CA2012128A1 - Wheelchair lift - Google Patents
Wheelchair liftInfo
- Publication number
- CA2012128A1 CA2012128A1 CA 2012128 CA2012128A CA2012128A1 CA 2012128 A1 CA2012128 A1 CA 2012128A1 CA 2012128 CA2012128 CA 2012128 CA 2012128 A CA2012128 A CA 2012128A CA 2012128 A1 CA2012128 A1 CA 2012128A1
- Authority
- CA
- Canada
- Prior art keywords
- frame
- base frame
- arms
- support
- load supporting
- 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
Classifications
-
- 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
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/104—Devices for lifting or tilting the whole wheelchair
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Handcart (AREA)
- Invalid Beds And Related Equipment (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A wheelchair support and elevating apparatus comprising a lower or base frame, an upper, load supporting frame, elevating means interconnecting the base frame and the load supporting frame, motor means for actuating the elevating means to raise the upper, support frame to elevated positions with respect to a support surface, means for tilting the load supporting frame about a horizontal axis, means for rotating the load supporting frame about a vertical axis and means for stabilizing the lower or base frame.
A wheelchair support and elevating apparatus comprising a lower or base frame, an upper, load supporting frame, elevating means interconnecting the base frame and the load supporting frame, motor means for actuating the elevating means to raise the upper, support frame to elevated positions with respect to a support surface, means for tilting the load supporting frame about a horizontal axis, means for rotating the load supporting frame about a vertical axis and means for stabilizing the lower or base frame.
Description
2 ~ 2 ~
~ L5~R LI~T
Fi~ Qf t~e~ ~YQn~iQn This invention pertains to lifting devices and in particular to a wheelchalr lifting dev.ice that is compact and easily portabls and which allows for the elevation, rotation and tilting of a wheelchair and it~ occupant.
BackqrQun~ ~f the Invent.ion Transportation and access to various services such as physicians, dentists, barbers, etc. pose serious difficulties for handicapped persons confined to wheelchalrs. Specifically, the transfer of the person from whe 81 chair to examination table, ox denti~t chair, is a proce~s requiring a great deal of efort. To aid in the situation, numerous wheelchair lift devices have been developed ~or providing the denti t (for example~ access to the non-ambulatory person, eliminating the need for transfer of the person out of the wheelchair.
For example, Rachman disaloses a portable whselchair tilting device in U.S. Patent No. 4,830,5~7 (is~ued May 16, 1989); however, in this device raising an~ rotating of the wheelchair i~ not possible. ~ 61~, Similarly in U.S. Patent No. 4,759,684 tissued July 26l 1988) ~anzillotta et al disclo~e a wheelchair lift device which raises, rotate6 and tilts th~ wheelchair.
Although the device disclosed by ~anzillotta et al is similar in function to the present invention, it differg ~n that it is not portable.
Prior art in the field of wheelchair lift devices is relatively exten~ive. In addition to the devices disclosed in the aforementioned patents, other similar device have also been developed, for example:
McConnell, U.S. Patent No. 4,790,716 tissued December 13, 1988);
2~ 2~
McConnell, U.S. Patent No. 4,726,730 (issued February 23, 1988);
Peterson, U.S. Patent No. 4,192,549 (is~ued March 11, 1980);
Norton, U.S. Patent No 4,561,823 (i.ssued December 31, 1985);
McConnell, U.S. Patent No, 4,592,695 (issued June 3, 1986);
Zimmerman et al, U.S. Patent No. 4,725,188 (issued February 16, 1988); and Rachman, U.S. Patent No. 3,476,404 (issued November 4, 1969).
Qf the Inve-nti-on The present invent~on addresses the above-describad problems of oonventional wheelchair lifting devioes and provides a means for supporting and raising a wheelchair and which, once raised, can bs rotated or tilted as required. The device inclu~es a base frame and a support or lifting frame on which support tracks are attached.
wheelchair is wheeled on to the ~upport tracks and a lifting mechanism interconnea~ing the base frame and lifting fram0 i8 actuated by ~uitable motor means to raise and lower the lifting or ~upport frame and the wheelchair and occupant thereon. The base frame is pxovided with means ~or 6~abilizing tha a~6embly to inhibit tipping of the device once the wheelchair is in a raised position.
According to a broad aspect the invention relates to a wheelchair support and elsvating apparatu~ comprising a lower or base frame, an upper, load supportin~ ~rame, elevating mean6 interconnecting said base frams and said load supporting frame, motor means fsr actuating said elevating means to raise said upper, support frame to ~2~8 elevated positions with respect to a support surface, means for ti.lt.iny 6aid load supporting frame about a horizontal axis, means or rotating said load fiupporting frame about a vertical axis and means for stabilizing said lower or base frame.
Brief Descr.iptiQn of ~ e Drawinqs The invention i6 illustrated by way of example in the accompanying drawings in which:
FIGURE 1 is plan view of the assembly;
FIGURE 2 i~ an elevation view in section as seen from the lines 2-2 of Figure 1;
FIGURE 3 i~ fragmentary end elevation Vi2W;
FIGURE 4 is a per~pective view of the assembly in a raised position; and FIGURE 5 is a fragmentaxy, perspective view of a portion of the support frame.
Descxiption of the.Prefçrred Embodjiment Referring to the drawings, the wheel chair lift assembly is indicated generally at 10 and includes a lower o.r base frame 12 and an upper, moveable frame 14.
Briefly, it will seen from Figure 2 that the upper frame 14 iB connected to the lower frame 12 by means of two pairs of arms 16, 18, which, when moved from a horizontal position (Figure 3) to intermediate and uppermost positions (Figures 2 and 4) serve to elevate the upper frame 14 from the ba~e frame.
Base frame 12 comprises an elongated, trough-like structure formed by a bottom wall 20, side wall~ 22 and 24 and end wall6 provided by lateral stabili~er6 26 and 28 respectively. As 6een in Figureæ 1 and 4, stabilizer 28 is itself of box-like configuration including side wall~ 30 and 32 and is of a size sufficient to - ~ -accommodate motor means indicated generally at 3~ for actuating the mechanism to rai6e and lower the upper frame 14. It will also be noted that stabilizer 28 includes suitable rollers or wheels 36 and that 5 stabilizer 26 at the other end of the assembly includes a tongue 38. It will be understood that tongue 38 allows for the connection of a suitable form of towing means which may be utilized to lift the tongue end of the assembly and, due to the provision of the rollers 36, the assembly can be easily moved about.
The upper frame 14 i6 the member of the assembly which is moved fxom a lower, rest position to an upper, raised position as shown in Figure 4, and upper frame 14 carries the full load of a wheel chair or the like and its occupant.
Frame 14 comprises a central portion 40 preferably constructed of high trength alloy rectangular tubing and is of elongated rectangular configuration having side rails 42, 44, spaced and interconnected by cross members 46, 48 and 50 as shown in Figures 1 and 2. Cross members 46 and 50 include downwardly and outwardly extending leg members 52, 54 which are provided at their lower ~erminal ends with laterally extending tubular mambers 56 and 58 respectively.
As seen clearly in Figurs l, the upper frame 14 supports a pair of spaoed parallel elongated traoks 60 and 62. These tracks receive the wheels of a wheelchair and each track is wide enough to accommodate some deviation of line when a wheelchair is being run on to the track~ when the frame 14 i8 at the lowermost or ground level as sesn in Figure 3. Each track 60, 62 has short side walls 64 and end walls 66 as well as a rectangular opening 68 adjacent the entrance end of the tracks. It will be evident that the large wheels of a wheelchair drop lnto the openings 68 when the upper frame 14 is raised above ground level and this prevents the wheelchair from moving fore and aft on the tracks 60, 6~.
In order to adjust the l.ifting frame 14 to accommodate wheelchairs of varying track widths, tracks 60 and 62 are adjustably mounted to the leg6 52, 54 of frame 40. As shown in Figures 1 and 5, tracks 60 and 62 are each provided with a pair of inwardly extending arms 70, 72 respectively and these arms are accommodated in the tubular members 56 and 58 at ths lower encls o arms 52 and 54 as shown and are secured therein by mean~ of suitable ret:a.ining means such as wing nutc 74, 76 or the equivalent. It would be appreciated that by loosening off the winy nuts the tracks 60 and 62 can be mo~ed toward or away from one another to accommodate the various tracX widths of wheel chairs of different sizes.
Turning now to Figures 2 and 3, apparatus is provided for rai~ing and lowering the upper frame 14 and for maintaining that frame in a desired position with respect to the lower or base frame, 12. Thi~ apparatus includes the arms 16 and 18 which are plvotally connected at their lower ends to front and rear captive nuts 78 and 80 which are located in the lower, base frame 12 by means of longitudinally extending guide rods 82 and 84 which are secured at their ends to the ~tabilizer end~ of the base frame 12.
A6 shown in Figures 1 and 2, the motor means 34 is connected to an elongated shaft 86 located in the lower or base frame 12 hetween the guide rod~ 82 and 84. The motor means is connected to shaft 86 through a suitable coupling means 88 (Figure 2) and shaft 86 i8 threaded throughout its length and is engaged thereby in the oaptive nuts 78 and 80 in the base frame 12, It will be . 2 ~
understood that rotation of the threaded shaft 86 by the motor means 34 will cause the captive nuts 78, 80 to be either drawn towards one another thereby raising the upper frame 14 through the ackion of the interconnecting arms 16 and 18 or moved away ~rom one another towards the ends of the lower ~rame 12 to effectively lower the fxame 14.
Upper frame 14 is carried by a support assembly indicated generally at 90 in Figure 2. Assembly 90 includes a connector block 92 to which the upper ends of arms 16 and 18 are connected by means of pivot pins 94, the upper ends cf arms 16 and 18 having meshing gearea portions 96, as shown, ~o that the arms act in unison in raising and lowering functions.
Connector block 92 includes a vertically oriented central shaft 98 which a rsduced diameter spindle 100.
Shaft 98 is provided with a thrust bearing 102 which takes the load of a pivot block 104 mounted thereon and block 104 is mounted for rotation on spindle 100 by means a suitable bearing 106. Block 104 i~ retained in position on the ~haft 98 and spirldle 100 by means of a hold down nut and washer llO.
A top plate 112 is secured to a sleeve 114 ~hich i8 mounted on a pivot pin 116 secur~d in a channel 118 of blook 104. The members 42, 44 of top frame 14 are then sscured, preferably d~tachably so, to the plate 112 to complete the support assembly 90.
It will be apparent that with the above mentioned connection of the upper frame 14 to plate 112 that frame 14 can be tilted upwardly with respect to the unit by means of the pivot pin 116 in the sleeve 114.
Additionally, through the provisions of bearings 106 and 102, upper frame 14 can be rota~ed on a horizontal plane with respect to the lower, base frame 12 and, in order to J ~ 2 8 retain the upper frame 14 in several positions in such a horizontal plane, block 92 may be provided with a series of indentations (not shown) to receive a ball detent 120 hiased to a retaining position by mean~ of a suitable spring 122 located in the body of block 104.
In operation, the upper frame i6 located at a ground or support level as shown in Figure 3. ~ wheelchair and its occupant is moved on to the track 60 and 62 until the main wheelfi of the wheelchair are located over the openings 58. The motor means 34 is then actuated to rotats the threaded shaft 86 drawing the captive nuts 78 and 80 toward one another, effecting i~ward movement of the lower ends of arms 16 and 18 thareby raising the support assembly 90 and the upper frame 14 with the wheelahair and its occupant thereon. When the desired elevation is reached, the upper frame can be rotated to the desired orientation and tiltea rearwardly if so de~ired.
~hs fact that the lifting device of this invention is so aasily storable and portable is a most important feature. In its lower, inoperative position the assembly is quite low in elevation and, when placed on its edge and utilizing caster wheel 25 and fixed trailing wheels 27 mounted on end wall 30, it can be easily ~tored in a ~5 closet or coat rack area of a home or that of a physician's or dentist's office, barber shop, hairdresser shop or the like and from which it can quickly be removed to accommodate a patiant or client who is wheelchair-conf i ned.
Additionally, the unit can easily fit into the trunk or rear seat area of most vehicles.
A small lightweight towing handle 39 can be snapped onto the tongue or hitch 38 and, with the stabilizer legs and feet 29 moved to an upper position, the assembly, with a wheslchalr and occupant in place on the upper ~ 2 ~
frame 14 can be easily and quickly manoeuvred to a desired location.
Nhile the invention has been described in connection with a speci.fic embodiment thereof and in a 6pecific use, various modifications thereof will occur to those skilled in the art without departing from the spirit and sc~pe of the inventlon as set forth in the appended claims.
The terms and expressions which have been employed in this specification are used as terms of description and not of limitations, and there is no intention in the use of such terms and expression6 to exclude any equivalents of the features shown and described or portions thereof, but it is recognized that various modifications are possible within the scope of the invention claim6.
~ L5~R LI~T
Fi~ Qf t~e~ ~YQn~iQn This invention pertains to lifting devices and in particular to a wheelchalr lifting dev.ice that is compact and easily portabls and which allows for the elevation, rotation and tilting of a wheelchair and it~ occupant.
BackqrQun~ ~f the Invent.ion Transportation and access to various services such as physicians, dentists, barbers, etc. pose serious difficulties for handicapped persons confined to wheelchalrs. Specifically, the transfer of the person from whe 81 chair to examination table, ox denti~t chair, is a proce~s requiring a great deal of efort. To aid in the situation, numerous wheelchair lift devices have been developed ~or providing the denti t (for example~ access to the non-ambulatory person, eliminating the need for transfer of the person out of the wheelchair.
For example, Rachman disaloses a portable whselchair tilting device in U.S. Patent No. 4,830,5~7 (is~ued May 16, 1989); however, in this device raising an~ rotating of the wheelchair i~ not possible. ~ 61~, Similarly in U.S. Patent No. 4,759,684 tissued July 26l 1988) ~anzillotta et al disclo~e a wheelchair lift device which raises, rotate6 and tilts th~ wheelchair.
Although the device disclosed by ~anzillotta et al is similar in function to the present invention, it differg ~n that it is not portable.
Prior art in the field of wheelchair lift devices is relatively exten~ive. In addition to the devices disclosed in the aforementioned patents, other similar device have also been developed, for example:
McConnell, U.S. Patent No. 4,790,716 tissued December 13, 1988);
2~ 2~
McConnell, U.S. Patent No. 4,726,730 (issued February 23, 1988);
Peterson, U.S. Patent No. 4,192,549 (is~ued March 11, 1980);
Norton, U.S. Patent No 4,561,823 (i.ssued December 31, 1985);
McConnell, U.S. Patent No, 4,592,695 (issued June 3, 1986);
Zimmerman et al, U.S. Patent No. 4,725,188 (issued February 16, 1988); and Rachman, U.S. Patent No. 3,476,404 (issued November 4, 1969).
Qf the Inve-nti-on The present invent~on addresses the above-describad problems of oonventional wheelchair lifting devioes and provides a means for supporting and raising a wheelchair and which, once raised, can bs rotated or tilted as required. The device inclu~es a base frame and a support or lifting frame on which support tracks are attached.
wheelchair is wheeled on to the ~upport tracks and a lifting mechanism interconnea~ing the base frame and lifting fram0 i8 actuated by ~uitable motor means to raise and lower the lifting or ~upport frame and the wheelchair and occupant thereon. The base frame is pxovided with means ~or 6~abilizing tha a~6embly to inhibit tipping of the device once the wheelchair is in a raised position.
According to a broad aspect the invention relates to a wheelchair support and elsvating apparatu~ comprising a lower or base frame, an upper, load supportin~ ~rame, elevating mean6 interconnecting said base frams and said load supporting frame, motor means fsr actuating said elevating means to raise said upper, support frame to ~2~8 elevated positions with respect to a support surface, means for ti.lt.iny 6aid load supporting frame about a horizontal axis, means or rotating said load fiupporting frame about a vertical axis and means for stabilizing said lower or base frame.
Brief Descr.iptiQn of ~ e Drawinqs The invention i6 illustrated by way of example in the accompanying drawings in which:
FIGURE 1 is plan view of the assembly;
FIGURE 2 i~ an elevation view in section as seen from the lines 2-2 of Figure 1;
FIGURE 3 i~ fragmentary end elevation Vi2W;
FIGURE 4 is a per~pective view of the assembly in a raised position; and FIGURE 5 is a fragmentaxy, perspective view of a portion of the support frame.
Descxiption of the.Prefçrred Embodjiment Referring to the drawings, the wheel chair lift assembly is indicated generally at 10 and includes a lower o.r base frame 12 and an upper, moveable frame 14.
Briefly, it will seen from Figure 2 that the upper frame 14 iB connected to the lower frame 12 by means of two pairs of arms 16, 18, which, when moved from a horizontal position (Figure 3) to intermediate and uppermost positions (Figures 2 and 4) serve to elevate the upper frame 14 from the ba~e frame.
Base frame 12 comprises an elongated, trough-like structure formed by a bottom wall 20, side wall~ 22 and 24 and end wall6 provided by lateral stabili~er6 26 and 28 respectively. As 6een in Figureæ 1 and 4, stabilizer 28 is itself of box-like configuration including side wall~ 30 and 32 and is of a size sufficient to - ~ -accommodate motor means indicated generally at 3~ for actuating the mechanism to rai6e and lower the upper frame 14. It will also be noted that stabilizer 28 includes suitable rollers or wheels 36 and that 5 stabilizer 26 at the other end of the assembly includes a tongue 38. It will be understood that tongue 38 allows for the connection of a suitable form of towing means which may be utilized to lift the tongue end of the assembly and, due to the provision of the rollers 36, the assembly can be easily moved about.
The upper frame 14 i6 the member of the assembly which is moved fxom a lower, rest position to an upper, raised position as shown in Figure 4, and upper frame 14 carries the full load of a wheel chair or the like and its occupant.
Frame 14 comprises a central portion 40 preferably constructed of high trength alloy rectangular tubing and is of elongated rectangular configuration having side rails 42, 44, spaced and interconnected by cross members 46, 48 and 50 as shown in Figures 1 and 2. Cross members 46 and 50 include downwardly and outwardly extending leg members 52, 54 which are provided at their lower ~erminal ends with laterally extending tubular mambers 56 and 58 respectively.
As seen clearly in Figurs l, the upper frame 14 supports a pair of spaoed parallel elongated traoks 60 and 62. These tracks receive the wheels of a wheelchair and each track is wide enough to accommodate some deviation of line when a wheelchair is being run on to the track~ when the frame 14 i8 at the lowermost or ground level as sesn in Figure 3. Each track 60, 62 has short side walls 64 and end walls 66 as well as a rectangular opening 68 adjacent the entrance end of the tracks. It will be evident that the large wheels of a wheelchair drop lnto the openings 68 when the upper frame 14 is raised above ground level and this prevents the wheelchair from moving fore and aft on the tracks 60, 6~.
In order to adjust the l.ifting frame 14 to accommodate wheelchairs of varying track widths, tracks 60 and 62 are adjustably mounted to the leg6 52, 54 of frame 40. As shown in Figures 1 and 5, tracks 60 and 62 are each provided with a pair of inwardly extending arms 70, 72 respectively and these arms are accommodated in the tubular members 56 and 58 at ths lower encls o arms 52 and 54 as shown and are secured therein by mean~ of suitable ret:a.ining means such as wing nutc 74, 76 or the equivalent. It would be appreciated that by loosening off the winy nuts the tracks 60 and 62 can be mo~ed toward or away from one another to accommodate the various tracX widths of wheel chairs of different sizes.
Turning now to Figures 2 and 3, apparatus is provided for rai~ing and lowering the upper frame 14 and for maintaining that frame in a desired position with respect to the lower or base frame, 12. Thi~ apparatus includes the arms 16 and 18 which are plvotally connected at their lower ends to front and rear captive nuts 78 and 80 which are located in the lower, base frame 12 by means of longitudinally extending guide rods 82 and 84 which are secured at their ends to the ~tabilizer end~ of the base frame 12.
A6 shown in Figures 1 and 2, the motor means 34 is connected to an elongated shaft 86 located in the lower or base frame 12 hetween the guide rod~ 82 and 84. The motor means is connected to shaft 86 through a suitable coupling means 88 (Figure 2) and shaft 86 i8 threaded throughout its length and is engaged thereby in the oaptive nuts 78 and 80 in the base frame 12, It will be . 2 ~
understood that rotation of the threaded shaft 86 by the motor means 34 will cause the captive nuts 78, 80 to be either drawn towards one another thereby raising the upper frame 14 through the ackion of the interconnecting arms 16 and 18 or moved away ~rom one another towards the ends of the lower ~rame 12 to effectively lower the fxame 14.
Upper frame 14 is carried by a support assembly indicated generally at 90 in Figure 2. Assembly 90 includes a connector block 92 to which the upper ends of arms 16 and 18 are connected by means of pivot pins 94, the upper ends cf arms 16 and 18 having meshing gearea portions 96, as shown, ~o that the arms act in unison in raising and lowering functions.
Connector block 92 includes a vertically oriented central shaft 98 which a rsduced diameter spindle 100.
Shaft 98 is provided with a thrust bearing 102 which takes the load of a pivot block 104 mounted thereon and block 104 is mounted for rotation on spindle 100 by means a suitable bearing 106. Block 104 i~ retained in position on the ~haft 98 and spirldle 100 by means of a hold down nut and washer llO.
A top plate 112 is secured to a sleeve 114 ~hich i8 mounted on a pivot pin 116 secur~d in a channel 118 of blook 104. The members 42, 44 of top frame 14 are then sscured, preferably d~tachably so, to the plate 112 to complete the support assembly 90.
It will be apparent that with the above mentioned connection of the upper frame 14 to plate 112 that frame 14 can be tilted upwardly with respect to the unit by means of the pivot pin 116 in the sleeve 114.
Additionally, through the provisions of bearings 106 and 102, upper frame 14 can be rota~ed on a horizontal plane with respect to the lower, base frame 12 and, in order to J ~ 2 8 retain the upper frame 14 in several positions in such a horizontal plane, block 92 may be provided with a series of indentations (not shown) to receive a ball detent 120 hiased to a retaining position by mean~ of a suitable spring 122 located in the body of block 104.
In operation, the upper frame i6 located at a ground or support level as shown in Figure 3. ~ wheelchair and its occupant is moved on to the track 60 and 62 until the main wheelfi of the wheelchair are located over the openings 58. The motor means 34 is then actuated to rotats the threaded shaft 86 drawing the captive nuts 78 and 80 toward one another, effecting i~ward movement of the lower ends of arms 16 and 18 thareby raising the support assembly 90 and the upper frame 14 with the wheelahair and its occupant thereon. When the desired elevation is reached, the upper frame can be rotated to the desired orientation and tiltea rearwardly if so de~ired.
~hs fact that the lifting device of this invention is so aasily storable and portable is a most important feature. In its lower, inoperative position the assembly is quite low in elevation and, when placed on its edge and utilizing caster wheel 25 and fixed trailing wheels 27 mounted on end wall 30, it can be easily ~tored in a ~5 closet or coat rack area of a home or that of a physician's or dentist's office, barber shop, hairdresser shop or the like and from which it can quickly be removed to accommodate a patiant or client who is wheelchair-conf i ned.
Additionally, the unit can easily fit into the trunk or rear seat area of most vehicles.
A small lightweight towing handle 39 can be snapped onto the tongue or hitch 38 and, with the stabilizer legs and feet 29 moved to an upper position, the assembly, with a wheslchalr and occupant in place on the upper ~ 2 ~
frame 14 can be easily and quickly manoeuvred to a desired location.
Nhile the invention has been described in connection with a speci.fic embodiment thereof and in a 6pecific use, various modifications thereof will occur to those skilled in the art without departing from the spirit and sc~pe of the inventlon as set forth in the appended claims.
The terms and expressions which have been employed in this specification are used as terms of description and not of limitations, and there is no intention in the use of such terms and expression6 to exclude any equivalents of the features shown and described or portions thereof, but it is recognized that various modifications are possible within the scope of the invention claim6.
Claims (3)
1. A wheelchair support and elevating apparatus compris-ing a lower or base frame, an upper, load supporting frame, elevating means interconnecting said base frame and said load supporting frame, motor means for actuating said elevating means to raise said upper, support frame to elevated positions with respect to a support surface, means for tilting said load supporting frame about a horizontal axis, means for rotating said load supporting frame about a vertical axis and means for stabilizing said lower or base frame.
2. The apparatus according to claim 1 wherein said elevating means comprises a threaded shaft in said base frame with motor means for rotating said threaded shaft, a pair of captive nuts, one at either end of said base frame and mounted on said threaded shaft for movement along said base frame responsive to rotation of said shaft, a pair of arms pivotally located at one of their ends to a respective one of said captive nuts, a support assembly pivotally connected to the upper ends of said arms whereby rotation of said threaded shaft effects raising or lowering of said arms and the support assembly on the upper end thereof.
3. Apparatus according to claim 2 wherein said support assembly comprises means for detachably connecting said upper support frame to said arms and comprises a connector block interconnecting the upper ends of said arms, shaft means on said connector block, a pivot block mounted for rotation on said shaft means, plate means pivotally mounted on said pivot block for rotation about a horizontal axis, and said upper support frame being detachably connected to said plate means.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2012128 CA2012128A1 (en) | 1990-03-14 | 1990-03-14 | Wheelchair lift |
| AU69075/91A AU6907591A (en) | 1990-03-14 | 1990-12-14 | Wheelchair lift |
| PCT/CA1990/000446 WO1991013603A1 (en) | 1990-03-14 | 1990-12-14 | Wheelchair lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2012128 CA2012128A1 (en) | 1990-03-14 | 1990-03-14 | Wheelchair lift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2012128A1 true CA2012128A1 (en) | 1991-09-14 |
Family
ID=4144521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2012128 Abandoned CA2012128A1 (en) | 1990-03-14 | 1990-03-14 | Wheelchair lift |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU6907591A (en) |
| CA (1) | CA2012128A1 (en) |
| WO (1) | WO1991013603A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2416345B (en) | 2005-04-28 | 2006-06-07 | David Vandyke | Wheelchair lifting bay |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3476404A (en) * | 1967-11-08 | 1969-11-04 | Metal Dynamics Corp | Wheelchair lift |
| US3645501A (en) * | 1970-03-23 | 1972-02-29 | Bryan H Musgrove | Automotive jack |
| US4192549A (en) * | 1978-08-14 | 1980-03-11 | Petersen John F | Weeelchair tilt cradle |
| ZA839388B (en) * | 1982-12-24 | 1984-07-25 | Hatrick Ind Ltd | Wheelchair tipping apparatus |
| GB8411845D0 (en) * | 1984-05-09 | 1984-06-13 | Chair Up Ltd | Attachment for wheelchair |
| US4592695A (en) * | 1984-10-19 | 1986-06-03 | Mcconnell Sylvia J | Shampoo lift for a wheelchair |
| US4790716A (en) * | 1986-06-03 | 1988-12-13 | Mcconnell Sylvia J | Device for handling a wheelchair |
| US4726730A (en) * | 1986-06-03 | 1988-02-23 | Mcconnell Sylvia J | Device for handling a wheelchair |
| US4725188A (en) * | 1986-12-22 | 1988-02-16 | Zimmermann Donald L | Furniture implement for use with a wheelchair |
| US4759684A (en) * | 1987-01-16 | 1988-07-26 | Amerigo Lanzillotta | Wheelchair lift |
| US4830567A (en) * | 1987-10-20 | 1989-05-16 | Rachman Isadore B | Portable wheelchair lift |
-
1990
- 1990-03-14 CA CA 2012128 patent/CA2012128A1/en not_active Abandoned
- 1990-12-14 WO PCT/CA1990/000446 patent/WO1991013603A1/en unknown
- 1990-12-14 AU AU69075/91A patent/AU6907591A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO1991013603A1 (en) | 1991-09-19 |
| AU6907591A (en) | 1991-10-10 |
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