US3584871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-pull type leg exercising device
Assignee: Individual
•
Filing: 1969-05-19
•
Granted: 1971-06-15
•
Expires: 1989-05-19
Abstract
Abstract A novel muscle toning apparatus which includes a pair of displaceable platforms coupled together by a resilient means which enables the respective platforms to be alternately extended apart a predetermined distance and drawn back together into abutting relationship. The platforms are suitably configured so as to support an adult user having one foot placed on either platform with the toes pointing at substantially right angles to the other platform, and the direction of separation. The wheels or rollers attached to the bottom of the platforms rollingly engage the supporting floor surface, and are oriented so as to allow the platforms to be displaced only in the directions to and away from each other.
Inventors
- 👤 Ralph M Kelmon Jr
- 👤 Ralph M Kelmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:23
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/02; A63B21/055; A63B21/0552; A63B21/0004; A63B23/00; A63B23/035; A63B23/04; A63B23/0482; A63B23/0488; A63B71/00; A63B71/02; A63B71/023; A63B2071/025; A63B2071/026; A63B2071/027; A63B21/00058; A63B21/00069; A63B21/04; A63B21/0407; A63B21/0428; A63B21/0555; A63B21/0557; A63B21/06; A63B21/068; A63B22/00; A63B22/20; A63B2208/00; A63B2208/02; A63B2208/0204
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
210 words
Muscle toning apparatus for use in developing the upper legs comprising: first and second platforms each being large enough to support the foot of an intended user, and roller means affixed to the lower surface of said first and second platforms for supporting only said platforms and the user above a flat surface in lateral displaceable translational relationship thereover, said roller means consisting of rollers that directly engage a flat surface that supports the platforms and the user, said roller means being so constructed as to constrain any relative lateral displacement of said platforms only along a single straight line direction of lateral translational movement of said platforms, and resilient means connecting said first and second platforms and positioning said platforms adjacent each other so as to permit said platforms to be rollably displaced laterally away from each other along said single straight line direction of movement under the force of the legs of the user opposed by the force necessary for expanding said resilient means and then rollably returned back toward each other under the force of the legs of the user aided by the force available from contracting said resilient means, said resilient means being free and unsupported between the platforms when said resilient means is under tension.
Claim 2
Dependent Claim
210 words
Muscle toning apparatus for use in developing the upper legs comprising: first and second platforms each being large enough to support the foot of an intended user, and roller means affixed to the lower surface of said first and second platforms for supporting only said platforms and the user above a flat surface in lateral displaceable translational relationship thereover, said roller means consisting of rollers that directly engage a flat surface that supports the platforms and the user, said roller means being so constructed as to constrain any relative lateral displacement of said platforms only along a single straight line direction of lateral translational movement of said platforms, and resilient means connecting said first and second platforms and positioning said platforms adjacent each other so as to permit said platforms to be rollably displaced laterally away from each other along said single straight line direction of movement under the force of the legs of the user opposed by the force necessary for expanding said resilient means and then rollably returned back toward each other under the force of the legs of the user aided by the force available from contracting said resilient means, said resilient means being free and unsupported between the platforms when said resilient means is under tension.
Claim 3
Dependent Claim
38 words
Muscle toning apparatus as recited in claim 1 wherein said resilient means is expandable only a predetermined amount, said predetermined amount being selected so as to limit the separation of said platforms to less than a selected distance.
Claim 4
Dependent Claim
69 words
Muscle toning apparatus as recited in claim 2 in which said first and said second platforms include, guide means disposed adjacent to facing sides of each of said platforms, and fastening means disposed outwardly of each of said guide means, and wherein said resilient means is comprised of a pair of elastic elements which are threaded through said guide means and have their ends secured to said fastening means.
Claim 5
Dependent Claim
18 words
Muscle toning apparatus as recited in claim 3 wherein each elastic element is formed of a shock cord.
Claim 6
Dependent Claim
147 words
A muscle toning apparatus comprising: a first rollable platform means, movement of said first platform means being unrestrained by applied lateral forces to any of its sides, said first platform means including roller means attached only to the bottom thereof for displaceably supporting said first platform and a user above a flat surface; second rollable platform means, movement of said second platform means being unrestrained by applied lateral forces to any of its sides, said second platform means including roller means attached only to the bottom thereof for displaceably supporting said second platform and a user above a flat surface; and resilient means connecting said first and second platform and positioning said platforms adjacent one another, said resilient means being free and unsupported between the platforms when said resilient means is under tension, said resilient means including limit means to limit platform separating to a predetermined distance.
Claim 7
Dependent Claim
147 words
A muscle toning apparatus comprising: a first rollable platform means, movement of said first platform means being unrestrained by applied lateral forces to any of its sides, said first platform means including roller means attached only to the bottom thereof for displaceably supporting said first platform and a user above a flat surface; second rollable platform means, movement of said second platform means being unrestrained by applied lateral forces to any of its sides, said second platform means including roller means attached only to the bottom thereof for displaceably supporting said second platform and a user above a flat surface; and resilient means connecting said first and second platform and positioning said platforms adjacent one another, said resilient means being free and unsupported between the platforms when said resilient means is under tension, said resilient means including limit means to limit platform separating to a predetermined distance.
Claim 8
Dependent Claim
61 words
Muscle toning apparatus as recited in claim 5 in which each platform further includes, guide means disposed on facing sides of each of said platforms, and fastening means disposed outwardly of said guide means, and wherein said resilient means is comprised of at least one elastic member threaded through said guide means and having its ends secured to said fastening means.
Claim 9
Dependent Claim
18 words
Muscle toning apparatus as recited in claim 6 wherein said elastic element is formed of a shock cord.
References Cited (Backward Citations)
US430808A
Cited
US1909190A
Cited
US2455274A
Cited
GB675742A
Cited
US2700317A
Cited
US3068003A
Cited
US3369809A
Cited
US3421760A
Cited
US3443809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |