Patent US4565385A successfully refreshed from Google Patents.
US4565385A
Expired / Lapsed
US
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Tiltable supporting wheelchair
Assignee: Individual
•
Filing: 1984-01-16
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Granted: 1986-01-21
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Expires: 2004-01-16
Abstract
Abstract A tiltable supporting wheel chair having a tilting mechanism with front support wheels which pivot downward and outward engaging the floor and raising the front of the wheelchair and tilting it backwards. The tilting mechanism further includes a cross-frame pivotably attached to the frame of the wheelchair and activated by movement of an arm attached to it. The arm is controlled by a rod leading to a pivotal plate which is connected to a lever on the side of the wheelchair by a linkage. Upon movement of the lever, the linkage rotates the plate, moving the arm and cross-frame to extend or retract the front wheels. A locking mechanism prevents accidental movement of the level. Rear supports extend behind the wheelchair and engage the floor upon the front wheels being pivoted to their furthest point forward. An adjustable leg support includes a leg pad slidably mounted on a cross-frame which is pivotly mounted to the frame with a locking rod engaging a locking plate for controlled pivotal movement of the cross-frame. A spring latch engages supports of the cross-frame to allow the pad to lockingly slide along the length of the cross-frame. A head rest is provided which includes a heat support secured to the back support of the chair with a head cushion adjustably mounted thereon.
Inventors
- 👤 Marvin A. Morford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:04
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/12; A61G5/121; A61G5/125; A61G5/128; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
265 words
A tiltable supporting wheelchair mechanism mounted on a conventional wheelchair, the wheelchair having a frame with a seat, back support and two front spaced wheels and two rear spaced wheels, comprising: a tilting mechanism means for the controllable raising of the front of the wheelchair above the floor, said means having a pair of front support wheels and a cross frame structure, the cross frame structure being pivotally mounted at one end to the frame of the wheelchair and to the front support wheels at its opposite end and pivotally connected to a lever, the lever attached to the wheelchair and moveable to cause the pivotal movement of the cross frame from a retracted position to an extended position wherein in the extended position, the front of the wheelchair is lifted off the floor by the support wheels contacting the floor; rear supports, said supports connected to the frame of the wheelchair and extend rearwardly from the frame to contact the floor upon the operation of the tilting mechanism in raising the front of the wheelchair to its highest point above the floor; a leg support means for the selective supporting of an occupant's legs, the leg support means being mounted on the frame of the wheelchair and includes a leg pad mounted on a cross frame, the cross frame being pivotally mounted to the frame of the wheelchair and selectively pivotal between a vertical and horizontal position; a head rest, the head rest mounted to the wheelchair and includes a head support, the head support being secured to the back support of the wheelchair.
Claim 2
Dependent Claim
265 words
A tiltable supporting wheelchair mechanism mounted on a conventional wheelchair, the wheelchair having a frame with a seat, back support and two front spaced wheels and two rear spaced wheels, comprising: a tilting mechanism means for the controllable raising of the front of the wheelchair above the floor, said means having a pair of front support wheels and a cross frame structure, the cross frame structure being pivotally mounted at one end to the frame of the wheelchair and to the front support wheels at its opposite end and pivotally connected to a lever, the lever attached to the wheelchair and moveable to cause the pivotal movement of the cross frame from a retracted position to an extended position wherein in the extended position, the front of the wheelchair is lifted off the floor by the support wheels contacting the floor; rear supports, said supports connected to the frame of the wheelchair and extend rearwardly from the frame to contact the floor upon the operation of the tilting mechanism in raising the front of the wheelchair to its highest point above the floor; a leg support means for the selective supporting of an occupant's legs, the leg support means being mounted on the frame of the wheelchair and includes a leg pad mounted on a cross frame, the cross frame being pivotally mounted to the frame of the wheelchair and selectively pivotal between a vertical and horizontal position; a head rest, the head rest mounted to the wheelchair and includes a head support, the head support being secured to the back support of the wheelchair.
Claim 3
Dependent Claim
97 words
A tiltable supporting wheelchair as defined in claim 1 wherein the tilting mechanism further includes the lever being connected to the cross frame by an arm, the arm being directly connected to the cross frame and to one end of a pivotal plate, the plate being secured to the frame of the wheelchair and a rod connected to the opposite end of the pivotal plate extending to the lever, whereby activation of the lever moves the rod to pivot the plate to move the arm attached to the cross member and extending or retracting the cross member.
Claim 4
Dependent Claim
27 words
A tiltable supporting wheelchair as defined in claim 1 wherein the tilting mechanism means further includes a locking device for securing the lever in a predetermined position.
Claim 5
Dependent Claim
26 words
A tiltable supporting wheelchair as defined in claim 1 wherein the leg support means includes a leg pad which is suitably adjustable along its cross frame.
Claim 6
Dependent Claim
20 words
A tiltable supporting wheelchair as defined in claim 1 wherein the head rest is adjustably mounted on the head support.
References Cited (Backward Citations)
US1241357A
Cited
US2150441A
Cited
US2601889A
Cited
GB889897A
Cited
US3189384A
Cited
US3674310A
Cited
DE2150525A1
Cited
US3848883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |