US3759511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable friction type exercising device
Assignee: WAYNE ZINKIN DE
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Filing: 1971-03-29
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Granted: 1973-09-18
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Expires: 1991-03-29
Abstract
Abstract A device for exercising the muscles of the legs, which simulates the striding movement which occurs during actual running. A body support frame is provided having a pair of foot engaging pendulum arms mounted thereon for movement through predetermined arcuate paths of travel with an adjustable friction developing mechanism being operatively associated with an arcuate sector to offer resistance to movements of the arms. The device offers substantially a constant resistive force throughout the entire range of thrust movement during extension of a user''s leg and provides substantially unrestricted leg movement in the opposite direction during retraction of a user''s leg.
Inventors
- 👤 Wayne Zinkin De
- 👤 C Coker
- 👤 K Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/012; A63B21/015; A63B21/00058; A63B21/00069; A63B22/00; A63B22/0048; A63B22/0056; A63B2022/0051; A63B2208/00; A63B2208/02; A63B2208/0228; A63B2208/0238; A63B2208/0242; A63B2208/0257; A63B2208/0261; A63B2225/00; A63B2225/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
An exercising device comprising: A. support means for supporting a user''s torso in forwardrunning attitude wherein a user''s torso is forwardly inclined and downwardly facing B. confining means for confining the movement of a user''s feet to oscillatory motion along an arcuate path having a radius extending to an oscillatory axis paralleling the axis of the hip joints and disposed above and rearwardly of the knee joints of the user as the user cyclically applies rearwardly directed thrusting forces and forwardly directed lifting forces to each foot; and C. restraining means for applying to each foot a restraining force of a constant magnitude acting in opposition to said thrusting forces.
Claim 2
Dependent Claim
110 words
An exercising device comprising: A. support means for supporting a user''s torso in forwardrunning attitude wherein a user''s torso is forwardly inclined and downwardly facing B. confining means for confining the movement of a user''s feet to oscillatory motion along an arcuate path having a radius extending to an oscillatory axis paralleling the axis of the hip joints and disposed above and rearwardly of the knee joints of the user as the user cyclically applies rearwardly directed thrusting forces and forwardly directed lifting forces to each foot; and C. restraining means for applying to each foot a restraining force of a constant magnitude acting in opposition to said thrusting forces.
Claim 3
Dependent Claim
22 words
The device of claim 1, wherein said confining means includes a pair of depending arms supported for independent oscillation about said axis.
Claim 4
Dependent Claim
19 words
The device of claim 2, wherein said restraining means includes unidirectional force dissipating means for dissipating said thrusting forces.
Claim 5
Dependent Claim
31 words
The device of claim 2, wherein said confining means further includes a pair of stirrups for separately securing a user''s feet to the distal end portions of said pair of arms.
Claim 6
Dependent Claim
51 words
The device of claim 4, wherein said support means is disposed forwardly and above said stirrups so that the instantaneous included angle defined by a line extended from the hips to the feet of the user and thence to the axis about which the arms are oscillated is an acute angle.
Claim 7
Dependent Claim
41 words
The device of claim 2, wherein said support means includes a support pad for said torso inclined from horizontal at approximately 60* and a pair of upright handles fixed forwardly of said plate and adapted to be grasped by the user.
Claim 8
Dependent Claim
25 words
The device of claim 6, wherein said support pad includes a pivotal portion adapted to be pivoted in a vertical plane about a horizontal axis.
Claim 9
Dependent Claim
20 words
The device of claim 2, wherein said support means includes a support pad for said torso inclined from the horizontal.
Claim 10
Dependent Claim
23 words
The device of claim 2, wherein said support means includes a pair of rigidly supported handles adapted to be grasped by the user.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |