US3780728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Walking device
Assignee: Individual
•
Filing: 1972-08-01
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Granted: 1973-12-25
•
Expires: 1992-08-01
Abstract
Abstract The combination of a stiff splint-like device for application to a cast on the user''s lower leg and foot and tiltable therewith relative to the ground surface, and a ground-engaging resilient member rotatable horizontally about the upright axis of the device.
Inventors
- 👤 R Stader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:53
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/04; A61F13/041; A61F13/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A walking device comprising an upright frame for attachment to a user''s leg and including a stirrup-like element at its lower end forming a substantially horizontal downwardly facing flat circular platform of hard smooth material, a member of smaller diameter rotatable horizontally beneath said platform and having a smooth flat upper face engaging said platform and a split compressible central journal extending upwardly through said platform and terminating in a downwardly facing shoulder normally overlying said platform, said smaller diameter member including a peripheral lower rib, and a cup-like element of resilient material receiving said member and recessed to receive said rib and having a convex ground-contacting lower face.
Claim 2
Dependent Claim
109 words
A walking device comprising an upright frame for attachment to a user''s leg and including a stirrup-like element at its lower end forming a substantially horizontal downwardly facing flat circular platform of hard smooth material, a member of smaller diameter rotatable horizontally beneath said platform and having a smooth flat upper face engaging said platform and a split compressible central journal extending upwardly through said platform and terminating in a downwardly facing shoulder normally overlying said platform, said smaller diameter member including a peripheral lower rib, and a cup-like element of resilient material receiving said member and recessed to receive said rib and having a convex ground-contacting lower face.
References Cited (Backward Citations)
GB190123778A
Cited
FR564989A
Cited
US2264570A
Cited
AT164801B
Cited
AT212974B
Cited
US3481332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |