EP0444516B1

EP0444516B1 - Stick type vacuum cleaner

Info

Publication number: EP0444516B1
Application number: EP19910102452
Authority: EP
Inventors: Marco Ferrari; Michael R. Fowler; Kelly Mcvey
Original assignee: White Consolidated Industries Inc
Current assignee: White Consolidated Industries Inc
Priority date: 1990-03-01
Filing date: 1991-02-20
Publication date: 1994-11-30
Anticipated expiration: 2011-02-20
Also published as: CA2023347A1; DE69105299D1; ES2064781T3; EP0444516A3; JPH04220222A; EP0444516A2; DE69105299T2

Description

The present invention relates to a stick type vacuum cleaner having a porous filter bag and a re-usable dirt cup, the latter being for accumulating dirt picked up from the rug, or the like, during the vacuuming operation.

BACKGROUND OF THE INVENTION

Stick type vacuum cleaners are known in which each of the cleaners is provided with a vacuum pump, a dirt tube and a porous bag for receiving the dirt entrained in the air stream and conducting the dirt into a reusable dirt cup that is attached to the housing of the vacuum cleaner. Such an arrangement is shown in U.S. Patent No. 3,199,138 to Nordeen which corresponds to the preamble of claim 1.
However, in the prior art stick type vacuum cleaners the handles are not adapted for multiple uses and, for example, it is difficult to vacuum stairs with such a device since it is elongated and if it is held vertically both the stairs and the risers cannot be adequately cleaned. DE-A-34 30 402 discloses a handle having two grasping portions such as the claimed invention. However it does not disclose a grip on the lower housing, so that this vacuum cleaner can be used in an upright position and in a horizontal position but not for above-floor operations as intended by the claimed invention Consequently, it is an object of the present invention to provide a two position handle for a stick vacuum cleaner which can be used in one position for up-right cleaning and in another position for above-floor cleaning operations and for substantially horizontal cleaning in conjunction with a molded-in handle on the lower housing of the cleaner. Thus, stairs and risers can be adequately vacuumed.
The present vacuum cleaner is a light-weight, up-right construction and includes a vacuum motor for drawing dirt laden air into a housing, and discharging the dirt into a dirt cup as the air passes through a porous filter bag.
It is another object of the present invention to provide a support beam, or post, for a vacuum cleaner bag, which is connected to the lower housing at one end and a handle at the other end, which is disposed outside of said bag and the dirt cup.
It is an object of the present invention to provide an integral molded-in hand hold in the lower housing of the vacuum cleaner for assisting in the lifting of the nozzle of the vacuum cleaner during stair cleaning operation.
The invention is disclosed in the characterizing part of claim 1 in connection with the preamble of the claim itself.

BRIEF DESCRIPTION OF THE DRAWINGS

In order that the invention be more clearly understood, it will now be disclosed in greater detail with reference to the accompanying drawings, wherein:

Fig. 1 is a side elevation view of the stick vacuum cleaner constructed in accordance with the teachings of the present invention.
Fig. 2 is a cross-sectional view the device shown in Fig. 1.
Fig. 2a is an alternate embodiment of the dirt tube location in the present invention.
Fig. 3 is a substantially perspective view of the stick vacuum cleaner in use on a floor or floor covering.
Fig. 4 is a rear elevation view of a vacuum cleaner shown in Fig. 3.
Fig. 5 is an enlarged side elevational view of the handle portion of the vacuum cleaner.
Fig. 6 is a cross-sectional view of the handle shown in Fig. 5.
Fig. 7 is a perspective of the stick vacuum cleaner shown in a substantially horizontal position for vacuuming stairs or the like.
Fig. 8 is an enlarged fragmentary exploded view of the invention showing the dirt cup removed from the device and also showing the motor housing and porous filter bag.
Fig. 9 is a bottom plan view of the nozzle for the stick vacuum cleaner showing the bristle strip, as well as the wheel assembly.
Fig. 10 is a rear view of the nozzle shown in Fig. 9.
Fig. 11 is a side elevational view thereof.
Fig. 12 is a top plan view of another embodiment of the nozzle incorporating a foot pedal switch.
Fig. 13 is a bottom plan view thereof.
Fig. 14 is a side elevation thereof.
Fig. 15 is a top plan view showing the foot pedal switch of the embodiment shown in Fig. 9.
Fig. 16 is a top plan view of the dirt cup for the stick vacuum cleaner.
Fig. 17 is a front elevational view thereof.
Fig. 18 is a view taken along the lines 18-18 of Fig. 17,
Fig. 19 is a sectional view taken along the lines 19-19 of Fig. 16.
Fig. 20 is a front elevational view of the latch device which is movable within the dirt cup for securing and releasing the dirt cup from the vacuum cleaner.
Fig. 21 is a side elevational view thereof.
Fig. 22 is a rear elevational view of the latch shown in Fig. 20.
Fig. 23 is a view taken along the lines 23-23 of Fig. 22.
Fig. 24 is a view taken along the lines 24-24 of Figs. 22 and
Fig. 25 is a view taken along the lines 25-25 of Fig. 22.

DESCRIPTION OF THE PREFERRED EMBODIMENT

The lightweight stick type vacuum cleaner, as seen in Figs. 1-4 is provided with a lower housing 10 having a tubular extension 12 and the nozzle 14 pivotally attached to the extension 12 at pivot point 16. As seen in Fig. 2, an electric motor 18 and an impeller fan 20 are mounted in the lower housing 10 forming a vacuum pump for the cleaner. A dirt tube 22 is also provided for conducting air-entrained dirt into a porous filter bag 24.
The lower housing is connected to the upper handle assembly 26 by means of a cylindrical handle tube 28 located behind the porous bag and removable dirt cup 30. Consequently, dirt-laden air which enters the vacuum cleaner device through the opening 14a in the nozzle moves through the dirt tube 22 and exits into the bottom of the porous cloth filter bag 24, and thereafter the air-entrained dirt falls by gravity into the dirt cup 30, while the air flow continues up into the filter bag 24 and out to the atmosphere through the minute openings of the filter bag. However, sometimes in use, some dirt and debris clings to the inside of the porous bag 24 and is removed by means of a bag shaker 32 having a lower ring 34 attached to the top of the filter bag 24. The bag shaker 32 is provided at its upper end with a pair of springs 36, each being attached at one end to the shaker mechanism 32 and at the other end to the handle assembly 26.
It should be noted that the handle assembly is in the form of a closed loop provided a void 38 for inserting the fingers of the hand therethrough.
Referring particularly to Figs. 5 and 6 showing the handle portion 26 of the vacuum cleaner which has a two-position hand grip, in which one hand grip portion 39 is substantially linear, and in which a second handle portion 40 is integral with the hand grip portion 39, and is at an obtuse angle thereto. Thus, the user/operator of the vacuum cleaner will use the handle portion 40 when the cleaner is held at an angle for cleaning floors and floor coverings, as seen in Fig. 3, and the handle portion 39 is utilized when vacuuming stairs and risers, as seen in Fig. 7. In order to make the vacuuming of stairs and risers easier to accomplish a hand-hold 42 is provided in lower housing 10 which particularly utilizes the construction, seen in Fig. 7, as well as in Figs. 1-3.
As illustrated in Fig. 2, the handle 26 is provided with a reduced cylindrical insert 27 which fits within an end 29 of the cylindrical handle tube 28 which connects the lower housing to the handle assembly.
At the bottom of the handle 26 is a cord retainer 43 while at the top of handle 26 is mounted a cord retainer 44, for wrapping the electric power cord when not in use. As further seen in Figs. 5 and 6, the hand grip portions 39 and 40 are shaped for gripping the selected handle portion without the operator's hand slipping out of position.
An alternate embodiment of the present invention is illustrated in Fig. 2a showing the dirt tube 22a extending behind the dirt cup 30 and entering the porous filter bag 24a at an intermediate portion thereof, or at top of the bag. In this construction, the dirt tube functions not only to conduct the dirt-laden air into the filter bag but also acts as the connecting support member between the lower housing 10 and the handle assembly.
The nozzle of the present stick vacuum cleaner is provided with a small wheel assembly 50 as shown in Figs. 9-13. The nozzle opening 52 is provided with a bristle strip 54, as clearly seen in Figs. 9 and 10. In addition, the nozzle housing 56 has an opening 58 through which a rocker foot pedal 60 projects, as shown in Figs. 10.
The embodiment shown in Figs. 12-14 is provided with large nozzle propelling wheels 62 for ease in movement of the nozzle head. Pivotally secured to the nozzle casing 56 is an elbow 64 for insertion within the tubular extension 12 of the lower housing 10, as particularly seen in Fig. 2. As seen in Fig. 13 the alternate embodiment of the nozzle construction is provided with a bristle strip 68 in the opening 70 of the nozzle housing 72.
A removable dirt cup 30 is illustrated in Figs. 8 and 16-19, and which is adapted to be inserted in the opening 33 between the hand hold 42 and the porous cloth bag 24, (Fig. 8). The dirt cup 30 is provided with a latch assembly referred to generally by the reference numeral 76, and particularly shown in Figs. 20-25 of the drawings. As seen in Fig. 8 the dirt cup has a keyway 35 in the bottom thereof for accommodating the latch assembly 76, and a track 37 on the top surface of the lower housing 10. The latch assembly 76, in addition, is provided with somewhat flexible legs 78 having end hooks 80. Furthermore, the latch assembly 76 is provided with an element 82 having slightly flexible finger pieces 84, as well as a cam 86 on the bottom of the latch. The latch assembly 76 fits within the dirt cup 30 and has limited movement therein but cannot be removed therefrom. Consequently, when it is desired to install the dirt cup 30 within the opening between the lower motor housing and cloth dirt bag, the cup 30 is pushed into the opening and slides on the track 37 on the lower housing 10 and the cam 86 located on the bottom of the latch wedges against the lower housing of the vacuum cleaner thus locking the dirt cup in place on the stick vacuum. Since the latch assembly 76 moves freely with limited movement within the dirt cup the latter can be removed by squeezing the latch finger pieces 84 and pulling out the latch assembly whereby the cam 86 is released from the lower housing. The latch assembly, however, cannot be separated from the dirt cup since it is retained within the cup by the end hooks 80 of the legs 78 being retained in the keyways 35 of the dirt cup 30.
Fig. 19 shows the latch assembly 76 fully inserted within the keyway 35 of the dirt cup 30. It will again be noted that when the dirt cup 30 is pushed in the opening 33 and assumes the position shown in Fig. 2 the cam 86 of the latch assembly 76 is forced into engagement with the top surface of the lower housing 10 thereby maintaining the dirt cup into a latched position in the open space 33 between the bottom of the porous cloth bag 24 and the top of the lower housing 10.
As seen in Fig. 2, the dirt cup is provided with an open top 30a communicated with the porous bag 24 in order to permit the free fall of air-entrained dirt into the dirt cup 30. Furthermore, as stated above, the dirt cup 30 can be removed from the stick vacuum cleaner by grasping the finger pieces 84 on the latch assembly 76 and pulling the latch in a direction out of the dirt cup a limited distance thereby causing the cam 86 to be dislodged from engagement with the top surface of the lower housing 10.
As seen in Figs. 1-6 an on/off switch 95 is shown which is connected to a power source (not shown) and which is provided in the handle 26 for operating the present stick vacuum cleaner.

Claims

An upright stick-type vacuum cleaner having a lower housing (10), a nozzle (14) movably attached to said lower housing (10), a handle (26), a support member (28) connecting said lower housing (10) to the handle (26), a vacuum pump located in the lower housing, a porous bag (24), a dirt cup (30) and a dirt tube (22) for conducting dust and dirt laden air whereby said dust and dirt is deposited in said dirt cup (30), while the air passes through said porous bag (24) to the atmosphere,
characterized by a hand grip (42) on said lower housing (10), said handle (26) being loop-shaped and having one handle portion (39) essentially in parallel with the longitudinal axis of the stick-type vacuum cleaner and a second handle portion (40) being integral with the first handle portion (39) and at an obtuse angle thereto, whereby the two handle portions are designed to be alternately grasped, the second portion (40) being for upright cleaning operation of the vacuum cleaner and the first portion (39) together with said hand grip (42) being for above-floor cleaning operation of the vacuum cleaner.
The vacuum cleaner as claimed in claim 1 wherein said support member (28) is an elongated rigid element that is located outside of said porous bag (24) and said dirt cup (30).
The vacuum cleaner as claimed in claim 1 wherein the dirt cup (30) has a finger-operated latch (76) fixedly mounted for restricted movement on the bottom of said dirt cup (30), said latch (76) having a cam (86) for frictional engagement between the bottom of the dirt cup and a top surface of said lower housing when said dirt cup (30) is inserted in said vacuum cleaner.
The vacuum cleaner as claimed in one of the previous claims, wherein said dirt tube (22) is connected to the bottom of said porous bag (24).
The vacuum cleaner as claimed in one of the previous claims, wherein said support member (28) is a cylindrically-shaped tube and said handle (26) is provided with a cylindrical post (27) for insertion in said support member (28) to thereby assemble said vacuum cleaner.
The vacuum cleaner as claimed in one of the previous claims, wherein said loop shaped handle (26) has a handle gripping portion provided with a first handle gripping section (39) and an integral second hand gripping section (40) angularly disposed relative thereto.
The vacuum cleaner as claimed in one of the previous claims, wherein said dirt tube (22) is connected to said porous bag (24) at a location above the lower end thereof.
The vacuum cleaner as claimed in one of the previous claims, wherein said dirt cup (30) is removable from the lower housing (10) without removing the porous bag (24).
The vacuum cleaner as claimed in one of the previous claims, wherein the movement of the latch (76) is restricted by the latch being retained within keyways (35) on the bottom of the dirt cup (30).
The vacuum cleaner as claimed in one of the previous claims characterized by a shaker (32) having an actuating portion extending into the loop-shaped handle (26) and connected to the porous bag (24) whereby the porous bag (24) can be shaken by the actuating portion in the handle (26).
The vacuum cleaner as claimed in claim 10, wherein the shaker (32) is mounted in the support member (28).
The vacuum cleaner as claimed in claim 11, wherein the shaker (32) is connected to the top of the porous bag (24) and the actuating portion extends into the lower end of the handle (26).
The vacuum cleaner as claimed in claim 12, wherein the actuating portion is located above the top of the porous bag.