US4508335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sit-up exerciser
Assignee: SHAPE ACQUISTION Corp A CORP OF
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Filing: 1983-02-09
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Granted: 1985-04-02
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Expires: 2003-02-09
Abstract
Abstract A simple, inexpensive and highly stable sit-up exerciser is disclosed having a horizontal frame and seat. The height and longitudinal position of the ankle-engaging portion of the device is adjustable relative to the seat and, where provided, the knee support, to suit the anatomy of any user.
Inventors
- 👤 Robert C. Kelley
- 👤 Ira J. Silberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:22
CPC Classifications
A; A63; A63B; A63B23/00; A63B23/02; A63B23/0205; A63B23/0211
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
132 words
A sit-up exerciser comprising: a frame having a generally flat, horizontal, bifuricated floor-engaging rear frame portion with two rearwardly extending side members which are contiguous with the floor over substantially their entire length, the front ends of said side members converging at the front of said rear frame portion, and a longitudinally extending front frame portion with a central longitudinal member having an upturned front end and a rear end which is joined to the converging front ends of said side members; a low horizontal seat adjacent the floor attached to said rear frame portion substantially at the level of said side members; and ankle-engaging means attached to said upturned front end of said front frame portion at an elevated position above the floor for engaging the tops of a user's ankles.
Claim 2
Dependent Claim
132 words
A sit-up exerciser comprising: a frame having a generally flat, horizontal, bifuricated floor-engaging rear frame portion with two rearwardly extending side members which are contiguous with the floor over substantially their entire length, the front ends of said side members converging at the front of said rear frame portion, and a longitudinally extending front frame portion with a central longitudinal member having an upturned front end and a rear end which is joined to the converging front ends of said side members; a low horizontal seat adjacent the floor attached to said rear frame portion substantially at the level of said side members; and ankle-engaging means attached to said upturned front end of said front frame portion at an elevated position above the floor for engaging the tops of a user's ankles.
Claim 3
Dependent Claim
35 words
An exerciser according to claim 1 wherein said front frame portion has a raised center section, further comprising knee support means attached to said raised center section for supporting the backs of the user's knees.
Claim 4
Dependent Claim
17 words
An exerciser according to claim 2 wherein said knee support means comprises a padded lateral knee bar.
Claim 5
Dependent Claim
17 words
An exerciser according to claim 2 further comprising means for adjusting the height of said ankle-engaging means.
Claim 6
Dependent Claim
42 words
An exerciser according to claim 4 wherein said ankle-engaging means comprises a padded lateral ankle bar, and said ankle height adjusting means comprises means for adjusting the position of said ankle bar relative to said upturned end of said front frame portion.
Claim 7
Dependent Claim
22 words
An exerciser according to claim 4 further comprising means for longitudinally adjusting said front frame portion relative to said rear frame portion.
Claim 8
Dependent Claim
33 words
An exerciser according to claim 6 wherein said longitudinal adjusting means comprises means for adjustably connecting the rear end of said front frame portion to the converging front ends of said side members.
Claim 9
Dependent Claim
17 words
An exerciser according to claim 1 further comprising means for adjusting the height of said ankle-engaging means.
Claim 10
Dependent Claim
42 words
An exerciser according to claim 9 wherein said ankle-engaging means comprises a padded lateral ankle bar, and said ankle height adjusting means comprises means for adjusting the position of said ankle bar relative to said upturned end of said front frame portion.
Claim 11
Dependent Claim
22 words
An exerciser according to claim 8 further comprising means for longitudinally adjusting said front frame portion relative to said rear frame portion.
Claim 12
Dependent Claim
17 words
An exerciser according to claim 10 further comprising means for adjusting the height of said ankle-engaging means.
Claim 13
Dependent Claim
18 words
An exerciser according to claim 9 wherein said seat is attached to the tops of said side members.
Claim 14
Dependent Claim
15 words
An exerciser according to claim 12 wherein said side members protrude rearwardly of said seat.
References Cited (Backward Citations)
US2759730A
Cited
US3286708A
Cited
GB1101009A
Cited
US3682475A
Cited
US4046373A
Cited
US4337942A
Cited
JPS5793354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |