US4407543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanized wheelchair
Assignee: Individual
•
Filing: 1981-10-30
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Granted: 1983-10-04
•
Expires: 2001-10-30
Abstract
Abstract The specification discloses improvements in a mechanized wheelchair in which the seat, back and leg members are so linked and articulated on a body frame as to enable the occupant to assume any one of three positions, namely sitting, standing or reclining. By movably mounting the body frame on a base frame the height may also be controlled in conjunction with the above positions. A drive means is also provided and the use of electrical operational means and an improved structural design make this invention safer and more versatile than any disclosed in the art.
Inventors
- 👤 David Mashuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:14
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/006; A61G5/10; A61G5/14; A61G2200/00; A61G2200/30; A61G2200/36; Y; Y10; Y10S; Y10S180/00; Y10S180/907; Y10S297/00; Y10S297/04; Y10S297/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
252 words
In a mechanized wheelchair of the type comprising a rectangular body frame supported on front and rear pair of wheels, a rectangular seat frame pivotally mounted at its forward end on the forward end of the body frame and being swingable upwardly from a horizontal position in which it rests on the body frame to an upright position, a rectangular back frame pivotally mounted on one end of the rear end of the seat frame being swingable from a horizontal position in which its rear end rests on the body frame to an upright position, a pair of leg rest frames pivotally connected at their upper ends to the forward end of the seat frame and being swingable from a downwardly extending position upwardly into a position co-planar with the seat frame, the improvement comprising a base frame mounted on the wheels at corners of the body frame so as to position the body frame on the base frame for vertical telescoping movement thereon, a lever arm affixed to the bottom of the seat frame extending downwardly therefrom, first power operated means attached to the body frame to the rear end of the seat frame and to the free end of said lever arm for swinging the seat supporting a person from horizontal to upright position by pulling the lever arm, and second power operated means mounted on the base frame and attached to the body frame for raising and lowering the frame supporting a person with respect to the base frame.
Claim 2
Dependent Claim
252 words
In a mechanized wheelchair of the type comprising a rectangular body frame supported on front and rear pair of wheels, a rectangular seat frame pivotally mounted at its forward end on the forward end of the body frame and being swingable upwardly from a horizontal position in which it rests on the body frame to an upright position, a rectangular back frame pivotally mounted on one end of the rear end of the seat frame being swingable from a horizontal position in which its rear end rests on the body frame to an upright position, a pair of leg rest frames pivotally connected at their upper ends to the forward end of the seat frame and being swingable from a downwardly extending position upwardly into a position co-planar with the seat frame, the improvement comprising a base frame mounted on the wheels at corners of the body frame so as to position the body frame on the base frame for vertical telescoping movement thereon, a lever arm affixed to the bottom of the seat frame extending downwardly therefrom, first power operated means attached to the body frame to the rear end of the seat frame and to the free end of said lever arm for swinging the seat supporting a person from horizontal to upright position by pulling the lever arm, and second power operated means mounted on the base frame and attached to the body frame for raising and lowering the frame supporting a person with respect to the base frame.
Claim 3
Dependent Claim
19 words
A mechanized wheelchair according to claim 1 in which the lever arm is curved and extends downwardly and forwardly.
Claim 4
Dependent Claim
49 words
A mechanized wheelchair according to claim 1 in which the lever arm is affixed to the bottom of the seat frame rearward of the pivotal mounting of the seat frame on the body frame and extends forwardly of the pivotal mounting of the seat frame on the body frame.
Claim 5
Dependent Claim
35 words
A mechanized wheelchair according to claim 1 in which the pivotal mounting of the seat frame on the body frame and the pivotal connection between the seat frame and the leg support frame are coaxial.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |