Patent US4807874A successfully refreshed from Google Patents.
US4807874A
Expired / Lapsed
US
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Combination plantar flexion/dorsiflexion ankle machine
Assignee: Individual
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Filing: 1987-07-24
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Granted: 1989-02-28
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Expires: 2007-07-24
Abstract
Abstract This device relates to an ankle rehabilitation and ankle fitness devices. The device is equipped with apparatus to adjust ankle position and varying amount of resistance which enables the user to progressively strengthen the ankle. The device also functions in a manner to enable the user to isolate and exercise the plantar and dorsal muscle groups of the lower leg and ankle joint, separately.
Inventors
- 👤 Lloyd R. Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:53
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/15; A63B21/151; A63B21/154; A63B21/155; A63B21/06; A63B21/062; A63B21/0626; A63B21/0628; A63B2208/00; A63B2208/02; A63B2208/0228; A63B2225/00; A63B2225/10; A63B2225/105; A63B2225/107; A63B23/00; A63B23/035; A63B23/04; A63B23/08; A63B23/085; Y; Y10; Y10S; Y10S482/00; Y10S482/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
An exercise apparatus comprising: pedal means for restraining a foot, from heel to toe, of a person to exercise in plantar flexion and dorsi flexion, said pedal means defining a plane; pivot means defining a pivot axis for said pedal means, said pivot axis being above the plane of said pedal means: resistance means for resisting angular displacement of said pedal means; elongate, flexible connection means for transmitting force between said pedal means and said resistance means; guide means defining a path of travel for said connection means, said connection means being trained about said guide means; cam means mounted on said pedal means coaxially with said pivot means, said connection means being trained about said cam means for providing a variable resistance in response to angular displacement of said pedal means; and, means for adjusting the angular range of motion of the pedal means.
Claim 2
Dependent Claim
145 words
An exercise apparatus comprising: pedal means for restraining a foot, from heel to toe, of a person to exercise in plantar flexion and dorsi flexion, said pedal means defining a plane; pivot means defining a pivot axis for said pedal means, said pivot axis being above the plane of said pedal means: resistance means for resisting angular displacement of said pedal means; elongate, flexible connection means for transmitting force between said pedal means and said resistance means; guide means defining a path of travel for said connection means, said connection means being trained about said guide means; cam means mounted on said pedal means coaxially with said pivot means, said connection means being trained about said cam means for providing a variable resistance in response to angular displacement of said pedal means; and, means for adjusting the angular range of motion of the pedal means.
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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) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |