Patent US3885988A successfully refreshed from Google Patents.
US4299528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination wheelchair lift and steps for vehicle doorways
Assignee: Individual
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Filing: 1980-02-25
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Granted: 1981-11-10
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Expires: 2000-02-25
Abstract
Abstract The lift comprises a pair of side plates with hand rails and a floor panel hinged to one side plate at the base thereof for movement from a platform position to a substantially vertical, non-operating position and vice versa. The lift is situated in a vehicle door opening in place of the usual steps and can be moved hydraulically from a ground engaging position outside of the vehicle to a position inside the vehicle and upon the floor thereof. A step insert is provided for normal entering and leaving when the device is not in use and the floor panel is in the uppermost non-operating position.
Inventors
- 👤 James E. Kazeil
- 👤 Joseph Kazeil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:04
CPC Classifications
A; A61; A61G; A61G3/00; A61G3/02; A61G3/06; A61G3/062; A61G2220/00; A61G2220/16; Y; Y10; Y10S; Y10S414/00; Y10S414/134
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
141 words
In a vehicle doorway opening which includes an upper vehicle floor portion and a lower vehicle base portion; a selectively operable wheelchair lift assembly in said doorway, said lift assembly comprising in combination a pair of spaced and parallel side panels and a floor panel, at least the front portion of said floor panel being hinged adjacent the base of one of said side panels and being movable from a load receiving platform position to a substantially vertical stored position against the side panel to which it is hinged, and vice versa, a linkage arm assembly mounting said lift assembly for movement between a ground engaging position outside of said vehicle doorway to a vehicle floor engaging position within said vehicle and vice versa and means operatively connected to said lift assembly for moving same from one position to the other.
Claim 2
Dependent Claim
141 words
In a vehicle doorway opening which includes an upper vehicle floor portion and a lower vehicle base portion; a selectively operable wheelchair lift assembly in said doorway, said lift assembly comprising in combination a pair of spaced and parallel side panels and a floor panel, at least the front portion of said floor panel being hinged adjacent the base of one of said side panels and being movable from a load receiving platform position to a substantially vertical stored position against the side panel to which it is hinged, and vice versa, a linkage arm assembly mounting said lift assembly for movement between a ground engaging position outside of said vehicle doorway to a vehicle floor engaging position within said vehicle and vice versa and means operatively connected to said lift assembly for moving same from one position to the other.
Claim 3
Dependent Claim
45 words
The device according to claim 1 which includes a step insert within said door opening between said vehicle floor portion and the lower vehicle base portion for entering and leaving the vehicle when said lift assembly floor panel is in the substantially vertical, stored position.
Claim 4
Dependent Claim
76 words
The device according to claim 1 in which the floor panel includes said front hinged portion and a fixed rear portion also extending between said side panels at the bases thereof, said rear portion engaging upon the upper vehicle floor when said lift assembly is in the vehicle floor engaging position, said portions of said floor panels being in planar relationship one with the other when said hinged portion is in the load receiving platform position.
Claim 5
Dependent Claim
76 words
The device according to claim 2 in which the floor panel includes said front hinged portion and a fixed rear portion also extending between said side panels at the bases thereof, said rear portion engaging upon the upper vehicle floor when said lift assembly is in the vehicle floor engaging position, said portions of said floor panels being in planar relationship one with the other when said hinged portion is in the load receiving platform position.
Claim 6
Dependent Claim
64 words
The device according to claim 1 in which said assembly also includes a pair of spaced and parallel mounting plates outboard of said side panels, said mounting plates being secured one each side of the vehicle doorway opening, said linkage arm assembly being pivotally connected by the inner ends thereof to said mounting plates and by the outer ends thereof, to said side panels.
Claim 7
Dependent Claim
64 words
The device according to claim 2 in which said assembly also includes a pair of spaced and parallel mounting plates outboard of said side panels, said mounting plates being secured one each side of the vehicle doorway opening, said linkage arm assembly being pivotally connected by the inner ends thereof to said mounting plates and by the outer ends thereof, to said side panels.
Claim 8
Dependent Claim
64 words
The device according to claim 3 in which said assembly also includes a pair of spaced and parallel mounting plates outboard of said side panels, said mounting plates being secured one each side of the vehicle doorway opening, said linkage arm assembly being pivotally connected to the inner ends thereof to said mounting plates and by the outer ends thereof, to said side panels.
Claim 9
Dependent Claim
64 words
The device according to claim 4 in which said assembly also includes a pair of spaced and parallel mounting plates outboard of said side panels, said mounting plates being secured one each side of the vehicle doorway opening, said linkage arm assembly being pivotally connected by the inner ends thereof to said mounting plates and by the outer ends thereof, to said side panels.
Claim 10
Dependent Claim
47 words
The device according to claim 1 in which said linkage arm assembly includes a pair of parallel links each side of said lift assembly, mounted for parallelogram movement thereby maintaining said floor panel of said lift assembly, substantially horizontal when moving from one position to the other.
Claim 11
Dependent Claim
47 words
The device according to claim 2 in which said linkage arm assembly includes a pair of parallel links each side of said lift assembly, mounted for parallelogram movement thereby maintaining said floor panel of said lift assembly, substantially horizontal when moving from one position to the other.
Claim 12
Dependent Claim
47 words
The device according to claim 3 in which said linkage arm assembly includes a pair of parallel links each side of said lift assembly, mounted for parallelogram movement thereby maintaining said floor panel of said lift assembly, substantially horizontal when moving from one position to the other.
Claim 13
Dependent Claim
47 words
The device according to claim 4 in which said linkage arm assembly includes a pair of parallel links each side of said lift assembly, mounted for parallelogram movement thereby maintaining said floor panel of said lift assembly, substantially horizontal when moving from one position to the other.
Claim 14
Dependent Claim
47 words
The device according to claim 5 in which said linkage arm assembly includes a pair of parallel links each side of said lift assembly, mounted for parallelogram movement thereby maintaining said floor panel of said lift assembly, substantially horizontal when moving from one position to the other.
Claim 15
Dependent Claim
47 words
The device according to claim 6 in which said linkage arm assembly includes a pair of parallel links each side of said lift assembly, mounted for parallelogram movement thereby maintaining said floor panel of said lift assembly, substantially horizontal when moving from one position to the other.
Claim 16
Dependent Claim
47 words
The device according to claim 7 in which said linkage arm assembly includes a pair of parallel links each side of said lift assembly, mounted for parallelogram movement thereby maintaining said floor panel of said lift assembly, substantially horizontal when moving from one position to the other.
Claim 17
Dependent Claim
47 words
The device according to claim 8 in which said linkage arm assembly includes a pair of parallel links each side of said lift assembly, mounted for parallelogram movement thereby maintaining said floor panel of said lift assembly, substantially horizontal when moving from one position to the other.
Claim 18
Independent Claim
37 words
The device according to claims 1, 2 or 3 in which said means operatively connected to said lift assembly for moving same includes at least one fluid operator operatively connected between said vehicle and said lift assembly.
Claim 19
Dependent Claim
34 words
The device according to claim 4 in which said means operatively connected to said lift assembly for moving same includes at least one fluid operator operatively connected between said vehicle and said lift assembly.
Claim 20
Independent Claim
44 words
The device according to claims 5, 6 or 7 in which said means operatively connected to said lift assembly for moving same from one position to the other includes at least one fluid operator operatively extending between said mounting plates and said lift assembly.
Claim 21
Dependent Claim
41 words
The device according to claim 8 in which said means operatively connected to said lift assembly for moving same from one position to the other includes at least one fluid operator operatively extending between said mounting plates and said lift assembly.
Claim 22
Independent Claim
37 words
The device according to claims 9, 10 or 11 in which said means operatively connected to said lift assembly for moving same includes at least one fluid operator operatively connected between said vehicle and said lift assembly.
Claim 23
Dependent Claim
34 words
The device according to claim 12 in which said means operatively connected to said lift assembly for moving same includes at least one fluid operator operatively connected between said vehicle and said lift assembly.
Claim 24
Independent Claim
44 words
The device according to claims 13, 14 or 15 in which said means operatively connected to said lift assembly for moving same from one position to the other includes at least one fluid operator operatively extending between said mounting plates and said lift assembly.
Claim 25
Dependent Claim
41 words
The device according to claim 16 in which said means operatively connected to said lift assembly for moving same from one position to the other includes at least one fluid operator operatively extending between said mounting plates and said lift assembly.
References Cited (Backward Citations)
US3893697A
Cited
US4029223A
Cited
US4027807A
Cited
US4081091A
Cited
US4058228A
Cited
US4039091A
Cited
US4134504A
Cited
US4158524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |