US20040143217A1 - Device for administering an injectable product - Google Patents
Device for administering an injectable product Download PDFInfo
- Publication number
- US20040143217A1 US20040143217A1 US10/720,985 US72098503A US2004143217A1 US 20040143217 A1 US20040143217 A1 US 20040143217A1 US 72098503 A US72098503 A US 72098503A US 2004143217 A1 US2004143217 A1 US 2004143217A1
- Authority
- US
- United States
- Prior art keywords
- fluid
- drive
- piston
- space
- partial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
- A61M5/1454—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons spring-actuated, e.g. by a clockwork
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M2005/14513—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons with secondary fluid driving or regulating the infusion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
- A61M5/14566—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir for receiving a piston rod of the pump
Definitions
- the invention relates to a device for administering an injectable product.
- Injection devices for example injection syringes or injection pens, such as the invention relates to in particular though not exclusively, conventionally comprise a casing which accommodates an ampoule with the product to be injected, a delivering means for delivering the product out of the ampoule and a coupling means.
- the delivering means is conventionally formed by a piston which is movable in the ampoule.
- the muscular power of the user serves as the drive means.
- the use of spring elements, in particular pressure springs, as the drive means is also known.
- the coupling means forms a transmission link or drive connection from the drive means to the delivering means.
- the known drive means for example drive springs
- the drive energy changes in accordance with the spring characteristic.
- the delivering rate of the delivering means follows such changes.
- the delivery rate changes in the course of delivery in accordance with the changing drive energy.
- the invention is based on a device for administering an injectable product which includes a casing, a container for the product accommodated by the casing, a delivering means, a drive means and a transmission link or coupling means.
- the product is delivered directly out of the container by the delivering means.
- the drive means supplies the drive energy required for this, said drive energy being transmitted in the transmission link to the delivering means, in such a way that the delivering means is driven by the drive means, to deliver the product.
- the container, the delivering means, the drive means and the transmission members of the transmission link are preferably arranged in the casing. Other arrangements are, however, in principle equally possible.
- the injectable product is preferably a medical or cosmetic agent, in particular in the form of a liquid active solution. A prominent example is insulin, administered using the device within the context of a treatment for diabetes.
- the device is preferably an infusion device. It can, however, also be an injection device.
- the container can, in particular, be formed as an ampoule, as is the case in known infusion devices.
- the delivering means is preferably formed by a piston accommodated by the container, which is advanced towards an outlet of the container, to deliver the product. However, instead of such a piston, the delivering means can in principle be formed by any type of pump suitable for delivering the product.
- the drive means is preferably formed in such a way that it releases the energy stored in it when it is triggered. Via a coupling means, this released energy is transmitted in the transmission link to the delivering means which, driven for its part in this way, delivers the product out of the container.
- the drive means is preferably formed by a drive spring, particularly preferably a pressure spring. In principle, however, other designs of drive means may also be used, e.g. those which release a pressure gas when triggered.
- a fluid space for an incompressible fluid and a pressure reducing means are provided in the transmission link from the drive means to the delivering means, i.e. in the coupling means.
- the fluid space correspondingly comprises a drive side, upon which the drive means acts, and a driven side, which acts on the delivering means. Both the drive side and the driven side can be connected, directly or via other transmission members, to the drive means and/or delivering means respectively.
- the fluid space can be impinged on its drive side by pressure from the drive means. The pressure thus generated is reduced toward the driven side of the fluid space by the pressure reducing means.
- the pressure is preferably reduced to a fifth or less and particularly preferably to a tenth or less by means of the pressure reducing means.
- the pressure reducing means creates a fluid connection which only allows a delayed flow of the fluid from the drive side towards the driven side, such that in a dynamic state, i.e. while the delivering means is being driven, a greater fluid pressure prevails on the drive side than on the driven side.
- the invention enables a drive means to be used in which substantially more energy is stored than would be required to drive the delivering means and the resulting delivery of the product.
- the comparatively large drive energy released when the drive means is triggered is attenuated by the fluid coupling in accordance with the invention onto the measure required for delivering and administering.
- the excess of drive energy is available, controlled due to the fluid coupling in accordance with the invention, for driving the delivering means.
- a drive spring is used as the drive means, as is preferred, then the spring strength of this drive means can be significantly higher than in the case of a direct drive connection to the delivering means.
- such a drive spring can be operated in a smaller range of its spring characteristic than would be possible in the case of a direct coupling.
- a working stroke of the drive means is transmitted into a working stroke of the delivering means by the fluid coupling, said working stroke of the delivering means being greater than the working stroke of the drive means.
- the respective working stroke is the stretching or straining of the spring and the distance covered by the piston in dependence on this working stroke.
- the delivering means is formed as a piston and the drive means likewise acts on a piston, designated in the following as a drive piston.
- the drive side of the fluid space is formed by a piston area of the drive piston.
- the piston area of the drive piston is preferably larger than a piston area of a driven piston, wherein the piston area of the driven piston forms the driven side of the fluid space.
- the driven piston can form the delivering means directly.
- the driven piston is, however, preferably another piston.
- the fluid space is sub-divided into a first partial space including the drive side and a second partial space including the driven side, and the two partial spaces are connected to each other exclusively by a system of capillaries, if a higher pressure prevails on the drive side than on the driven side of the fluid space.
- the system of capillaries can be formed by a single capillary or also by a plurality of capillaries.
- the capillary or plurality of capillaries is/are advantageously as long as possible. Its/their length is preferably at least 0.5 m. If a plurality of capillaries are formed, this preferably applies to each of the capillaries.
- the through-flow rate in long capillaries is less dependent on the diameter of the capillary, as directly follows from the Hagen-Poiseuille Law. According to the Hagen-Poiseuille Law, variations in the diameter due to imprecision in production enter into the through-flow rate in the fourth power. However, with an increasing length of the capillary, its diameter can likewise be enlarged, if the through-flow rate is to remain constant.
- the system of capillaries preferably comprises a capillary running spirally, or a plurality of such capillaries.
- the system of capillaries is formed by a single, spiral capillary.
- a spiral capillary not only has the advantage of a large length, but can also be simply produced.
- it can be formed in the form of an external or internal thread on a corresponding surface area, preferably a shell or jacket surface area, of a capillary body.
- the capillary body with the external or internal thread is preferably placed into or onto another body with a smooth opposite surface area, wherein care must be taken that the threads of the capillary body are sealed against each other on the opposite surface area.
- FIG. 1 an infusion device in a longitudinal section
- FIG. 2 a capillary in accordance with Detail I of FIG. 1;
- FIG. 3 an alternative embodiment of a capillary.
- FIG. 1 shows a longitudinal section of an infusion device.
- a circular cylindrical outer sleeve 3 together with a sealing piece 9 at a proximal end and a sealing cap 19 at a distal end, forms a casing of the infusion device.
- a container holder 4 a is held centred in a proximal region of the outer sleeve 3 .
- a container 1 in the form of an ampoule is accommodated by the container holder 4 a , likewise centred with respect to the central longitudinal axis of the outer sleeve 3 .
- the container 1 is filled with a product to be injected, for example insulin.
- a delivering means 2 in the form of a delivering piston is furthermore movably accommodated by the container, in a straight line toward an outlet of the container 1 .
- a catheter 20 is connected to the outlet of the container 1 in a manner known in its own right
- An inner sleeve 4 b is arranged in a distal region of the infusion device, concentric with respect to the outer sleeve 3 .
- the container holder 4 a and the inner sleeve 4 b are formed as a one-piece sleeve.
- the container holder 4 a and the inner sleeve 4 b could also be separate components. However, forming them as one piece simplifies holding them commonly centred in the outer sleeve 3 , as can be directly inferred from FIG. 1 and the subsequent description.
- An inner surface area of the inner sleeve 4 b forms a slide bearing for a driven piston 6 accommodated by the inner sleeve 4 b , said driven piston being connected rigidly to the delivering piston 2 by means of a piston rod 7 .
- the driven piston 6 and the piston rod 7 are formed as one piece.
- the piston rod 7 abuts the delivering piston 2 . It could also be firmly connected to the delivering piston 2 ; for example, it could be screwed to the delivering piston 2 .
- the piston rod 7 can equally be guided into a collar region between the container holder 4 a and the inner sleeve 4 b , for example guided fluid-proof.
- the driven piston 6 seals toward the inner sleeve 4 b using sealing rings 17 in the manner of piston rings.
- a ring space is formed between the outer sleeve 3 and the inner sleeve 4 b , a drive piston 5 being arranged in said ring space.
- the drive piston 5 is a ring piston which is slid back and forth, fluid-proof and tight, between the outer sleeve 3 and the inner sleeve 4 b .
- Sealing rings 15 are accommodated by grooves in an inner surface area of the drive piston 5 and other sealing rings 16 are accommodated by grooves on an outer surface area of the drive piston 5 , each in the manner of piston rings.
- the drive piston 5 comprises a plane ring area on a distal front face. The drive piston 5 tapers toward the inner sleeve 4 b in the proximal direction.
- the taper is formed by means of a collar.
- An opposite area of the infusion device lies opposite the collar, seen in the proximal direction.
- the opposite area is formed by a distance piece in the form of a distance ring 9 a , which surrounds the container holder 4 a and lies loose on the sealing piece 9 .
- a pressure spring 8 is accommodated between the two opposing areas, i.e. the collar of the drive piston 5 and the distance ring 9 a , abutting the two areas.
- a capillary body 10 is arranged behind the drive piston 5 in the distal direction.
- the capillary body 10 comprises a proximal ring region and is occluded by a base at its distal end.
- the capillary body 10 is sealed fluid-proof against the outer sleeve 3 and preferably also against the inner sleeve 4 b .
- a distal front area of the inner sleeve 4 b pushes fluid-proof against the base of the capillary body 10 via a sealing ring 18 .
- the capillary body 10 is provided with a aperture opening 14 in the region of a distal opening on the front face of the inner sleeve 4 b which is sealed by the sealing ring 18 .
- the reflux valve comprises a valve ball 11 which is pressed into its fitting within the capillary body 10 in a known way by means of a valve spring 12 .
- the valve spring 12 is in turn supported on a valve closure 13 .
- a fluid space is formed between the distal front area of the drive piston 5 and a distal front area of the driven piston 6 , said fluid space being occluded fluid-proof by said two pistons 5 and 6 and comprising a first partial space 21 and a second partial space 22 .
- the two partial spaces 21 and 22 are separated from each other by the capillary body 10 .
- the fluid space 21 , 22 is completely filled with an incompressible working fluid.
- a highly viscous oil is preferably used as the working fluid.
- the reflux valve 11 , 12 , 13 only allows a through-flow of the working fluid from the partial space 22 into the partial space 21 , and prevents a through-flow in the other direction.
- the capillary body 10 together with an inner surface area of the outer sleeve 3 surrounding the capillary body, forms a fluid connection in the form of a system of capillaries.
- the system of capillaries is shown in Detail I of FIG. 2. It is formed by a single, connected fluid channel, namely a capillary 23 .
- the capillary 23 in the form of a multiple thread, encircles the outer surface area of the capillary body 10 in a spiral. In principle, the capillary 23 can also be formed by a single thread.
- the capillary 23 connects the two partial fluid spaces 21 and 22 .
- the inner surface area of the outer sleeve 3 opposite the capillary 23 is simply smooth.
- the capillary body 10 is guided into the outer sleeve 3 by a slight pressing power.
- the “teeth” on the outer surface area of the capillary body 10 which separate the individual threads of the capillary 23 from each other, press fluid-proof against the inner surface area of the outer sleeve 3 .
- the teeth of the capillary body 10 are flattened for sealing purposes.
- the capillary body 10 consists of a softer material than the outer sleeve 3 , in order to improve sealing.
- the outer sleeve 3 could also in principle be made of a softer material than the capillary body 10 .
- FIG. 3 An alternative embodiment of a capillary 23 is shown in FIG. 3.
- the capillary 23 is formed in one insert as a straight fluid channel.
- the insert is held fluid-proof in a receptacle of the capillary body.
- a bore which extends the capillary 23 of the insert is formed in the capillary body 10 , such that in this embodiment too, a fluid connection is provided between the two partial spaces 21 and 22 by means of a capillary 23 .
- the container 1 is filled with the product and the delivering piston 2 correspondingly assumes its distal position in the container 1 .
- the driven piston 6 also correspondingly assumes its distal position in the inner sleeve 4 b . In this distal position, the driven piston 6 is ideally occluded by the rear front area of the inner sleeve 4 b , in order to keep the overall length of the device as short as possible.
- the partial fluid space 22 exhibits its smallest volume.
- the partial fluid space 23 correspondingly exhibits its largest volume.
- the driven piston 6 is held in its distal position either directly by the user or preferably by means of a latch.
- the drive piston 5 assumes its proximal position. In this proximal position of the drive piston 5 , the pressure spring 8 is tensed between the two areas formed by the collar area of the drive piston 5 and the distance ring 9 a.
- an injection needle arranged at the proximal end of the catheter 20 is inserted, and the latch on the driven piston 6 or the piston rod 7 respectively is released.
- a fluid pressure is built up in the partial fluid space 21 via the drive piston 5 .
- This fluid pressure can only be decreased by the capillary 23 .
- fluid flows out of the partial fluid space 21 , through the capillary 23 , into the partial fluid space 22 .
- the driven piston 6 is moved in the proximal direction by the pressure building in the partial fluid space 22 .
- the partial fluid space 21 thus forms a drive side and the partial fluid space 22 a driven side of the fluid space 21 , 22 as a whole. More precisely, the drive side is formed by a piston area of the drive piston 5 facing the partial fluid space 21 , and the drive side by a piston area of the driven piston 6 facing the partial fluid space 22 .
- a pressure reducing means is formed by the capillary body 10 , the outer sleeve 3 and the capillary 23 formed by their co-operation.
- a constructively determined drop in pressure is effected by said pressure reducing means. Due to the drop in pressure generated, it is possible to use a stronger pressure spring 8 for driving the delivering piston 2 than would be possible in an unchoked drive.
- the piston area of the drive piston 5 is larger than the piston area of the driven piston 6 .
- a stroke of the drive piston 5 effects a comparatively greater stroke of the driven piston 6 .
- the driven piston 6 in turn acts directly on the delivering piston 2 by means of the rigid piston rod 7 .
- a complete stroke of the driven piston 6 corresponds to the stroke of the delivering piston 2 .
- the stroke of the delivering piston 2 is in turn determined by the conventionally used containers 1 .
- the complete working stroke of the delivering piston 2 which corresponds to a complete delivery of the contents of the container 1 , compares with a by comparison substantially shorter working stroke of the drive piston 5 and thus of the pressure spring 8 .
- the delivering piston 2 is charged with a pressure of about one bar, i.e. it exerts such a pressure on the contents of the container 1 .
- the fluid coupling is correspondingly formed to transmit the force of the pressure spring 8 from the drive side of the fluid space 21 , 22 onto the driven side. This is substantially achieved by the pressure reducing means formed by the outer sleeve 3 , the capillary body 10 and the capillary 23 , and by the size ratio of the two piston areas of the pistons 5 and 6 .
- the container 1 can be re-filled to administer product again, or preferably replaced with a new, filled container.
- the delivering piston 2 is retracted by means of the piston rod 7 to the starting position shown in FIG. 1.
- the piston rod 7 is latched by a suitable locking means.
- the driven piston 6 pushes the fluid out of the completely filled partial fluid space 22 into the partial fluid space 21 .
- the fluid flows out of the internal space of the inner sleeve 4 b , through the opening 14 in the base of the capillary body 10 , and via a small intermediate space between the sealing cap 19 and the capillary body 10 to the reflux valve 11 , 12 , 13 .
- the reflux valve opens and the fluid flows through the through-flow formed by the reflux valve and into the partial fluid space 21 .
- the pressure of the pressure spring 8 has to be overcome to advance the drive piston 5 in the proximal direction and ultimately into the starting position shown. The device is then ready to deliver product again.
Abstract
The invention relates to a device for administering an injectable product, comprising:
a) a casing (3);
b) a container for said product accommodated by said casing (3)
c) a delivering means (2) for delivering product out of said container (1);
d) a drive means (8); and
e) a transmission link via which said drive means (8) drives said delivering means (2).
The device is characterised in that:
f) a fluid space (21, 22) for an incompressible fluid and
g) a pressure reducing means (3, 10, 23) are provided in said transmission link;
h) wherein said fluid space (21, 22) can be impinged on a drive side by pressure from said drive means (8) and said pressure reducing means (3, 10, 23) reduces a fluid pressure generated by said drive means (8) toward a driven side of said fluid space (21, 22).
Description
- 1. Technical Field
- The invention relates to a device for administering an injectable product.
- 2. Description of the Related Art
- Injection devices, for example injection syringes or injection pens, such as the invention relates to in particular though not exclusively, conventionally comprise a casing which accommodates an ampoule with the product to be injected, a delivering means for delivering the product out of the ampoule and a coupling means. The delivering means is conventionally formed by a piston which is movable in the ampoule. In simple syringes, the muscular power of the user serves as the drive means. The use of spring elements, in particular pressure springs, as the drive means is also known. The coupling means forms a transmission link or drive connection from the drive means to the delivering means.
- The known drive means, for example drive springs, have the disadvantage that the drive force or drive energy applied by them is subject to changes in the course of being released. In drive springs, the drive energy changes in accordance with the spring characteristic. The delivering rate of the delivering means follows such changes. Correspondingly, the delivery rate changes in the course of delivery in accordance with the changing drive energy.
- It is an object of the invention to provide a device for administering an injectable product, with which the product is evenly delivered in the course of an injection or infusion.
- The invention is based on a device for administering an injectable product which includes a casing, a container for the product accommodated by the casing, a delivering means, a drive means and a transmission link or coupling means. The product is delivered directly out of the container by the delivering means. The drive means supplies the drive energy required for this, said drive energy being transmitted in the transmission link to the delivering means, in such a way that the delivering means is driven by the drive means, to deliver the product.
- The container, the delivering means, the drive means and the transmission members of the transmission link are preferably arranged in the casing. Other arrangements are, however, in principle equally possible. The injectable product is preferably a medical or cosmetic agent, in particular in the form of a liquid active solution. A prominent example is insulin, administered using the device within the context of a treatment for diabetes. The device is preferably an infusion device. It can, however, also be an injection device. The container can, in particular, be formed as an ampoule, as is the case in known infusion devices. The delivering means is preferably formed by a piston accommodated by the container, which is advanced towards an outlet of the container, to deliver the product. However, instead of such a piston, the delivering means can in principle be formed by any type of pump suitable for delivering the product.
- According to its type, the drive means is preferably formed in such a way that it releases the energy stored in it when it is triggered. Via a coupling means, this released energy is transmitted in the transmission link to the delivering means which, driven for its part in this way, delivers the product out of the container. The drive means is preferably formed by a drive spring, particularly preferably a pressure spring. In principle, however, other designs of drive means may also be used, e.g. those which release a pressure gas when triggered.
- According to the invention, a fluid space for an incompressible fluid and a pressure reducing means are provided in the transmission link from the drive means to the delivering means, i.e. in the coupling means.
- The fluid space correspondingly comprises a drive side, upon which the drive means acts, and a driven side, which acts on the delivering means. Both the drive side and the driven side can be connected, directly or via other transmission members, to the drive means and/or delivering means respectively. The fluid space can be impinged on its drive side by pressure from the drive means. The pressure thus generated is reduced toward the driven side of the fluid space by the pressure reducing means. The pressure is preferably reduced to a fifth or less and particularly preferably to a tenth or less by means of the pressure reducing means. The pressure reducing means creates a fluid connection which only allows a delayed flow of the fluid from the drive side towards the driven side, such that in a dynamic state, i.e. while the delivering means is being driven, a greater fluid pressure prevails on the drive side than on the driven side.
- The invention enables a drive means to be used in which substantially more energy is stored than would be required to drive the delivering means and the resulting delivery of the product. The comparatively large drive energy released when the drive means is triggered is attenuated by the fluid coupling in accordance with the invention onto the measure required for delivering and administering. The excess of drive energy is available, controlled due to the fluid coupling in accordance with the invention, for driving the delivering means. If a drive spring is used as the drive means, as is preferred, then the spring strength of this drive means can be significantly higher than in the case of a direct drive connection to the delivering means. In particular, such a drive spring can be operated in a smaller range of its spring characteristic than would be possible in the case of a direct coupling.
- Particularly preferably, a working stroke of the drive means is transmitted into a working stroke of the delivering means by the fluid coupling, said working stroke of the delivering means being greater than the working stroke of the drive means. In the case of a pressure or tension spring as the drive means and a piston as the delivering means, the respective working stroke is the stretching or straining of the spring and the distance covered by the piston in dependence on this working stroke.
- Particularly preferably, the delivering means is formed as a piston and the drive means likewise acts on a piston, designated in the following as a drive piston. In this embodiment, the drive side of the fluid space is formed by a piston area of the drive piston. The piston area of the drive piston is preferably larger than a piston area of a driven piston, wherein the piston area of the driven piston forms the driven side of the fluid space.
- Through this ratio of the two piston areas, a stroke of the drive piston is transmitted into a comparatively larger stroke of the driven piston. Expressed differently, a smaller stroke of the drive piston is required to achieve a given stroke of the driven piston. The working stroke of the drive piston can be kept correspondingly short. The drive means can be operated in a tight range around its optimal operating point. Furthermore, the different-sized piston areas lead to a reduction of force. The force exerted by the drive piston is reduced in accordance with the ratio of the areas of the drive piston and driven piston. This reduction occurs in addition to the reduction of force as a result of the reduction of pressure. The Applicant reserves the right to independently further prosecute the feature of the different-sized piston areas, together with features a) to e) of
claim 1. - The driven piston can form the delivering means directly. The driven piston is, however, preferably another piston.
- In a particularly preferred example embodiment, the fluid space is sub-divided into a first partial space including the drive side and a second partial space including the driven side, and the two partial spaces are connected to each other exclusively by a system of capillaries, if a higher pressure prevails on the drive side than on the driven side of the fluid space. The system of capillaries can be formed by a single capillary or also by a plurality of capillaries.
- The capillary or plurality of capillaries is/are advantageously as long as possible. Its/their length is preferably at least 0.5 m. If a plurality of capillaries are formed, this preferably applies to each of the capillaries. The through-flow rate in long capillaries is less dependent on the diameter of the capillary, as directly follows from the Hagen-Poiseuille Law. According to the Hagen-Poiseuille Law, variations in the diameter due to imprecision in production enter into the through-flow rate in the fourth power. However, with an increasing length of the capillary, its diameter can likewise be enlarged, if the through-flow rate is to remain constant. Larger diameters are on the one hand by their very nature simpler to produce than smaller diameters, and with an increasing size of the diameter, deviations from the desired diameter arise to an increasingly less important extent only. Furthermore, an as high viscosity of the working fluid as possible in the fluid space is preferred.
- The system of capillaries preferably comprises a capillary running spirally, or a plurality of such capillaries. In a preferred example embodiment, the system of capillaries is formed by a single, spiral capillary. A spiral capillary not only has the advantage of a large length, but can also be simply produced. In particular, it can be formed in the form of an external or internal thread on a corresponding surface area, preferably a shell or jacket surface area, of a capillary body. The capillary body with the external or internal thread is preferably placed into or onto another body with a smooth opposite surface area, wherein care must be taken that the threads of the capillary body are sealed against each other on the opposite surface area.
- The invention will now be described by way of a preferred example embodiment. There is shown:
- FIG. 1 an infusion device in a longitudinal section;
- FIG. 2 a capillary in accordance with Detail I of FIG. 1; and
- FIG. 3 an alternative embodiment of a capillary.
- FIG. 1 shows a longitudinal section of an infusion device.
- A circular cylindrical
outer sleeve 3, together with asealing piece 9 at a proximal end and a sealingcap 19 at a distal end, forms a casing of the infusion device. A container holder 4 a is held centred in a proximal region of theouter sleeve 3. Acontainer 1 in the form of an ampoule is accommodated by the container holder 4 a, likewise centred with respect to the central longitudinal axis of theouter sleeve 3. Thecontainer 1 is filled with a product to be injected, for example insulin. A deliveringmeans 2 in the form of a delivering piston is furthermore movably accommodated by the container, in a straight line toward an outlet of thecontainer 1. Acatheter 20 is connected to the outlet of thecontainer 1 in a manner known in its own right - An
inner sleeve 4 b is arranged in a distal region of the infusion device, concentric with respect to theouter sleeve 3. In the example embodiment, the container holder 4 a and theinner sleeve 4 b are formed as a one-piece sleeve. The container holder 4 a and theinner sleeve 4 b could also be separate components. However, forming them as one piece simplifies holding them commonly centred in theouter sleeve 3, as can be directly inferred from FIG. 1 and the subsequent description. - An inner surface area of the
inner sleeve 4 b forms a slide bearing for a drivenpiston 6 accommodated by theinner sleeve 4 b, said driven piston being connected rigidly to the deliveringpiston 2 by means of apiston rod 7. The drivenpiston 6 and thepiston rod 7 are formed as one piece. Thepiston rod 7 abuts the deliveringpiston 2. It could also be firmly connected to the deliveringpiston 2; for example, it could be screwed to the deliveringpiston 2. Furthermore, thepiston rod 7 can equally be guided into a collar region between the container holder 4 a and theinner sleeve 4 b, for example guided fluid-proof. The drivenpiston 6 seals toward theinner sleeve 4 b using sealing rings 17 in the manner of piston rings. - A ring space is formed between the
outer sleeve 3 and theinner sleeve 4 b, adrive piston 5 being arranged in said ring space. Thedrive piston 5 is a ring piston which is slid back and forth, fluid-proof and tight, between theouter sleeve 3 and theinner sleeve 4 b. Sealing rings 15 are accommodated by grooves in an inner surface area of thedrive piston 5 and other sealing rings 16 are accommodated by grooves on an outer surface area of thedrive piston 5, each in the manner of piston rings. Thedrive piston 5 comprises a plane ring area on a distal front face. Thedrive piston 5 tapers toward theinner sleeve 4 b in the proximal direction. The taper is formed by means of a collar. An opposite area of the infusion device lies opposite the collar, seen in the proximal direction. The opposite area is formed by a distance piece in the form of adistance ring 9 a, which surrounds the container holder 4 a and lies loose on thesealing piece 9. - In a ring space between the
outer sleeve 3 on the one hand and the container holder 4 a and theinner sleeve 4 b on the other, apressure spring 8 is accommodated between the two opposing areas, i.e. the collar of thedrive piston 5 and thedistance ring 9 a, abutting the two areas. By varying the strength of thedistance ring 9 a, i.e. by exchanging it, the device can be simply adapted to different pressure springs 8, to continuously set the operative range of the spring optimally. - A
capillary body 10 is arranged behind thedrive piston 5 in the distal direction. Thecapillary body 10 comprises a proximal ring region and is occluded by a base at its distal end. In the region of its ring body, thecapillary body 10 is sealed fluid-proof against theouter sleeve 3 and preferably also against theinner sleeve 4 b. A distal front area of theinner sleeve 4 b pushes fluid-proof against the base of thecapillary body 10 via a sealingring 18. Thecapillary body 10 is provided with aaperture opening 14 in the region of a distal opening on the front face of theinner sleeve 4 b which is sealed by the sealingring 18. - An aperture open in one direction only is formed in the
capillary body 10 by a reflux valve. The reflux valve comprises avalve ball 11 which is pressed into its fitting within thecapillary body 10 in a known way by means of avalve spring 12. Thevalve spring 12 is in turn supported on avalve closure 13. - A fluid space is formed between the distal front area of the
drive piston 5 and a distal front area of the drivenpiston 6, said fluid space being occluded fluid-proof by said twopistons partial space 21 and a secondpartial space 22. The twopartial spaces capillary body 10. Thefluid space - The
reflux valve partial space 22 into thepartial space 21, and prevents a through-flow in the other direction. - The
capillary body 10, together with an inner surface area of theouter sleeve 3 surrounding the capillary body, forms a fluid connection in the form of a system of capillaries. The system of capillaries is shown in Detail I of FIG. 2. It is formed by a single, connected fluid channel, namely a capillary 23. The capillary 23, in the form of a multiple thread, encircles the outer surface area of thecapillary body 10 in a spiral. In principle, the capillary 23 can also be formed by a single thread. When thecapillary body 10 is installed, the capillary 23 connects the twopartial fluid spaces outer sleeve 3 opposite the capillary 23 is simply smooth. Thecapillary body 10 is guided into theouter sleeve 3 by a slight pressing power. When installed, the “teeth” on the outer surface area of thecapillary body 10, which separate the individual threads of the capillary 23 from each other, press fluid-proof against the inner surface area of theouter sleeve 3. The teeth of thecapillary body 10 are flattened for sealing purposes. Thecapillary body 10 consists of a softer material than theouter sleeve 3, in order to improve sealing. For the same purpose, however, theouter sleeve 3 could also in principle be made of a softer material than thecapillary body 10. - An alternative embodiment of a capillary23 is shown in FIG. 3. In this case, the capillary 23 is formed in one insert as a straight fluid channel. The insert is held fluid-proof in a receptacle of the capillary body. A bore which extends the capillary 23 of the insert is formed in the
capillary body 10, such that in this embodiment too, a fluid connection is provided between the twopartial spaces - By inserting a
distance ring 9 a, all deviations from the corresponding desired values arising in the transmission link from thepressure spring 8 to the drivenpiston 6 can be simply compensated for. In this way, not only differences in the pressure springs but also for example capillary defects may be compensated for by means of thedistance ring 9 a. Compensating is achieved by setting the bias of thepressure spring 8 by means of an easilyreplaceable distance ring 9 a. There are thus distance rings 9 a of various strengths for various types of devices, and when the device is being assembled, the distance ring which exhibits the optimal strength for compensating is inserted. - The functionality of the infusion device will now be described:
- In the state shown in FIG. 1, the
container 1 is filled with the product and the deliveringpiston 2 correspondingly assumes its distal position in thecontainer 1. The drivenpiston 6 also correspondingly assumes its distal position in theinner sleeve 4 b. In this distal position, the drivenpiston 6 is ideally occluded by the rear front area of theinner sleeve 4 b, in order to keep the overall length of the device as short as possible. - In this state of the device, the
partial fluid space 22 exhibits its smallest volume. Thepartial fluid space 23 correspondingly exhibits its largest volume. The drivenpiston 6 is held in its distal position either directly by the user or preferably by means of a latch. At the same time, thedrive piston 5 assumes its proximal position. In this proximal position of thedrive piston 5, thepressure spring 8 is tensed between the two areas formed by the collar area of thedrive piston 5 and thedistance ring 9 a. - For subcutaneously administering the product, an injection needle arranged at the proximal end of the
catheter 20 is inserted, and the latch on the drivenpiston 6 or thepiston rod 7 respectively is released. Under the pressure of thepressure spring 8, a fluid pressure is built up in thepartial fluid space 21 via thedrive piston 5. This fluid pressure can only be decreased by the capillary 23. Under the pressure of thedrive piston 5, fluid flows out of thepartial fluid space 21, through the capillary 23, into thepartial fluid space 22. The drivenpiston 6 is moved in the proximal direction by the pressure building in thepartial fluid space 22. Thepartial fluid space 21 thus forms a drive side and the partial fluid space 22 a driven side of thefluid space drive piston 5 facing thepartial fluid space 21, and the drive side by a piston area of the drivenpiston 6 facing thepartial fluid space 22. - In the example embodiment, a pressure reducing means is formed by the
capillary body 10, theouter sleeve 3 and the capillary 23 formed by their co-operation. A constructively determined drop in pressure is effected by said pressure reducing means. Due to the drop in pressure generated, it is possible to use astronger pressure spring 8 for driving the deliveringpiston 2 than would be possible in an unchoked drive. - Moreover, the piston area of the
drive piston 5 is larger than the piston area of the drivenpiston 6. Correspondingly, a stroke of thedrive piston 5 effects a comparatively greater stroke of the drivenpiston 6. The drivenpiston 6 in turn acts directly on the deliveringpiston 2 by means of therigid piston rod 7. Correspondingly, a complete stroke of the drivenpiston 6 corresponds to the stroke of the deliveringpiston 2. The stroke of the deliveringpiston 2 is in turn determined by the conventionally usedcontainers 1. The complete working stroke of the deliveringpiston 2, which corresponds to a complete delivery of the contents of thecontainer 1, compares with a by comparison substantially shorter working stroke of thedrive piston 5 and thus of thepressure spring 8. - The concentric arrangement of the two
partial fluid spaces overall fluid space - To drive it, the delivering
piston 2 is charged with a pressure of about one bar, i.e. it exerts such a pressure on the contents of thecontainer 1. The fluid coupling is correspondingly formed to transmit the force of thepressure spring 8 from the drive side of thefluid space outer sleeve 3, thecapillary body 10 and the capillary 23, and by the size ratio of the two piston areas of thepistons - After the product has been delivered, for example after the device has been completely emptied, the
container 1 can be re-filled to administer product again, or preferably replaced with a new, filled container. Before replacing the container, the deliveringpiston 2 is retracted by means of thepiston rod 7 to the starting position shown in FIG. 1. In the starting position, thepiston rod 7 is latched by a suitable locking means. In the course of retracting, the drivenpiston 6 pushes the fluid out of the completely filledpartial fluid space 22 into thepartial fluid space 21. In this way, the fluid flows out of the internal space of theinner sleeve 4 b, through theopening 14 in the base of thecapillary body 10, and via a small intermediate space between the sealingcap 19 and thecapillary body 10 to thereflux valve partial fluid space 22, the reflux valve opens and the fluid flows through the through-flow formed by the reflux valve and into thepartial fluid space 21. Here, the pressure of thepressure spring 8 has to be overcome to advance thedrive piston 5 in the proximal direction and ultimately into the starting position shown. The device is then ready to deliver product again. - In the foregoing description a preferred embodiment of the invention has been presented for the purpose of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Obvious modifications or variations are possible in light of the above teachings. The embodiment was chosen and described to provide the best illustration of the principals of the invention and its practical application, and to enable one ordinary skill in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the invention as determined by the appended claims when interpreted in accordance with the breadth they are fairly, legally, and equitably entitled.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Claims (12)
1. A device for administering an injectable product, comprising:
a) a casing;
b) a container for said product accommodated by said casing;
c) a delivering means for delivering product out of said container;
d) a drive means; and
e) a transmission link via which said drive means drives said delivering means;
characterised in that:
f) a fluid space for an incompressible fluid and
g) a pressure reducing means are provided in said transmission link;
h) wherein said fluid space can be impinged on a drive side by pressure from said drive means and said pressure reducing means reduces a fluid pressure generated by said drive means toward a driven side of said fluid space.
2. The device as set forth in claim 1 , characterised in that a working stroke of said drive means is transmitted in said fluid space into a working stroke of said delivering means which is greater than the working stroke of said drive means.
3. The device as set forth in the preceding claim, characterised in that a bias of said drive means is determined by a replaceably arranged distance ring.
4. The device as set forth in claim 1 , characterised in that said drive side of said fluid space is formed by a piston area of a drive piston which is larger than a piston area of a driven piston which forms the driven side of said fluid space.
5. The device as set forth in claim 1 , characterised in that said fluid space is sub-divided into a first partial space including said drive side and a second partial space including said driven side, and in that said two partial spaces are connected to each other by a fluid connection formed by said pressure reducing means.
6. The device as set forth in the preceding claim, characterised in that said two partial spaces are connected to each other exclusively by a system of capillaries, if a higher pressure prevails in said first partial space than in said second partial space.
7. The device as set forth in claim 5 , characterised in that said fluid connection includes a spiral fluid channel or is formed by the same.
8. The device as set forth in the preceding claim, characterised in that said pressure reducing means comprises a capillary body, and in that said spiral fluid channel is formed between a surface area of said capillary body and an opposite surface area.
9. The device as set forth in claim 5 , characterised in that said first partial space or said second partial space is formed as a toroidal chamber between an outer sleeve and an inner sleeve, and in that the other of said two partial fluid spaces is formed in said inner sleeve.
10. The device as set forth in the preceding claim, characterised in that:
said toroidal chamber forms said first partial space; and
a drive piston guided fluid-proof by said outer sleeve and said inner sleeve forms said drive side.
11. The device as set forth in claim 9 , characterized in that:
said second partial space is formed in said inner sleeve; and in that
a driven piston guided fluid-proof by said inner sleeve forms said driven side.
12. The device as set forth in claim 9 , characterized in that:
said pressure reducing means comprises a separating body which forms a front face of said toroidal chamber and which separates said two partial fluid spaces from each other;
a valve is accommodated by said separating body, said valve only allows a flow of fluid from said driven side to said drive side of said fluid space; and in that
said separating body forms said fluid correction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/720,985 US20040143217A1 (en) | 1999-08-18 | 2003-11-24 | Device for administering an injectable product |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19939023A DE19939023A1 (en) | 1999-08-18 | 1999-08-18 | Device for administering an injectable product |
DEDE19939023A1 | 1999-08-18 | ||
PCT/CH2000/000390 WO2001012250A1 (en) | 1999-08-18 | 2000-07-18 | Device for the administration of an injectable product |
US10/077,229 US6736795B2 (en) | 1989-08-18 | 2002-02-15 | Device for administering an injectable product |
US10/720,985 US20040143217A1 (en) | 1999-08-18 | 2003-11-24 | Device for administering an injectable product |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/077,229 Continuation US6736795B2 (en) | 1989-08-18 | 2002-02-15 | Device for administering an injectable product |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040143217A1 true US20040143217A1 (en) | 2004-07-22 |
Family
ID=7918703
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/077,229 Expired - Lifetime US6736795B2 (en) | 1989-08-18 | 2002-02-15 | Device for administering an injectable product |
US10/720,985 Abandoned US20040143217A1 (en) | 1999-08-18 | 2003-11-24 | Device for administering an injectable product |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/077,229 Expired - Lifetime US6736795B2 (en) | 1989-08-18 | 2002-02-15 | Device for administering an injectable product |
Country Status (8)
Country | Link |
---|---|
US (2) | US6736795B2 (en) |
EP (1) | EP1210136B1 (en) |
JP (1) | JP4274725B2 (en) |
AT (1) | ATE316393T1 (en) |
AU (1) | AU5669800A (en) |
DE (2) | DE19939023A1 (en) |
ES (1) | ES2256018T3 (en) |
WO (1) | WO2001012250A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080125727A1 (en) * | 2006-08-30 | 2008-05-29 | Alexander Seibold | Apparatus for the administration of a fluid product |
US7559926B1 (en) * | 2003-01-13 | 2009-07-14 | Advanced Neuromodulation Systems, Inc. | Actuation system and method for an implantable infusion pump |
US7914499B2 (en) | 2006-03-30 | 2011-03-29 | Valeritas, Inc. | Multi-cartridge fluid delivery device |
US8070726B2 (en) | 2003-04-23 | 2011-12-06 | Valeritas, Inc. | Hydraulically actuated pump for long duration medicament administration |
US9089636B2 (en) | 2004-07-02 | 2015-07-28 | Valeritas, Inc. | Methods and devices for delivering GLP-1 and uses thereof |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10116778A1 (en) * | 2001-04-04 | 2002-10-17 | Roesch Ag Medizintechnik | injection device |
DE10233622A1 (en) * | 2002-07-24 | 2004-02-12 | Disetronic Licensing Ag | Infusion pump, method, control program and semiconductor component for the metered administration of a medical liquid |
DE10340586A1 (en) * | 2003-09-03 | 2005-04-07 | Tecpharma Licensing Ag | Mixing device for multi-chamber ampoule |
WO2005058392A2 (en) | 2003-12-18 | 2005-06-30 | Novo Nordisk A/S | Cartridge for delivery device |
US20050215850A1 (en) * | 2004-03-29 | 2005-09-29 | Ronnie Klein | Syringe pump |
CH699723B1 (en) * | 2005-04-25 | 2010-04-30 | Tecpharma Licensing Ag | A device for administering a fluid product. |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4437859A (en) * | 1981-08-03 | 1984-03-20 | Drs Infusion Systems, Inc. | Hydraulic syringe drive |
US4773900A (en) * | 1986-08-20 | 1988-09-27 | Cochran Ulrich D | Infusion device |
US4773419A (en) * | 1985-09-12 | 1988-09-27 | Scanlan International, Inc. | Method and apparatus for limiting blood flow to a distal portion of an extremity |
US5380279A (en) * | 1994-03-11 | 1995-01-10 | The Upjohn Company | Animal vaccination gun |
US5788673A (en) * | 1995-06-05 | 1998-08-04 | Atrion Medical Products, Inc. | Drug infusion system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5312335A (en) * | 1989-11-09 | 1994-05-17 | Bioject Inc. | Needleless hypodermic injection device |
JPH05245197A (en) * | 1992-03-03 | 1993-09-24 | Kobayashi Pharmaceut Co Ltd | Implement for continuous injection of chemical liquid |
DE19614337A1 (en) * | 1996-02-05 | 1997-08-07 | Lang Volker | Assembly for infusion therapy |
-
1999
- 1999-08-18 DE DE19939023A patent/DE19939023A1/en not_active Withdrawn
-
2000
- 2000-07-18 JP JP2001516592A patent/JP4274725B2/en not_active Expired - Fee Related
- 2000-07-18 ES ES00941864T patent/ES2256018T3/en not_active Expired - Lifetime
- 2000-07-18 AU AU56698/00A patent/AU5669800A/en not_active Abandoned
- 2000-07-18 EP EP00941864A patent/EP1210136B1/en not_active Expired - Lifetime
- 2000-07-18 DE DE50012131T patent/DE50012131D1/en not_active Expired - Lifetime
- 2000-07-18 WO PCT/CH2000/000390 patent/WO2001012250A1/en active IP Right Grant
- 2000-07-18 AT AT00941864T patent/ATE316393T1/en active
-
2002
- 2002-02-15 US US10/077,229 patent/US6736795B2/en not_active Expired - Lifetime
-
2003
- 2003-11-24 US US10/720,985 patent/US20040143217A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4437859A (en) * | 1981-08-03 | 1984-03-20 | Drs Infusion Systems, Inc. | Hydraulic syringe drive |
US4773419A (en) * | 1985-09-12 | 1988-09-27 | Scanlan International, Inc. | Method and apparatus for limiting blood flow to a distal portion of an extremity |
US4773900A (en) * | 1986-08-20 | 1988-09-27 | Cochran Ulrich D | Infusion device |
US5380279A (en) * | 1994-03-11 | 1995-01-10 | The Upjohn Company | Animal vaccination gun |
US5788673A (en) * | 1995-06-05 | 1998-08-04 | Atrion Medical Products, Inc. | Drug infusion system |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7559926B1 (en) * | 2003-01-13 | 2009-07-14 | Advanced Neuromodulation Systems, Inc. | Actuation system and method for an implantable infusion pump |
US9072828B2 (en) | 2003-04-23 | 2015-07-07 | Valeritas, Inc. | Hydraulically actuated pump for long duration medicament administration |
US8070726B2 (en) | 2003-04-23 | 2011-12-06 | Valeritas, Inc. | Hydraulically actuated pump for long duration medicament administration |
US9125983B2 (en) | 2003-04-23 | 2015-09-08 | Valeritas, Inc. | Hydraulically actuated pump for fluid administration |
US9511187B2 (en) | 2003-04-23 | 2016-12-06 | Valeritas, Inc. | Hydraulically actuated pump for fluid administration |
US10525194B2 (en) | 2003-04-23 | 2020-01-07 | Valeritas, Inc. | Hydraulically actuated pump for fluid administration |
US11642456B2 (en) | 2003-04-23 | 2023-05-09 | Mannkind Corporation | Hydraulically actuated pump for fluid administration |
US9089636B2 (en) | 2004-07-02 | 2015-07-28 | Valeritas, Inc. | Methods and devices for delivering GLP-1 and uses thereof |
US7914499B2 (en) | 2006-03-30 | 2011-03-29 | Valeritas, Inc. | Multi-cartridge fluid delivery device |
US8361053B2 (en) | 2006-03-30 | 2013-01-29 | Valeritas, Inc. | Multi-cartridge fluid delivery device |
US8821443B2 (en) | 2006-03-30 | 2014-09-02 | Valeritas, Inc. | Multi-cartridge fluid delivery device |
US9687599B2 (en) | 2006-03-30 | 2017-06-27 | Valeritas, Inc. | Multi-cartridge fluid delivery device |
US10493199B2 (en) | 2006-03-30 | 2019-12-03 | Valeritas, Inc. | Multi-cartridge fluid delivery device |
US20080125727A1 (en) * | 2006-08-30 | 2008-05-29 | Alexander Seibold | Apparatus for the administration of a fluid product |
Also Published As
Publication number | Publication date |
---|---|
DE19939023A1 (en) | 2001-02-22 |
US6736795B2 (en) | 2004-05-18 |
EP1210136B1 (en) | 2006-01-25 |
JP2003507093A (en) | 2003-02-25 |
EP1210136A1 (en) | 2002-06-05 |
JP4274725B2 (en) | 2009-06-10 |
ATE316393T1 (en) | 2006-02-15 |
WO2001012250A1 (en) | 2001-02-22 |
AU5669800A (en) | 2001-03-13 |
ES2256018T3 (en) | 2006-07-16 |
US20020111589A1 (en) | 2002-08-15 |
DE50012131D1 (en) | 2006-04-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2930201B2 (en) | Stopper assembly with bypass for use in a multi-chamber syringe barrel | |
AU2008246210B2 (en) | Loading mechanism for infusion pump | |
RU2134592C1 (en) | Device for controlled feed of liquids | |
US6053893A (en) | Device for the dosed release of an injectable product | |
JP3223684B2 (en) | Chemical injection device | |
JP4263171B2 (en) | Administration device with priming function | |
US4612010A (en) | Infiltration pump | |
US6019747A (en) | Spring-actuated infusion syringe | |
FI106535B (en) | Apparatus for controlled distribution of liquids | |
US20040143217A1 (en) | Device for administering an injectable product | |
CA2239515C (en) | Spring-actuated needleless injector | |
US7267668B2 (en) | Disposable syringe and cartridge with pneumatic chamber | |
JP2007509726A (en) | Injection device for injectable preparations | |
NO332994B1 (en) | Pneumatically operated auto injector | |
EP1146922A1 (en) | Spring-powered infusion pump | |
JP2010188167A (en) | Automatic injection device with reset feature | |
JPH10512165A (en) | Medical infusion system with gas spring | |
CN105879159A (en) | Reusable injector and working method thereof | |
KR20010075078A (en) | Needleless injector cartridge | |
JPH06190038A (en) | Subcutaneous syringe | |
CN101437560A (en) | Syringe device comprising a motor adapted for filling an injection chamber | |
JPH02185261A (en) | Syringe | |
US9132262B2 (en) | Applicator for dispensing a medicinal substance | |
WO2018054183A1 (en) | Split micro-valve | |
US20230087224A1 (en) | Adjustable Dose Needleless Injector |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROCHE DIAGNOSTICS INTERNATIONAL AG,SWITZERLAND Free format text: MERGER;ASSIGNOR:DISETRONIC LICENSING AG;REEL/FRAME:024244/0692 Effective date: 20090508 Owner name: ROCHE DIAGNOSTICS INTERNATIONAL AG, SWITZERLAND Free format text: MERGER;ASSIGNOR:DISETRONIC LICENSING AG;REEL/FRAME:024244/0692 Effective date: 20090508 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |