexer 32 connects a signal from any one of the pressure sensors 14 to the interface 34. The sequence in which the pressure sensors are to be interrogated are transmitted from the processor 40 to the interface 34. Analog signals from the multiplexer are transmitted through the interface unit to the analog-to-digital converter 36 wherein the signals from the pressure sensors are converted to digital form and transmitted to the processor 40 which stores these signal values in memory.
Thus, when there is a load in the form of a human being on the load bearing surface 12, the processor 40 receives from the array of pressure sensors 14 data representative of the actual distribu~~on of pressure on the Load bearing surface. This data is processed by the processor 40 ar_d, in response to this data, the processor 40 outputs signals on the lines 42 to control the moors 28. In this manner, the processor 40 controls the shape of the load bearing surface 12. In particular, the processor 40 2~~6~~U
controls the shape of the load bearing surface 12 to achieve a desired level of comfort for the user. The algorithm utilized by the processor to change the shape of the load bearing surface is described in detail below.
FIG 2 shows a partly perspective and partly cross~sectional view of a seat such as an automobile seat whose shape may be reconfigured in accordance with an illustrative embodiment of the present invention. The chair 50 is supported by a base 52. The chair 50 is divided into a plurality of sections including the headrest 54, the thoracic section 56, the lumbar section 58, the buttocks section 60 and the thigh section 62. Each section such as the buttocks section 60 includes a frame 64 for supporting the section. Each section such as the buttocks section 60 comprises a fabric outer surface 66 which is filled with the foam 68. The various sections 54, 56, 58, 60, 62 are movable with respect to each other through use of the actuators 70, 72, and 74.
To implement the present invention, an array of pressure sensors 14 is embedded under the fabric surface for the thoracic, lumbar, buttocks, and thigh sections. In addition, the thoracic, lumbar, buttocks and thigh sections of the chair 50 include the bladders 20 which are illustratively located between the frame 64 and foam 68. In the illustrative embodiment of the invention shown in FIG 3, no bladders or pressure sensors are included in the headrest 54, although in other embodiments such bladders and pressure sensors may be incorporated.
8 .
By using the feedback system described above in connection with FIG 1, air can be added or removed from the bladders 20 to change the shape of the load bearing surface formed by the seat 50. FIG 3 shows how air has been added to some of the bladders 20 in the thoracic, lumbar and thigh regions to change the shape of these regions.
An illustrative algorithm utilized by the processor 40 of FIG 1 to control the shape of a load bearing surface is illustrated by the flow chart of FIG 4. Thus, as shown in FIG 4, ZO the first step of the load bearing surface shape-changing process is to interrogate the pressure sensors 14 (box 70~of FIG 4) to obtain data representative of the actual distribution of pressure exerted by a user on a load bearing surface. Since the shape reconfiguration mechanism operates continuously, this data is time averaged (box 72~of FIG 4) to avoid changing the shape of the load bearing surface for each small movement by the user.
Rather, the shape of the load bearing surface is preferably changed only in response to larger, longer term movement of the user.
The processor 40 determines the fraction of total load exerted on each of a plurality of regions of the load bearing surface (box 74~of FIG 4). The processor then determines if the fraction of total load exerted on each region is within a desired range (box 76 of FIG 4). If the fraction of the total load in each region is within the desired range no action is taken. If the fraction of total load in each region is not within the ~f~~6~.'~
desired range, a linear programming algorithm (box 78 of FIG 4) is executed to determine how to change the shape of the load bearing surface so that the fraction of total load exerted on each region is within the desired range. Once this is done the servo-mechanism such as the motors 28 of FIG 1 are activated to change the shape of the load bearing surface. Since a feedback system is utilized, after the change in shape of the load bearing surface, the pressure sensors are again interrogated to determine if the fraction of total load in each region is in the desired range and if further changes in shape are necessary for the load bearing surface.
It should be noted that the desired range of load fraction for each region is determined experimentally by using conventional statistical techniques to statistically correlate the comfort of a statistically valid sample of users with the fraction of total load exerted on each region by these users.
The linear programming algorithm utilized by the processor 40 of FIG 1 to determine how to change the shape of a load bearing surface in the case of a seat is as follows.
2o An objective function:
N
~(Wi) (Xi'"Ai) (Bi'°Xi) i=1 is maximized subject to the following constraints N
~xi = loo i=1 Xi > Ai > O
Xi < Bi > O
By using the feedback system described above in connection with FIG 1, air can be added or removed from the bladders 20 to change the shape of the load bearing surface formed by the seat 50. FIG 3 shows how air has been added to some of the bladders 20 in the thoracic, lumbar and thigh regions to change the shape of these regions.
An illustrative algorithm utilized by the processor 40 of FIG 1 to control the shape of a load bearing surface is illustrated by the flow chart of FIG 4. Thus, as shown in FIG 4, ZO the first step of the load bearing surface shape-changing process is to interrogate the pressure sensors 14 (box 70~of FIG 4) to obtain data representative of the actual distribution of pressure exerted by a user on a load bearing surface. Since the shape reconfiguration mechanism operates continuously, this data is time averaged (box 72~of FIG 4) to avoid changing the shape of the load bearing surface for each small movement by the user.
Rather, the shape of the load bearing surface is preferably changed only in response to larger, longer term movement of the user.
The processor 40 determines the fraction of total load exerted on each of a plurality of regions of the load bearing surface (box 74~of FIG 4). The processor then determines if the fraction of total load exerted on each region is within a desired range (box 76 of FIG 4). If the fraction of the total load in each region is within the desired range no action is taken. If the fraction of total load in each region is not within the ~f~~6~.'~
desired range, a linear programming algorithm (box 78 of FIG 4) is executed to determine how to change the shape of the load bearing surface so that the fraction of total load exerted on each region is within the desired range. Once this is done the servo-mechanism such as the motors 28 of FIG 1 are activated to change the shape of the load bearing surface. Since a feedback system is utilized, after the change in shape of the load bearing surface, the pressure sensors are again interrogated to determine if the fraction of total load in each region is in the desired range and if further changes in shape are necessary for the load bearing surface.
It should be noted that the desired range of load fraction for each region is determined experimentally by using conventional statistical techniques to statistically correlate the comfort of a statistically valid sample of users with the fraction of total load exerted on each region by these users.
The linear programming algorithm utilized by the processor 40 of FIG 1 to determine how to change the shape of a load bearing surface in the case of a seat is as follows.
2o An objective function:
N
~(Wi) (Xi'"Ai) (Bi'°Xi) i=1 is maximized subject to the following constraints N
~xi = loo i=1 Xi > Ai > O
Xi < Bi > O
~Da6~plU
where:
Xi = the fraction of total load exerted on seat region i, far i = 1 to N
Ai = lower limit of region i load fraction range of a "very comfortable" seat Bi = upper limit of region i load fraction range of a "very comfortable" seat Wi = priority (i.e. weighting) factor for region i Illustratively, there are N=16 regions in the seat. In the seat back there are three thoracic regions, three lumbar regions and left and right bolster regions. Tn the seat pan there are left and right buttocks regions, left and right thigh regions, and four bolster regions.
Instead of using the foregoing algorithm, the processor 40 may evaluate a more complex algorithm. For example, an actual comfort level of a user may be set equal to a linear combination of a variety of attributes of the actual pressure distribution such as the standard deviation of the pressure distribution in particular regions, pressure gradients within or between particular regions, mean gradients in particular regions, maximum gradients in particular regions, median pressure in particular regions, fractions of total load in particular regions and sums of load fractions over several regions. When a linear combination of such attributes of the actual pressure distribution is obtained so as to obtain an actual comfort level of a user, the processor compares the actual comfort level to a desired comfort level range. If the actual comfort level is ~~~61~a outside the desired range, the shape of the load bearing surface is altered until the actual comfort level is within the desired range.
As has been indicated above, the shape of a load bearing surface can be changed by varying the quantity of air each of a plurality of air bladders within the surface. However, the shape change may be accomplished in other ways such as hydraulically or through the use of plates contained within the load bearing surface. FIG 5 shows a cross-section of a load bearing device 100 which has a load bearing surface 110. A plurality of plates 12o in the load bearing device are mounted on motor driven 'shafts (not shown and repositioned under the control of a processor to change the shape of the load bearing surface.
Finally, the above-described embodiments of the invention are intended to be illustrative only. Numerous alternative embodiments may be devised by those skilled in the art without departing from the spirit and scope of the following claims.
where:
Xi = the fraction of total load exerted on seat region i, far i = 1 to N
Ai = lower limit of region i load fraction range of a "very comfortable" seat Bi = upper limit of region i load fraction range of a "very comfortable" seat Wi = priority (i.e. weighting) factor for region i Illustratively, there are N=16 regions in the seat. In the seat back there are three thoracic regions, three lumbar regions and left and right bolster regions. Tn the seat pan there are left and right buttocks regions, left and right thigh regions, and four bolster regions.
Instead of using the foregoing algorithm, the processor 40 may evaluate a more complex algorithm. For example, an actual comfort level of a user may be set equal to a linear combination of a variety of attributes of the actual pressure distribution such as the standard deviation of the pressure distribution in particular regions, pressure gradients within or between particular regions, mean gradients in particular regions, maximum gradients in particular regions, median pressure in particular regions, fractions of total load in particular regions and sums of load fractions over several regions. When a linear combination of such attributes of the actual pressure distribution is obtained so as to obtain an actual comfort level of a user, the processor compares the actual comfort level to a desired comfort level range. If the actual comfort level is ~~~61~a outside the desired range, the shape of the load bearing surface is altered until the actual comfort level is within the desired range.
As has been indicated above, the shape of a load bearing surface can be changed by varying the quantity of air each of a plurality of air bladders within the surface. However, the shape change may be accomplished in other ways such as hydraulically or through the use of plates contained within the load bearing surface. FIG 5 shows a cross-section of a load bearing device 100 which has a load bearing surface 110. A plurality of plates 12o in the load bearing device are mounted on motor driven 'shafts (not shown and repositioned under the control of a processor to change the shape of the load bearing surface.
Finally, the above-described embodiments of the invention are intended to be illustrative only. Numerous alternative embodiments may be devised by those skilled in the art without departing from the spirit and scope of the following claims.
Claims (31)
1. An electronic feedback system for adjusting a load bearing surface comprising:
a sensor apparatus for generating data indicating a two-dimensional distribution of load exerted by an individual user on the load bearing surface, an electronic processor for receiving said two-dimensional distribution data from said sensor apparatus for determining automatically an actual comfort level of the individual user from said two-dimensional distribution data, and for electronically determining if the actual comfort level of the individual user is within a range of comfort levels predetermined to be desirable through a correlation of subjective comfort sensations with pressure distribution attributes of a statistically valid sample of users, and a reconfiguration system activated automatically by the electronic processor when the processor determines that said actual comfort level is not within said predetermined range for reconfiguring in real time the load bearing surface until the processor electronically determines that the actual comfort level of the individual user is within the predetermined range, said actual comfort level of the individual user being a time average for preventing the load bearing surface from being reconfigured for every small change in position of the individual user.
a sensor apparatus for generating data indicating a two-dimensional distribution of load exerted by an individual user on the load bearing surface, an electronic processor for receiving said two-dimensional distribution data from said sensor apparatus for determining automatically an actual comfort level of the individual user from said two-dimensional distribution data, and for electronically determining if the actual comfort level of the individual user is within a range of comfort levels predetermined to be desirable through a correlation of subjective comfort sensations with pressure distribution attributes of a statistically valid sample of users, and a reconfiguration system activated automatically by the electronic processor when the processor determines that said actual comfort level is not within said predetermined range for reconfiguring in real time the load bearing surface until the processor electronically determines that the actual comfort level of the individual user is within the predetermined range, said actual comfort level of the individual user being a time average for preventing the load bearing surface from being reconfigured for every small change in position of the individual user.
2. The system of claim 1 wherein the load bearing surface is a surface of a seat.
3. The system of claim 2 wherein said seat is a vehicle seat.
4. The system of claim 1 wherein said load bearing surface is a surface of a bed.
5. The system of claim 1 wherein said sensor apparatus comprises pressure sensing means for measuring the actual distribution of pressure exerted by the user on the load bearing surface.
6. The system of claim 5 wherein said pressure sensing means comprises an array of pressure sensors.
7. The system of claim 1 wherein said reconfiguration system includes one or more air bladders contained within the load bearing surface and said load bearing surface is reconfigured by controlling the amount of air within said one or more bladders.
8. The system of claim 1 wherein said reconfiguration system includes a plurality of plates contained within said load bearing surface, said load bearing surface being reconfigured by adjusting the position of said plates.
9. The system of claim 1 wherein said processor determines if the actual comfort level of a user is within said predetermined range by determining if a fraction of total load exerted on each of a plurality of regions of the load bearing surface is within a fractional load range predetermined for each region.
10. The system of claim 9 wherein said reconfiguration system reconfigures said load bearing surface to change the distribution of load so that the fraction of total load exerted on each region is within the corresponding predetermined fractional load range for each region.
11. A load bearing device comprising:
a load bearing surface, sensor means within said load bearing surface for detecting a two-dimensional distribution of pressure exerted on said surface by an individual user of said surface, means coupled to said load bearing surface for changing a shape of said load bearing surface, and an electronic processing system for receiving the two-dimensional pressure distribution data generated by said sensor means, for automatically determining a time averaged actual comfort level from the two-dimensional pressure distribution data, and for determining if said actual comfort level of individual user is within a range of comfort level predetermined to be desirable through a correlation of subjective comfort sensations with pressure distribution attributes of a statistically valid sample of users, and if the actual comfort level is not within the range, for automatically and in real time, controlling said shape changing means to change the shape of the load bearing surface to bring the actual level of comfort into said range.
a load bearing surface, sensor means within said load bearing surface for detecting a two-dimensional distribution of pressure exerted on said surface by an individual user of said surface, means coupled to said load bearing surface for changing a shape of said load bearing surface, and an electronic processing system for receiving the two-dimensional pressure distribution data generated by said sensor means, for automatically determining a time averaged actual comfort level from the two-dimensional pressure distribution data, and for determining if said actual comfort level of individual user is within a range of comfort level predetermined to be desirable through a correlation of subjective comfort sensations with pressure distribution attributes of a statistically valid sample of users, and if the actual comfort level is not within the range, for automatically and in real time, controlling said shape changing means to change the shape of the load bearing surface to bring the actual level of comfort into said range.
12. The load bearing device of claim 11 wherein said processing system determines if said actual level of comfort is within said predetermined range by comparing the fraction of total load exerted on each of a plurality of regions of said load bearing surface with a predetermined load fraction for each region.
13. A method for electronically adjusting a load bearing surface to maintain the comfort of an individual user over time as the individual user changes position, said method comprising the steps of:
sensing a current two-dimensional distribution of the load exerted on the load bearing surface by a particular individual user, receiving at an electronic processor data indicative of the two-dimensional distribution of the load exerted on the load bearing surface, and determining electronically through use of said electronic processor a time-averaged actual level of comfort of the particular user based on the two-dimensional distribution of load exerted on the load bearing surface and determining if the time averaged actual level of comfort is a level of comfort predetermined to be desirable through a correlation of subjective comfort sensations and pressure distribution attributes of a statistically valid sample of users, whenever the position of the particular user is such that the processor determines that the time averaged actual level of comfort of the particular user is not a predetermined desired level of comfort, automatically reconfiguring said load bearing surface under the control of said electronic processor so as to change the actual level of comfort so that it is a predetermined desired level of comfort , the load bearing surface thereby being automatically reconfigured over time in response to changes in position of the particular user of the load bearing surface to maintain the time averaged actual level of comfort of the particular user at a desired comfort level.
sensing a current two-dimensional distribution of the load exerted on the load bearing surface by a particular individual user, receiving at an electronic processor data indicative of the two-dimensional distribution of the load exerted on the load bearing surface, and determining electronically through use of said electronic processor a time-averaged actual level of comfort of the particular user based on the two-dimensional distribution of load exerted on the load bearing surface and determining if the time averaged actual level of comfort is a level of comfort predetermined to be desirable through a correlation of subjective comfort sensations and pressure distribution attributes of a statistically valid sample of users, whenever the position of the particular user is such that the processor determines that the time averaged actual level of comfort of the particular user is not a predetermined desired level of comfort, automatically reconfiguring said load bearing surface under the control of said electronic processor so as to change the actual level of comfort so that it is a predetermined desired level of comfort , the load bearing surface thereby being automatically reconfigured over time in response to changes in position of the particular user of the load bearing surface to maintain the time averaged actual level of comfort of the particular user at a desired comfort level.
14. The method of claim 13 wherein said step of determining a current actual level of comfort comprises determining the fraction of total load exerted on each of a plurality of regions of said load bearing surface and said step of determining if the current actual level of comfort is a desired predetermined level of comfort comprises determining if the fraction of total load exerted on each region is a desired fraction of total load predetermined for each region.
15. In combination, a load bearing surface for supporting an individual user, and an electronic feedback system for automatically reconfiguring the load bearing surface over time as the individual user changes position to maintain the comfort of the individual user, said electronic feedback system comprising a sensor apparatus for generating data indicative of a two-dimensional distribution of load exerted on the load bearing surface by an individual user, an electronic processor for receiving said data generated by said sensor apparatus, and for automatically electronically determining in response to said two-dimensional distribution data an actual comfort level of the user and, on a time average basis, whether said actual level of comfort is a level of comfort predetermined to be desirable by a correlation of subjective comfort sensations and pressure distribution attributes of a statistically valid sample of users, and apparatus automatically activated by said processor when said processor determines said individual user does not have a desirable level of comfort for reconfiguring said load bearing surface to provide said individual user with a desirable level of comfort.
16. The combination of claim 15 wherein said load bearing surface is the surface of a seat.
17. The combination of claim 15 wherein said sensor apparatus comprises a two-dimensional array of pressure sensors.
18. The combination of claim 15 wherein said processor determines if the user has an acceptable level of comfort by determining if the fraction of total load exerted on each of a plurality of regions of the load bearing surface is within a predetermined range.
19. In combination, a load bearing surface for supporting an individual user, and an electronic feedback system for automatically reconfiguring the load bearing surface on a time averaged basis to maintain the comfort of the individual user, said electronic feedback system comprising a sensor apparatus for generating data indicative of a two-dimensional distribution of load exerted on the load bearing surface by the individual user, a processor for receiving said data generated by said sensor apparatus, for automatically electronically determining in response to said data whether an actual comfort level of the individual user is a comfort level predetermined to be acceptable by a statistical correlation of subjective comfort sensations and pressure distribution attributes of a group of users, and for optimizing an objective function of pressure distribution attributes to determine a reconfiguration of the load bearing surface when the actual comfort level of the user is not acceptable, and apparatus automatically activated by said processor for reconfiguring said load bearing surface to provide said individual user with an acceptable level of comfort, said load bearing surface being reconfigured on a time averaged basis for preventing the load bearing surface from being reconfigured for every small change in position of the individual user.
20. An electronic system for adjusting a load bearing surface to provide a desired level of comfort for an individual user comprising:
pressure sensing means for generating data indicating the actual distribution of pressure exerted by said individual user on said surface, electronic processing means for processing said data generated by said pressure sensing means for determining from said data a time average actual comfort level of said individual user, and for determining if said actual comfort level is a desired comfort level, servo-means responsive to said processing means for reconfiguring said load bearing surface until said actual level of comfort is a desired level of comfort for the individual user, said actual comfort level of the individual user being a time average for preventing the load bearing surface from being reconfigured for every small change in position of the individual user.
pressure sensing means for generating data indicating the actual distribution of pressure exerted by said individual user on said surface, electronic processing means for processing said data generated by said pressure sensing means for determining from said data a time average actual comfort level of said individual user, and for determining if said actual comfort level is a desired comfort level, servo-means responsive to said processing means for reconfiguring said load bearing surface until said actual level of comfort is a desired level of comfort for the individual user, said actual comfort level of the individual user being a time average for preventing the load bearing surface from being reconfigured for every small change in position of the individual user.
21. An electronic system for adjusting a load bearing surface to provide a desired level of comfort for a user comprising:
pressure sensing means for generating data indicating the actual distribution of pressure exerted by said user on said surface, electronic processing means for processing said data generated by said pressure sensing means, and servo-means responsive to said processing means for reconfiguring said load bearing surface so as to change the distribution of pressure exerted by the user on said load bearing surface to achieve a desired level of comfort for the user, characterized in that - said pressure sensing means generates data indicating a two-dimensional distribution of load exerted by an individual user on the lead bearing surface, - said electronic processing means determines an actual comfort level of the individual user from said two-dimensional distribution data and determines if the actual comfort level of the individual user is within a range of comfort levels predetermined to be desirable through a correlation of subjective comfort sensations with pressure distribution attributes of a statically valid sample of users, and - said servo-means is activated by said electronic processing means when said electronic processing means determines that said actual comfort level is not within said pretermined range for reconfiguring in real time the load bearing surface until said electronic processing means determines that the actual comfort level of the individual user is within the predetermined range, - said actual comfort level of the individual user being a time average for preventing the load bearing surface from being reconfigured for every small change in position of the individual user.
pressure sensing means for generating data indicating the actual distribution of pressure exerted by said user on said surface, electronic processing means for processing said data generated by said pressure sensing means, and servo-means responsive to said processing means for reconfiguring said load bearing surface so as to change the distribution of pressure exerted by the user on said load bearing surface to achieve a desired level of comfort for the user, characterized in that - said pressure sensing means generates data indicating a two-dimensional distribution of load exerted by an individual user on the lead bearing surface, - said electronic processing means determines an actual comfort level of the individual user from said two-dimensional distribution data and determines if the actual comfort level of the individual user is within a range of comfort levels predetermined to be desirable through a correlation of subjective comfort sensations with pressure distribution attributes of a statically valid sample of users, and - said servo-means is activated by said electronic processing means when said electronic processing means determines that said actual comfort level is not within said pretermined range for reconfiguring in real time the load bearing surface until said electronic processing means determines that the actual comfort level of the individual user is within the predetermined range, - said actual comfort level of the individual user being a time average for preventing the load bearing surface from being reconfigured for every small change in position of the individual user.
22. The system according to claim 21, characterized in that said load bearing surface forms part of a seat.
23. The system according to claim 22, characterized in that said seat is a vehicle seat.
24. The system according to claim 22, characterized in that said seat is an office seat.
25. The system according to claim 21, characterized in that said load bearing surface forms part of a bed.
26. The system according to claim 21, characterized in that one or more air bladders are contained within said load bearing surface and said servo-means reconfigures said load bearing surface by controlling the amount of air within said one or more bladders.
27. The system according to claim 21, characterized in that a plurality of plates is contained within said load bearing surface and said servo-means comprises means for adjusting the position of said plates.
28. The system according to claim 21, characterized in that said pressure sensing means comprises a two-dimensional array of individual pressure sensors.
29. The system according to claim 28, characterized in that said electronic processing means determines the fraction of total load exerted on each of a plurality of regions of said load bearing surface and compares the fraction of total load for each region with a predetermined load range for each region.
30. The system according to claim 29, characterized in that said servo-means reconfigures said load bearing surface to change the distribution of load in said regions so that the fraction of total load exerted on each region is within the corresponding predetermined range for each region.
31. A method for adjusting a load bearing surface to provide a desired level of comfort for an individual user comprising the steps of:
sensing the actual distribution of pressure exerted by said individual user on said load bearing surface and generating data, processing said data, and reconfiguring the shape of said load bearing surface, thereby achieving a desired level of comfort for the individual user, characterized in that said method further includes the steps of:
- sensing a current two-dimensional distribution of the load exerted on the load bearing surface by a particular user, - receiving data indicative of the two-dimensional distribution of the load exerted on the load bearing surface, and - determining electronically a time-averaged actual level of comfort of the particular user based on the two-dimensional distribution of the load exerted on the load bearing surface and determining if the time-averaged actual level of comfort is a level of comfort predetermined to be desirable through a correlation of subjective comfort sensations with pressure distribution attributes of a statistically valid sample of users, - whenever a position of a particular user is such that it is determined that the time-averaged actual level of comfort of the particular user is not a predetermined desired level of comfort, reconfiguring said load bearing surface so as to change the actual level of comfort so that it is a predetermined desired level of comfort.
- the load bearing surface thereby being reconfigured over time in response to changes in position of the particular user of the load bearing surface to maintain the time-averaged actual level of comfort of the particular user at a desired comfort level.
sensing the actual distribution of pressure exerted by said individual user on said load bearing surface and generating data, processing said data, and reconfiguring the shape of said load bearing surface, thereby achieving a desired level of comfort for the individual user, characterized in that said method further includes the steps of:
- sensing a current two-dimensional distribution of the load exerted on the load bearing surface by a particular user, - receiving data indicative of the two-dimensional distribution of the load exerted on the load bearing surface, and - determining electronically a time-averaged actual level of comfort of the particular user based on the two-dimensional distribution of the load exerted on the load bearing surface and determining if the time-averaged actual level of comfort is a level of comfort predetermined to be desirable through a correlation of subjective comfort sensations with pressure distribution attributes of a statistically valid sample of users, - whenever a position of a particular user is such that it is determined that the time-averaged actual level of comfort of the particular user is not a predetermined desired level of comfort, reconfiguring said load bearing surface so as to change the actual level of comfort so that it is a predetermined desired level of comfort.
- the load bearing surface thereby being reconfigured over time in response to changes in position of the particular user of the load bearing surface to maintain the time-averaged actual level of comfort of the particular user at a desired comfort level.
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---|---|---|---|
US07/623,220 US5170364A (en) | 1990-12-06 | 1990-12-06 | Feedback system for load bearing surface |
US623,220 | 1990-12-06 |
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---|---|---|---|
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---|---|
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016075599A1 (en) * | 2014-11-10 | 2016-05-19 | Ecole Polytechnique Federale De Lausanne (Epfl) | System for adjusting pressure locally acting on the skin and subcutaneous tissue |
Families Citing this family (235)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5606754A (en) | 1989-03-09 | 1997-03-04 | Ssi Medical Services, Inc. | Vibratory patient support system |
US5170364A (en) * | 1990-12-06 | 1992-12-08 | Biomechanics Corporation Of America | Feedback system for load bearing surface |
US5253656A (en) * | 1991-05-23 | 1993-10-19 | Rincoe Richard G | Apparatus and method for monitoring contact pressure between body parts and contact surfaces |
GB9223296D0 (en) * | 1992-11-06 | 1992-12-23 | Univ Loughborough | Ergonomic chair |
US6230501B1 (en) | 1994-04-14 | 2001-05-15 | Promxd Technology, Inc. | Ergonomic systems and methods providing intelligent adaptive surfaces and temperature control |
US6098000A (en) | 1994-06-24 | 2000-08-01 | Mccord Winn Textron Inc. | Interactive, individually controlled, multiple bladder seating comfort adjustment system and method |
US5556169A (en) * | 1994-07-15 | 1996-09-17 | Parrish; Milton E. | Multi-layer conformable support system |
US5586067A (en) * | 1994-07-19 | 1996-12-17 | Bcam International, Inc. | Support enhancing device and associated method |
US5587933A (en) * | 1994-07-19 | 1996-12-24 | Bcam International, Inc. | Support enhancing device and associated method |
US5666681A (en) * | 1995-01-03 | 1997-09-16 | Hill-Rom, Inc. | Heel pressure management apparatus and method |
US5687099A (en) * | 1995-02-06 | 1997-11-11 | Gross; Clifford M. | Body support with adaptive pressurization |
US5755647A (en) * | 1995-05-16 | 1998-05-26 | Lawrence I. Wechsler | Exercise appliance for abdominal muscles and method of using same |
US6584628B1 (en) | 1995-08-04 | 2003-07-01 | Hill-Rom Services, Inc. | Hospital bed having a rotational therapy device |
US6119291A (en) * | 1995-08-04 | 2000-09-19 | Hill-Rom, Inc. | Percussion and vibration therapy apparatus |
US6047424A (en) * | 1995-08-04 | 2000-04-11 | Hill-Rom, Inc. | Bed having modular therapy devices |
US5630238A (en) * | 1995-08-04 | 1997-05-20 | Hill-Rom, Inc. | Bed with a plurality of air therapy devices, having control modules and an electrical communication network |
US5662384A (en) * | 1995-11-14 | 1997-09-02 | Peter W. Linley | Dynamic seating support system |
DE19545168A1 (en) * | 1995-12-04 | 1997-06-05 | Bayerische Motoren Werke Ag | Seat with variable pressure hollow chambers that have an elastic support wall |
US5658050A (en) * | 1996-01-11 | 1997-08-19 | Milsco Manufacturing Company | Vehicle seat with inflatable bladder |
DE19601974C2 (en) * | 1996-01-20 | 1998-07-02 | Daimler Benz Ag | Method for determining the pressure comfort of a seat and / or backrest cushion |
US5625914A (en) * | 1996-02-01 | 1997-05-06 | Schwab; Patrick R. | Automatic mattress surface contour and support changing apparatus with wave sensors |
GB9610900D0 (en) * | 1996-05-24 | 1996-07-31 | Ljubomir Gnjatovic | A bed |
DE19644376A1 (en) | 1996-10-25 | 1998-04-30 | Bayerische Motoren Werke Ag | Adjustment device for a vehicle seat |
EP0932519B1 (en) * | 1996-10-25 | 2001-01-17 | Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 | Process for adjusting a vehicle seat |
US6067019A (en) * | 1996-11-25 | 2000-05-23 | Hill-Rom, Inc. | Bed exit detection apparatus |
FR2757377B1 (en) * | 1996-12-23 | 1999-03-12 | Support Systems International | METHOD AND APPARATUS FOR SUPPORTING A SUPPORTING ELEMENT, IN PARTICULAR THE BODY OF A PATIENT ALLOWING SUPPORT FOR A PREDETERMINED FLOAT LINE |
US6055473A (en) * | 1997-02-19 | 2000-04-25 | General Motors Corporation | Adaptive seating system |
JP2000236979A (en) * | 1999-02-19 | 2000-09-05 | Riyuuzou Waguri | Oscillatory chair device |
US5894966A (en) * | 1997-06-26 | 1999-04-20 | Hill-Rom, Inc. | Bariatric bed |
US6694557B1 (en) | 1997-06-26 | 2004-02-24 | Hill-Rom Services, Inc. | Bariatric bed |
US6036924A (en) | 1997-12-04 | 2000-03-14 | Hewlett-Packard Company | Cassette of lancet cartridges for sampling blood |
US6391005B1 (en) | 1998-03-30 | 2002-05-21 | Agilent Technologies, Inc. | Apparatus and method for penetration with shaft having a sensor for sensing penetration depth |
DE19826485A1 (en) * | 1998-06-13 | 2000-01-20 | Volkswagen Ag | Method and device for detecting pressure or force effects on a surface layer of an object |
US6422087B1 (en) | 1998-07-15 | 2002-07-23 | Rostra Precision Controls, Inc. | Electronic control system for a variable support mechanism |
EP0972472B1 (en) * | 1998-07-16 | 2001-03-14 | Bartholomäus Niedermühlbichler | Method for adjusting a sitting or lying element |
US6088642A (en) * | 1998-07-29 | 2000-07-11 | Mccord Winn Textron Inc. | Interactive, individually controlled, multiple bladder seating comfort adjustment system and method |
EP1123074A4 (en) * | 1998-10-28 | 2004-12-29 | Hill Rom Co Inc | Force optimization surface apparatus and method |
US6721980B1 (en) * | 1998-10-28 | 2004-04-20 | Hill-Fom Services, Inc. | Force optimization surface apparatus and method |
DE19851698A1 (en) * | 1998-11-10 | 2000-05-11 | Bosch Gmbh Robert | Device and method for adjusting a vehicle seat |
DE19853156B4 (en) * | 1998-11-18 | 2006-04-13 | Girsberger Holding Ag | Seat |
GB9825514D0 (en) * | 1998-11-21 | 1999-01-13 | Linear Motion Technology Llc | Improvement in pressure pad devices |
US7834768B2 (en) | 1999-03-05 | 2010-11-16 | Hill-Rom Services, Inc. | Obstruction detection apparatus for a bed |
US6133837A (en) * | 1999-03-05 | 2000-10-17 | Hill-Rom, Inc. | Patient position system and method for a support surface |
CN1302196A (en) | 1999-05-11 | 2001-07-04 | 鲍尔斯应用流体力学公司 | Jet pulse generator and massage and method |
GB9911227D0 (en) * | 1999-05-15 | 1999-07-14 | Johnson Controls Automotive Uk | Memory device for reclining vehicle seat |
US6237994B1 (en) * | 1999-06-11 | 2001-05-29 | Weber Aircraft, Inc. | Multi-function seats |
CH693299A5 (en) * | 1999-07-15 | 2003-05-30 | Doc Ag | Cushion, in particular mattress. |
JP4450129B2 (en) * | 2000-07-05 | 2010-04-14 | 株式会社デンソー | Crew identification system for automobiles |
DK1339369T3 (en) | 2000-11-07 | 2010-03-29 | Tempur World Llc | Therapeutic mattress assembly |
US8641644B2 (en) | 2000-11-21 | 2014-02-04 | Sanofi-Aventis Deutschland Gmbh | Blood testing apparatus having a rotatable cartridge with multiple lancing elements and testing means |
GB2370222A (en) * | 2000-12-19 | 2002-06-26 | Autoliv Dev | Vehicle seat accessory providing lumbar / pelvic / shoulder support induced by weight of sitting person |
GB2370359A (en) * | 2000-12-22 | 2002-06-26 | Bridgestone Corp | Method of evaluating seat comfort |
US6557937B1 (en) | 2001-04-09 | 2003-05-06 | The Research Foundation Of State University Of New York | Pressure-relieving wheelchair seating apparatus |
US6761398B2 (en) | 2001-05-25 | 2004-07-13 | Weber Aircraft Lp | Stowable tables |
US8337419B2 (en) | 2002-04-19 | 2012-12-25 | Sanofi-Aventis Deutschland Gmbh | Tissue penetration device |
US7025774B2 (en) | 2001-06-12 | 2006-04-11 | Pelikan Technologies, Inc. | Tissue penetration device |
US9795747B2 (en) | 2010-06-02 | 2017-10-24 | Sanofi-Aventis Deutschland Gmbh | Methods and apparatus for lancet actuation |
US7981056B2 (en) | 2002-04-19 | 2011-07-19 | Pelikan Technologies, Inc. | Methods and apparatus for lancet actuation |
US7682318B2 (en) | 2001-06-12 | 2010-03-23 | Pelikan Technologies, Inc. | Blood sampling apparatus and method |
US9427532B2 (en) | 2001-06-12 | 2016-08-30 | Sanofi-Aventis Deutschland Gmbh | Tissue penetration device |
DE60234598D1 (en) | 2001-06-12 | 2010-01-14 | Pelikan Technologies Inc | SELF-OPTIMIZING LANZET DEVICE WITH ADAPTANT FOR TEMPORAL FLUCTUATIONS OF SKIN PROPERTIES |
US9226699B2 (en) | 2002-04-19 | 2016-01-05 | Sanofi-Aventis Deutschland Gmbh | Body fluid sampling module with a continuous compression tissue interface surface |
US7749174B2 (en) | 2001-06-12 | 2010-07-06 | Pelikan Technologies, Inc. | Method and apparatus for lancet launching device intergrated onto a blood-sampling cartridge |
ATE485766T1 (en) | 2001-06-12 | 2010-11-15 | Pelikan Technologies Inc | ELECTRICAL ACTUATING ELEMENT FOR A LANCET |
EP1404234B1 (en) | 2001-06-12 | 2011-02-09 | Pelikan Technologies Inc. | Apparatus for improving success rate of blood yield from a fingerstick |
DE20112013U1 (en) * | 2001-07-25 | 2002-12-19 | Oehler Claus | Adjustment device for two-wheel saddles |
DE10202579C1 (en) * | 2002-01-24 | 2003-05-28 | Daimler Chrysler Ag | Internal pressure control method e.g. for pneumatically adjustable automobile passenger seat, has pressure increase effected in successive steps |
JP2003265544A (en) * | 2002-03-18 | 2003-09-24 | Paramount Bed Co Ltd | Method for controlling body oppression and displacement when adjusting bottom undulation in beds |
US6870341B2 (en) | 2002-04-15 | 2005-03-22 | Paramount Bed Co., Ltd. | Method of controlling the coordinative lifting of bottom sections of lying furniture such as a bed |
US7976476B2 (en) | 2002-04-19 | 2011-07-12 | Pelikan Technologies, Inc. | Device and method for variable speed lancet |
US8579831B2 (en) | 2002-04-19 | 2013-11-12 | Sanofi-Aventis Deutschland Gmbh | Method and apparatus for penetrating tissue |
US8702624B2 (en) | 2006-09-29 | 2014-04-22 | Sanofi-Aventis Deutschland Gmbh | Analyte measurement device with a single shot actuator |
US9314194B2 (en) | 2002-04-19 | 2016-04-19 | Sanofi-Aventis Deutschland Gmbh | Tissue penetration device |
US7892185B2 (en) | 2002-04-19 | 2011-02-22 | Pelikan Technologies, Inc. | Method and apparatus for body fluid sampling and analyte sensing |
US7648468B2 (en) | 2002-04-19 | 2010-01-19 | Pelikon Technologies, Inc. | Method and apparatus for penetrating tissue |
US7232451B2 (en) | 2002-04-19 | 2007-06-19 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7175642B2 (en) | 2002-04-19 | 2007-02-13 | Pelikan Technologies, Inc. | Methods and apparatus for lancet actuation |
US7547287B2 (en) | 2002-04-19 | 2009-06-16 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US9795334B2 (en) | 2002-04-19 | 2017-10-24 | Sanofi-Aventis Deutschland Gmbh | Method and apparatus for penetrating tissue |
US8784335B2 (en) | 2002-04-19 | 2014-07-22 | Sanofi-Aventis Deutschland Gmbh | Body fluid sampling device with a capacitive sensor |
US7297122B2 (en) | 2002-04-19 | 2007-11-20 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7331931B2 (en) | 2002-04-19 | 2008-02-19 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7291117B2 (en) | 2002-04-19 | 2007-11-06 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7892183B2 (en) | 2002-04-19 | 2011-02-22 | Pelikan Technologies, Inc. | Method and apparatus for body fluid sampling and analyte sensing |
US9248267B2 (en) | 2002-04-19 | 2016-02-02 | Sanofi-Aventis Deustchland Gmbh | Tissue penetration device |
US8267870B2 (en) | 2002-04-19 | 2012-09-18 | Sanofi-Aventis Deutschland Gmbh | Method and apparatus for body fluid sampling with hybrid actuation |
US7371247B2 (en) | 2002-04-19 | 2008-05-13 | Pelikan Technologies, Inc | Method and apparatus for penetrating tissue |
US7674232B2 (en) | 2002-04-19 | 2010-03-09 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7229458B2 (en) | 2002-04-19 | 2007-06-12 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7901362B2 (en) | 2002-04-19 | 2011-03-08 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7909778B2 (en) | 2002-04-19 | 2011-03-22 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7717863B2 (en) | 2002-04-19 | 2010-05-18 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7491178B2 (en) | 2002-04-19 | 2009-02-17 | Pelikan Technologies, Inc. | Method and apparatus for penetrating tissue |
US7226461B2 (en) | 2002-04-19 | 2007-06-05 | Pelikan Technologies, Inc. | Method and apparatus for a multi-use body fluid sampling device with sterility barrier release |
US8360992B2 (en) | 2002-04-19 | 2013-01-29 | Sanofi-Aventis Deutschland Gmbh | Method and apparatus for penetrating tissue |
US8221334B2 (en) | 2002-04-19 | 2012-07-17 | Sanofi-Aventis Deutschland Gmbh | Method and apparatus for penetrating tissue |
EP1374739A3 (en) * | 2002-06-18 | 2004-04-14 | Hygrama Ag | Seat with adjustable profile and module support |
US8574895B2 (en) | 2002-12-30 | 2013-11-05 | Sanofi-Aventis Deutschland Gmbh | Method and apparatus using optical techniques to measure analyte levels |
DE602004008045T2 (en) * | 2003-03-12 | 2008-04-30 | Jetta Company Ltd. | ADJUSTABLE MATTRESS AND CUSHION SYSTEM |
EP1628567B1 (en) | 2003-05-30 | 2010-08-04 | Pelikan Technologies Inc. | Method and apparatus for fluid injection |
DK1633235T3 (en) | 2003-06-06 | 2014-08-18 | Sanofi Aventis Deutschland | Apparatus for sampling body fluid and detecting analyte |
WO2006001797A1 (en) | 2004-06-14 | 2006-01-05 | Pelikan Technologies, Inc. | Low pain penetrating |
US7587072B2 (en) * | 2003-08-22 | 2009-09-08 | Authentec, Inc. | System for and method of generating rotational inputs |
US8282576B2 (en) | 2003-09-29 | 2012-10-09 | Sanofi-Aventis Deutschland Gmbh | Method and apparatus for an improved sample capture device |
EP1680014A4 (en) | 2003-10-14 | 2009-01-21 | Pelikan Technologies Inc | Method and apparatus for a variable user interface |
EP1526031B1 (en) * | 2003-10-21 | 2009-11-25 | TS Tech Co., Ltd | Vehicle seat with system for facilitating relieving of fatigue of person sitting on the seat |
CA2449382A1 (en) * | 2003-11-27 | 2005-05-27 | Garry Robinson | Vehicle seat with dual independently adjustable supports |
EP1706026B1 (en) | 2003-12-31 | 2017-03-01 | Sanofi-Aventis Deutschland GmbH | Method and apparatus for improving fluidic flow and sample capture |
US7822454B1 (en) | 2005-01-03 | 2010-10-26 | Pelikan Technologies, Inc. | Fluid sampling device with improved analyte detecting member configuration |
US7697729B2 (en) * | 2004-01-29 | 2010-04-13 | Authentec, Inc. | System for and method of finger initiated actions |
GB0402316D0 (en) * | 2004-02-03 | 2004-03-10 | Eleksen Ltd | Position and pressure detector |
US20050179657A1 (en) * | 2004-02-12 | 2005-08-18 | Atrua Technologies, Inc. | System and method of emulating mouse operations using finger image sensors |
MXPA06009993A (en) * | 2004-03-02 | 2007-03-21 | Patient Transfer Systems Inc | Patient transfer device having inclined upper surface. |
WO2005104904A1 (en) * | 2004-04-30 | 2005-11-10 | Tactex Controls Inc. | Body support apparatus having automatic pressure control and related methods |
US7883478B2 (en) * | 2004-04-30 | 2011-02-08 | Hill-Rom Services, Inc. | Patient support having real time pressure control |
US8828203B2 (en) | 2004-05-20 | 2014-09-09 | Sanofi-Aventis Deutschland Gmbh | Printable hydrogels for biosensors |
EP1765194A4 (en) | 2004-06-03 | 2010-09-29 | Pelikan Technologies Inc | Method and apparatus for a fluid sampling device |
US9775553B2 (en) | 2004-06-03 | 2017-10-03 | Sanofi-Aventis Deutschland Gmbh | Method and apparatus for a fluid sampling device |
DE102004034816B4 (en) * | 2004-07-19 | 2007-08-30 | Erdelt, Herwig K., Dr.med. | Device for moving the spine during the sleep and resting phases of a person lying and method for controlling such a device and their use |
US20060016016A1 (en) * | 2004-07-26 | 2006-01-26 | Hornbach David W | Modular bed system |
US7319386B2 (en) | 2004-08-02 | 2008-01-15 | Hill-Rom Services, Inc. | Configurable system for alerting caregivers |
AT501818A1 (en) * | 2004-12-07 | 2006-11-15 | Greiner Purtec Gmbh | SEAT PAD FOR A SEAT, ESPECIALLY PLANE SEAT |
US8652831B2 (en) | 2004-12-30 | 2014-02-18 | Sanofi-Aventis Deutschland Gmbh | Method and apparatus for analyte measurement test time |
CN101115438B (en) * | 2005-02-07 | 2010-06-16 | 皇家飞利浦电子股份有限公司 | Device for determining a stress level of a person and providing feedback on the basis of the stress level as determined |
US7831070B1 (en) | 2005-02-18 | 2010-11-09 | Authentec, Inc. | Dynamic finger detection mechanism for a fingerprint sensor |
US8231056B2 (en) * | 2005-04-08 | 2012-07-31 | Authentec, Inc. | System for and method of protecting an integrated circuit from over currents |
FR2886229A1 (en) * | 2005-05-26 | 2006-12-01 | Thierry Mazaud | Pneumatic seat device for motor vehicle, has pneumatic pipe supplying air to base and backrest of seat, and pneumatic controls actuating opening of solenoid valves for increasing or reducing air pressure contained in base and backrest |
JP5208732B2 (en) * | 2005-06-10 | 2013-06-12 | ヒル−ロム サービシーズ,インコーポレイティド | Control means for pressurized bag in patient support device |
US7716761B1 (en) | 2005-07-06 | 2010-05-18 | Gilstad Dennis W | Adaptive positioning system |
US8117701B2 (en) | 2005-07-08 | 2012-02-21 | Hill-Rom Services, Inc. | Control unit for patient support |
WO2007016054A2 (en) * | 2005-07-26 | 2007-02-08 | Hill-Rom Services, Inc. | System and method of controlling an air mattress |
DE102005038289B3 (en) * | 2005-08-12 | 2007-03-08 | Metzeler Schaum Gmbh | Method for detecting and changing a distribution of pressure on a sitting or lying arrangement caused by a human body and such a sitting or lying arrangement |
US7940249B2 (en) * | 2005-11-01 | 2011-05-10 | Authentec, Inc. | Devices using a metal layer with an array of vias to reduce degradation |
US8104122B2 (en) | 2005-12-19 | 2012-01-31 | Hill-Rom Services, Inc. | Patient support having an extendable foot section |
WO2007097979A2 (en) * | 2006-02-10 | 2007-08-30 | Atrua Technologies, Inc. | Systems using variable resistance zones and stops for generating inputs to an electronic device |
JP4290704B2 (en) * | 2006-02-13 | 2009-07-08 | 忠男 倉田 | Body part weight measurement system |
US20070199154A1 (en) * | 2006-02-24 | 2007-08-30 | Escaross Essam B | System and method for adjusting pressure in pockets or zones |
DE102006015523A1 (en) * | 2006-03-31 | 2007-10-04 | Recaro Aircraft Seating Gmbh & Co. Kg | seat device |
EP2019911B1 (en) * | 2006-05-09 | 2015-04-01 | Hill-Rom Services, Inc. | Pulmonary mattress |
US7885436B2 (en) * | 2006-07-13 | 2011-02-08 | Authentec, Inc. | System for and method of assigning confidence values to fingerprint minutiae points |
US9235274B1 (en) | 2006-07-25 | 2016-01-12 | Apple Inc. | Low-profile or ultra-thin navigation pointing or haptic feedback device |
WO2008030981A2 (en) * | 2006-09-06 | 2008-03-13 | Blumberg J Seth | Digital bed system |
US7849545B2 (en) | 2006-11-14 | 2010-12-14 | Hill-Rom Industries Sa | Control system for hospital bed mattress |
US7784131B2 (en) * | 2007-09-07 | 2010-08-31 | Anodyne Medical Devices, Llc | Distributed pressure control for support surfaces |
DE102007053119A1 (en) * | 2007-11-08 | 2009-05-14 | Bayerische Motoren Werke Aktiengesellschaft | Method and device for adjusting a seat and seat |
WO2009089647A1 (en) * | 2008-01-14 | 2009-07-23 | Han-Chung Hsu | Chair adapted to adjust according to person's sitting-posture vertebral curve (i) |
WO2009100579A1 (en) * | 2008-02-04 | 2009-08-20 | Han-Chung Hsu | Chair adapted to adjust according to person's sitting-posture vertebral curve |
US9785330B1 (en) | 2008-02-13 | 2017-10-10 | Apple Inc. | Systems for and methods of providing inertial scrolling and navigation using a fingerprint sensor calculating swiping speed and length |
ES2405106T3 (en) | 2008-02-14 | 2013-05-30 | Kingsdown, Inc. | Apparatus and methods that provide variable support and variable comfort control of a sleeping system and automatic adjustment thereof |
EP2540194B1 (en) * | 2008-02-14 | 2014-04-30 | Kingsdown, Inc. | Apparatuses and methods for evaluating a person for a sleep system |
WO2009108228A1 (en) * | 2008-02-25 | 2009-09-03 | Kingsdown, Inc. | Systems and methods for controlling a bedroom environment and for providing sleep data |
WO2009105935A1 (en) * | 2008-02-27 | 2009-09-03 | Hsu Han-Chung | Chair adapted to adjust according to person's sitting-posture vertebral curve (iii) |
WO2009126900A1 (en) | 2008-04-11 | 2009-10-15 | Pelikan Technologies, Inc. | Method and apparatus for analyte detecting device |
US8914928B2 (en) | 2008-09-10 | 2014-12-23 | Huntleigh Technology Limited | Angle detection and control |
US8593284B2 (en) | 2008-09-19 | 2013-11-26 | Hill-Rom Services, Inc. | System and method for reporting status of a bed |
US7841663B2 (en) * | 2008-10-01 | 2010-11-30 | Lear Corporation | Vehicle seat lumbar system |
US8801635B2 (en) | 2008-10-03 | 2014-08-12 | Hlz Innovation, Llc | Adjustable pneumatic supporting surface |
EP2348918A1 (en) * | 2008-10-13 | 2011-08-03 | George Papaioannou | Adaptable surface for use in beds and chairs to reduce occurrence of pressure ulcers |
WO2010048112A1 (en) * | 2008-10-24 | 2010-04-29 | Hill-Rom Services, Inc. | Apparatuses for supporting and monitoring a person |
US9375169B2 (en) | 2009-01-30 | 2016-06-28 | Sanofi-Aventis Deutschland Gmbh | Cam drive for managing disposable penetrating member actions with a single motor and motor and control system |
US7992217B2 (en) * | 2009-04-30 | 2011-08-09 | The Invention Science Fund I, Llc | Shape changing material |
US8784342B2 (en) * | 2009-04-30 | 2014-07-22 | The Invention Science Fund I Llc | Shape sensing clothes to inform the wearer of a condition |
US20100289302A1 (en) * | 2009-05-14 | 2010-11-18 | Nitring Enterprise Inc. | Seat adjusting method and system thereof |
DE102009021532A1 (en) * | 2009-05-15 | 2010-11-18 | Nitring Enterprise Inc. | Vehicle chair adjusting method, involves comparing pressure signals with pressure values, and adjusting air amount in pockets based on comparison result, where comparison and adjustment steps are performed until signals correspond to values |
FR2946427B1 (en) | 2009-06-05 | 2011-09-30 | Hill Rom Ind Sa | PRESSURE SENSOR COMPRISING A CAPACITIVE CELL AND SUPPORT DEVICE HAVING THE SAME. |
CN201542119U (en) * | 2009-06-23 | 2010-08-11 | 许汉忠 | Seat capable of automatically supporting human body vertebral curve |
US8752220B2 (en) | 2009-07-10 | 2014-06-17 | Hill-Rom Services, Inc. | Systems for patient support, monitoring and treatment |
US8525679B2 (en) * | 2009-09-18 | 2013-09-03 | Hill-Rom Services, Inc. | Sensor control for apparatuses for supporting and monitoring a person |
US20110301432A1 (en) | 2010-06-07 | 2011-12-08 | Riley Carl W | Apparatus for supporting and monitoring a person |
US8965476B2 (en) | 2010-04-16 | 2015-02-24 | Sanofi-Aventis Deutschland Gmbh | Tissue penetration device |
US8844073B2 (en) | 2010-06-07 | 2014-09-30 | Hill-Rom Services, Inc. | Apparatus for supporting and monitoring a person |
US8717181B2 (en) | 2010-07-29 | 2014-05-06 | Hill-Rom Services, Inc. | Bed exit alert silence with automatic re-enable |
US8432287B2 (en) | 2010-07-30 | 2013-04-30 | Hill-Rom Services, Inc. | Apparatus for controlling room lighting in response to bed exit |
US9345335B2 (en) * | 2010-09-27 | 2016-05-24 | Gualtiero G. Giori | Pressure control and feedback system for an adjustable foam support apparatus |
US8803682B2 (en) | 2010-12-07 | 2014-08-12 | J.T. Labs Limited | Sleep-posture sensing and monitoring system |
DE102012201331A1 (en) * | 2011-03-02 | 2012-09-06 | Ford Global Technologies, Llc | Seat, in particular vehicle seat, with a deformation element and method for driving a deformation element of a seat |
US9707142B2 (en) * | 2011-03-03 | 2017-07-18 | Hill-Rom Services, Inc. | Occupant support and method for positioning an occupant on the occupant support |
CH705224A1 (en) * | 2011-07-01 | 2013-01-15 | Compliant Concept Ag | Apparatus for changing characteristics of an airfoil for health prophylaxis and corresponding method. |
WO2013014948A1 (en) * | 2011-07-28 | 2013-01-31 | 東海ゴム工業株式会社 | Mattress and method for controlling same |
US20130104312A1 (en) * | 2011-10-26 | 2013-05-02 | Span-America Medical Systems, Inc. | Mattress with capacitive immersion control |
US9827156B2 (en) | 2011-11-11 | 2017-11-28 | Hill-Rom Services, Inc. | Person support apparatus |
KR101213400B1 (en) * | 2011-12-05 | 2012-12-21 | 주식회사 세라젬셀루피딕 | Method and apparatus for controlling pressure of mattress |
US8973186B2 (en) | 2011-12-08 | 2015-03-10 | Hill-Rom Services, Inc. | Optimization of the operation of a patient-support apparatus based on patient response |
US9655795B2 (en) * | 2012-04-10 | 2017-05-23 | Hill-Rom Services, Inc. | Occupant support with a migration sensitive bladder and method for migration detection |
JP6261879B2 (en) | 2012-05-22 | 2018-01-17 | ヒル−ロム サービシズ,インコーポレイテッド | User bed prediction system, method and apparatus |
US9861550B2 (en) | 2012-05-22 | 2018-01-09 | Hill-Rom Services, Inc. | Adverse condition detection, assessment, and response systems, methods and devices |
US9228885B2 (en) | 2012-06-21 | 2016-01-05 | Hill-Rom Services, Inc. | Patient support systems and methods of use |
US9833369B2 (en) | 2012-06-21 | 2017-12-05 | Hill-Rom Services, Inc. | Patient support systems and methods of use |
US8973193B2 (en) * | 2012-08-08 | 2015-03-10 | Richard N. Codos | Methods of optimizing a pressure contour of a pressure adjustable platform system |
JP6019982B2 (en) * | 2012-09-18 | 2016-11-02 | オムロンヘルスケア株式会社 | Body exercise equipment |
US10292605B2 (en) | 2012-11-15 | 2019-05-21 | Hill-Rom Services, Inc. | Bed load cell based physiological sensing systems and methods |
US9333136B2 (en) | 2013-02-28 | 2016-05-10 | Hill-Rom Services, Inc. | Sensors in a mattress cover |
US10238560B2 (en) | 2013-03-13 | 2019-03-26 | Hill-Rom Services, Inc. | Air fluidized therapy bed having pulmonary therapy |
US9655798B2 (en) | 2013-03-14 | 2017-05-23 | Hill-Rom Services, Inc. | Multi-alert lights for hospital bed |
FR3013328B1 (en) * | 2013-11-20 | 2017-08-04 | Zodiac Seats France | SELF-ADJUSTABLE AIRCRAFT SEAT TO THE MORPHOLOGY OF A PASSENGER |
GB2522452B (en) * | 2014-01-24 | 2017-07-19 | Chapelglade Ltd | System for measuring body characteristics relevant for mattress selection |
US10328823B2 (en) | 2014-06-09 | 2019-06-25 | Lear Corporation | Adjustable seat assembly |
US9987961B2 (en) | 2014-06-09 | 2018-06-05 | Lear Corporation | Adjustable seat assembly |
US9849734B2 (en) | 2014-10-31 | 2017-12-26 | The Goodyear Tire & Rubber Company | Pneumatic tire with a three dimensional component |
US20160128490A1 (en) * | 2014-11-07 | 2016-05-12 | Chien-chuan Cheng | Automatic inflatable cushion |
NL2014089B1 (en) * | 2015-01-07 | 2016-09-30 | Duux Int B V | Comfortable child seat. |
US9776724B2 (en) * | 2015-05-13 | 2017-10-03 | Ami Industries, Inc. | Varying tube size of seat to prolong comfort in aerospace vehicle |
US9884570B2 (en) | 2015-05-19 | 2018-02-06 | Lear Corporation | Adjustable seat assembly |
US9845026B2 (en) | 2015-05-19 | 2017-12-19 | Lear Corporation | Adjustable seat assembly |
US10765577B2 (en) | 2015-06-30 | 2020-09-08 | Hill-Rom Services, Inc. | Microclimate system for a patient support apparatus |
US10624804B2 (en) | 2015-08-18 | 2020-04-21 | Hill-Rom Services, Inc. | Microclimate management airflow control based on incontinence detection |
US9661928B2 (en) | 2015-09-29 | 2017-05-30 | Lear Corporation | Air bladder assembly for seat bottoms of seat assemblies |
US10085565B2 (en) | 2015-12-09 | 2018-10-02 | Lear Corporation | Sacral air bladder assembly |
US9949568B2 (en) * | 2015-12-09 | 2018-04-24 | Lear Corporation | Pelvic and sacral bladder assembly |
US9827888B2 (en) | 2016-01-04 | 2017-11-28 | Lear Corporation | Seat assemblies with adjustable side bolster actuators |
US10071603B2 (en) | 2016-04-26 | 2018-09-11 | The Goodyear Tire & Rubber Company | Lightweight tire |
US10085570B2 (en) * | 2016-05-13 | 2018-10-02 | Srigiri Shankar Bellam | Posture detection and correction cushion |
JP6577420B2 (en) * | 2016-06-23 | 2019-09-18 | アイシン精機株式会社 | Pneumatic control device for vehicle seat and pneumatic control method for vehicle seat |
ES2648539B1 (en) * | 2016-06-29 | 2018-06-27 | David LOPEZ ESCRIBANO | Adaptive Organoleptic Body Support |
US10561253B2 (en) * | 2016-07-29 | 2020-02-18 | Bryte, Inc. | Adaptive sleep system using data analytics and learning techniques to improve individual sleep conditions |
US10363852B2 (en) * | 2016-09-15 | 2019-07-30 | Ford Global Technologies, Llc | Apparatus and method for customizing a vehicle seat |
CN106420138A (en) * | 2016-10-27 | 2017-02-22 | 福建中医药大学 | Three-dimensional action control device capable of individually adjusting curvature sectional spine traction bed |
CN106344244A (en) * | 2016-10-27 | 2017-01-25 | 福建中医药大学 | Gradient individually-adjustable three-dimensional air cushion structure for sectional backbone drawing bed |
US10575654B2 (en) | 2016-10-28 | 2020-03-03 | Sleep Number Corporation | Air manifold |
JP6782486B2 (en) * | 2016-10-28 | 2020-11-11 | 学校法人 工学院大学 | Force measuring device and biomechanical analysis system |
US10993546B2 (en) | 2016-10-28 | 2021-05-04 | Sleep Number Corporation | Noise reducing plunger |
US11627816B2 (en) * | 2017-01-16 | 2023-04-18 | Textron Innovations, Inc. | Automatically adjusting comfort system |
CN106580650A (en) * | 2017-01-23 | 2017-04-26 | 惠州金桔家具有限公司 | Expansion pad massage device |
CN107878278B (en) * | 2017-11-09 | 2020-01-10 | 吉林大学 | Array type automobile seat profile self-adaptive adjusting device and method |
JP6660425B2 (en) * | 2018-07-20 | 2020-03-11 | ミネベアミツミ株式会社 | Attitude control device |
JP7245431B2 (en) * | 2019-02-01 | 2023-03-24 | トヨタ自動車株式会社 | vehicle |
US11389352B2 (en) | 2019-04-07 | 2022-07-19 | Sleepme Inc. | Devices and methods to help prevent decubitus ulcers |
CN112826271B (en) * | 2019-11-25 | 2023-02-03 | 魏宏帆 | Seat device and support device |
JP7110255B2 (en) * | 2020-02-07 | 2022-08-01 | ミネベアミツミ株式会社 | Attitude control device |
US11786046B2 (en) | 2020-04-07 | 2023-10-17 | Lg Electronics Inc. | Bed |
KR20210124679A (en) * | 2020-04-07 | 2021-10-15 | 엘지전자 주식회사 | Bed |
KR20210124680A (en) * | 2020-04-07 | 2021-10-15 | 엘지전자 주식회사 | Control method of bed |
CN112092686A (en) * | 2020-08-20 | 2020-12-18 | 艾福迈汽车系统(上海)有限公司 | Adaptive seat comfort system based on fit of passenger and seat and adjusting method |
US11649004B2 (en) * | 2021-03-30 | 2023-05-16 | Toyota Motor Engineering & Manufacturing North America, Inc. | Seat devices comprising artificial muscles |
US11832728B2 (en) | 2021-08-24 | 2023-12-05 | Sleep Number Corporation | Controlling vibration transmission within inflation assemblies |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2348124C3 (en) * | 1973-09-25 | 1978-06-15 | Gerard Kingersheim Burgin (Frankreich) | Seat and / or backrest cushions for a chair or armchair |
CH585541A5 (en) * | 1974-09-25 | 1977-03-15 | Marpal Ag | |
DE2922619A1 (en) * | 1979-06-02 | 1980-12-11 | Battelle Institut E V | Recliner couch or seat for spinal support - consists of segments adjustable as to pressure using regulator system |
JPS5925709A (en) * | 1982-07-31 | 1984-02-09 | アイシン精機株式会社 | Air lamber support apparatus |
JPS59230833A (en) * | 1983-06-14 | 1984-12-25 | Hitachi Ltd | Driver's seat |
IL69528A (en) * | 1983-08-19 | 1988-06-30 | Brig Res Ltd | Apparatus for the prevention of pressure sores |
US4634083A (en) * | 1984-09-11 | 1987-01-06 | Cae Electronics Ltd. | Helicopter seat isolation system |
JPS61154587A (en) * | 1984-12-26 | 1986-07-14 | 奈良スポ−ツ株式会社 | Apparatus for controlling clamping force of ski boots |
ATE46250T1 (en) * | 1985-07-24 | 1989-09-15 | Raichle Sportschuh Ag | SPORTS BOOT, ESPECIALLY SKI BOOT. |
JPS62238142A (en) * | 1986-04-08 | 1987-10-19 | Ikeda Bussan Co Ltd | Centralized control device for vehicle loaded device |
US4797962A (en) * | 1986-11-05 | 1989-01-17 | Air Plus, Inc. | Closed loop feedback air supply for air support beds |
IT1203852B (en) * | 1987-04-03 | 1989-02-23 | Claudio Zarotti | STRUCTURE OF ARMCHAIR, SOFA AND SIMILAR |
DE3804960C2 (en) * | 1988-02-18 | 1998-06-04 | Mannesmann Vdo Ag | Procedure for monitoring the filling of air chambers in a seat |
US4890235A (en) * | 1988-07-14 | 1989-12-26 | The Cleveland Clinic Foundation | Computer aided prescription of specialized seats for wheelchairs or other body supports |
US4999932A (en) * | 1989-02-14 | 1991-03-19 | Royce Medical Company | Variable support shoe |
US5060174A (en) * | 1990-04-18 | 1991-10-22 | Biomechanics Corporation Of America | Method and apparatus for evaluating a load bearing surface such as a seat |
US5170364A (en) * | 1990-12-06 | 1992-12-08 | Biomechanics Corporation Of America | Feedback system for load bearing surface |
-
1990
- 1990-12-06 US US07/623,220 patent/US5170364A/en not_active Expired - Lifetime
-
1991
- 1991-11-21 EP EP91119825A patent/EP0489310B1/en not_active Expired - Lifetime
- 1991-11-21 DE DE69124490T patent/DE69124490T2/en not_active Expired - Fee Related
- 1991-11-26 CA CA002056176A patent/CA2056176C/en not_active Expired - Fee Related
- 1991-12-06 JP JP3323140A patent/JPH05337021A/en active Pending
-
1992
- 1992-12-04 US US07/986,094 patent/US5283735A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016075599A1 (en) * | 2014-11-10 | 2016-05-19 | Ecole Polytechnique Federale De Lausanne (Epfl) | System for adjusting pressure locally acting on the skin and subcutaneous tissue |
US10945911B2 (en) | 2014-11-10 | 2021-03-16 | Ecole Polytechnique Federale De Lausanne (Epfl) | System for adjusting pressure locally on the skin and subcutaneous tissue |
Also Published As
Publication number | Publication date |
---|---|
EP0489310A1 (en) | 1992-06-10 |
US5283735A (en) | 1994-02-01 |
JPH05337021A (en) | 1993-12-21 |
DE69124490D1 (en) | 1997-03-13 |
DE69124490T2 (en) | 1997-05-22 |
CA2056176A1 (en) | 1992-06-07 |
EP0489310B1 (en) | 1997-01-29 |
US5170364A (en) | 1992-12-08 |
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EEER | Examination request | ||
MKLA | Lapsed |