Patent US4291715A successfully refreshed from Google Patents.
US4291715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foot support crutch
Assignee: U-KNEE CRUTCH
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Filing: 1980-02-04
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Granted: 1981-09-29
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Expires: 2000-02-04
Abstract
Abstract There is disclosed a lower leg or foot support crutch having a cushion support for engaging the leg below the knee and for transmitting the forces applied through the cushion directly downward to a ground engaging leg. In one embodiment there is shown a dual ground support arrangement having level seeking ability for the leg supports.
Inventors
- 👤 Woodrow S. Monte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:18
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; A61H2003/005; A61H2003/0205
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
167 words
A lower leg or foot crutch comprising a ground contact member adapted for receiving downwardly applied forces and for transmitting any said applied forces to the ground at a point effectively in line with said applied forces, an intermediate support device having an upper end and a lower end, said lower end connected to said ground contact member and adapted for transmitting forces to said ground contact member through said connection, an upper body stabilizing member having uper and lower ends, said upper end adapted for positioning against a users body, and said lower end connected to said intermediate support device at a position between said lower and upper ends of said intermediate support device, and a leg support member for engaging the leg of a user below the knee thereof, and for accepting downwardly applied forces from said user, said leg support member attached exclusively to said upper end of said intermediate support device for transmitting any said accepted forces directly to said intermedite support device.
Claim 2
Dependent Claim
167 words
A lower leg or foot crutch comprising a ground contact member adapted for receiving downwardly applied forces and for transmitting any said applied forces to the ground at a point effectively in line with said applied forces, an intermediate support device having an upper end and a lower end, said lower end connected to said ground contact member and adapted for transmitting forces to said ground contact member through said connection, an upper body stabilizing member having uper and lower ends, said upper end adapted for positioning against a users body, and said lower end connected to said intermediate support device at a position between said lower and upper ends of said intermediate support device, and a leg support member for engaging the leg of a user below the knee thereof, and for accepting downwardly applied forces from said user, said leg support member attached exclusively to said upper end of said intermediate support device for transmitting any said accepted forces directly to said intermedite support device.
Claim 3
Dependent Claim
52 words
The device of claim 1 wherein said ground contact member has a plurality of ground contact points and where in said ground contact member is attached to said stabilizing member by a support strut having one end connected to said stabilizing member and a second end attached to said ground contact member.
Claim 4
Dependent Claim
52 words
The device of claim 1 wherein said ground contact member comprises first and second ground contact legs, a ground-leveling device interposed between said ground contact legs, said ground leveling device having means for allowing the legs to rotate about an axis, and means controlled by downward pressure for preventing said leg rotation.
Claim 5
Dependent Claim
66 words
The invention set forth in claim 3 wherein said ground leveling device rotating means includes a clutch plate having a first friction surface, an outer housing having a second friction surface adapted to mate with said first friction surface, so as to prevent relative movement between said first and second surfaces, and means for separating said first and second surfaces when said downward pressure is removed.
Claim 6
Dependent Claim
28 words
The invention set forth in claim 1 further comprising means for adjusting the height of said leg support member independent from the height of said body stabilizing member.
Claim 7
Dependent Claim
89 words
A crutch comprising a body stabilizing member having an upper end for engaging the body of the user and a curved lower end, a ground engaging member, an intermediate support device having upper and lower ends, said support connected to said curved lower end of said body stabilizing member at a point along said support intermediate to said upper and lower ends, and a leg support member for accepting the weight of said user, said leg support member attached exclusively to said upper end of said intermediate support device.
Claim 8
Dependent Claim
89 words
A crutch comprising a body stabilizing member having an upper end for engaging the body of the user and a curved lower end, a ground engaging member, an intermediate support device having upper and lower ends, said support connected to said curved lower end of said body stabilizing member at a point along said support intermediate to said upper and lower ends, and a leg support member for accepting the weight of said user, said leg support member attached exclusively to said upper end of said intermediate support device.
Claim 9
Dependent Claim
14 words
The device of claim 6 where said intermediate support device is a straight rod.
Claim 10
Dependent Claim
20 words
The device of claim 6 wherein said intermediate support device is a plurality of concentric straight pipes adjustable lengthwise therebetween.
Claim 11
Dependent Claim
52 words
The device of claim 8 wherein said ground contact member comprises first and second ground contact legs, a ground-leveling device interposed between said ground contact legs, said ground leveling device having means for allowing the legs to rotate about an axis, and means controlled by downward pressure for preventing said leg rotation.
Claim 12
Dependent Claim
66 words
The invention set forth in claim 9 wherein said ground leveling device rotating means includes a clutch plate having a first friction surface, an outer housing having a second friction surface adapted to mate with said first friction surface so as to prevent relative movement between said first and second surfaces, and means for separating said first and second surfaces when said downward pressure is removed.
Claim 13
Dependent Claim
162 words
A crutch leveling device for use at the base of a leg or foot crutch for stabilizing said crutch on uneven terrain, said device comprising a plurality of legs extending downward from said device and adapted for contact with the ground, a clutch member having means for attaching to said legs, said clutch member rotatable about a pivot point and having a top surface, a friction bearing surface displaced about said top surface, a housing constructed concentric to and surrounding said clutch, said housing having an inner surface adapted for mating relationship with said clutch top surface, said inner surface having a friction bearing surface such that when first and second friction bearing surfaces are in contact with each other rotation of said clutch member is inhibited, means for urging said first and second friction surfaces together when downward pressure is applied to said crutch, and means for reducing the friction between said surfaces when said pressure is removed from said crutch.
Claim 14
Dependent Claim
162 words
A crutch leveling device for use at the base of a leg or foot crutch for stabilizing said crutch on uneven terrain, said device comprising a plurality of legs extending downward from said device and adapted for contact with the ground, a clutch member having means for attaching to said legs, said clutch member rotatable about a pivot point and having a top surface, a friction bearing surface displaced about said top surface, a housing constructed concentric to and surrounding said clutch, said housing having an inner surface adapted for mating relationship with said clutch top surface, said inner surface having a friction bearing surface such that when first and second friction bearing surfaces are in contact with each other rotation of said clutch member is inhibited, means for urging said first and second friction surfaces together when downward pressure is applied to said crutch, and means for reducing the friction between said surfaces when said pressure is removed from said crutch.
References Cited (Backward Citations)
FR497013A
Cited
GB593340A
Cited
US3016060A
Cited
US3999565A
Cited
FR2267750A1
Cited
US4141375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |