US4451080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobility aid
Assignee: Individual
•
Filing: 1981-02-27
•
Granted: 1984-05-29
•
Expires: 2001-02-27
Abstract
Abstract A mobility aid for use in conjunction with crutches or like, by a legless person or a person afflicted with paraplegia for step-like ambulation, the aid having a foot with a convex lower surface.
Inventors
- 👤 Ceoma Nix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:52
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; A61H2003/0211
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
121 words
A mobility aid for use, in conjunction with crutches or other movable supports, for step-like movement by legless persons and persons lacking supporting use of their leg or legs, comprising: a seat; retaining means for securing a person in said seat; leg means attached at one end to said seat for supporting said seat above the ground; and foot means for rocking said aid at the commencement and conclusion of each step, said foot means being secured to an end of said leg means opposite the end attached to said seat, said foot means having a ground-engaging convex surface opposing said leg means, the convexity of said surface extending along the dimension of said foot lying in the direction of movement.
Claim 2
Dependent Claim
121 words
A mobility aid for use, in conjunction with crutches or other movable supports, for step-like movement by legless persons and persons lacking supporting use of their leg or legs, comprising: a seat; retaining means for securing a person in said seat; leg means attached at one end to said seat for supporting said seat above the ground; and foot means for rocking said aid at the commencement and conclusion of each step, said foot means being secured to an end of said leg means opposite the end attached to said seat, said foot means having a ground-engaging convex surface opposing said leg means, the convexity of said surface extending along the dimension of said foot lying in the direction of movement.
Claim 3
Dependent Claim
48 words
The aid of claim 1 and further comprising: hinge means for interconnecting said leg means and said seat and for pivoting said leg means relative to said seat; and locking means for releasably locking said leg means in at least one fixed position with respect to said seat.
Claim 4
Dependent Claim
28 words
The aid of claim 2 wherein said locking means is actuable to lock said leg means in a sitting position generally parallel to said seat to aid sitting.
Claim 5
Dependent Claim
25 words
The aid of claim 3 wherein said seat includes receiving means for receiving said leg means when said leg means is in the sitting position.
Claim 6
Dependent Claim
13 words
The aid of claim 1 wherein said leg means comprises a single leg.
Claim 7
Dependent Claim
14 words
The aid of claim 1 wherein said leg means comprises two or more legs.
Claim 8
Dependent Claim
11 words
The aid of claim 1 wherein said retaining means comprises straps.
Claim 9
Dependent Claim
21 words
The aid of claim 1 wherein said leg means includes length adjusting means for adjusting the length of said leg means.
Claim 10
Dependent Claim
35 words
The aid of claim 8 wherein said leg means comprises a first leg section and a second leg section, and said length adjusting means comprises telescoping said first leg section within said second leg section.
Claim 11
Dependent Claim
18 words
The aid of claim 9 further including length fixing means for fixing said leg sections at desired lengths.
Claim 12
Dependent Claim
37 words
The aid of claim 10 wherein said length fixing means comprises a spring-biased plunger protruding from said first leg section and said second leg section includes a plurality of apertures each of which may receive said plunger.
Claim 13
Dependent Claim
40 words
The aid of claim 8 wherein said leg means comprises an externally threaded first leg section and an engaging internally threaded second leg section, and said length adjusting means comprises screwing said first leg section within said second leg section.
References Cited (Backward Citations)
DE48348C
Cited
BE561720A
Cited
US406328A
Cited
US671638A
Cited
US699932A
Cited
FR371075A
Cited
US2052715A
Cited
US2099345A
Cited
US2783107A
Cited
US3633967A
Cited
SU645650A1
Cited
US4141375A
Cited
US4232896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |