Patent US3895794A successfully refreshed from Google Patents.
US3895794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rollable fulcrum balancing board recreational and exercise device provided with non-linear stabilization features
Assignee: Individual
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Filing: 1973-08-15
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Granted: 1975-07-22
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Expires: 1993-08-15
Abstract
Abstract A balancing board recreational device in which a fulcruming roller is confined within a cavity formed by a protuberant center portion occupying about two - thirds of the length of the balancing board. The undersurface of the protuberant center portion defines a long arc concave surface gently sloping away from the apex thereof to form motion slowing surfaces for the fulcruming roller. This fulcruming roller is a cylindrically shaped fulcrum analogous to a log. Outwardly from either end of the protuberant center portion, the balancing board is provided with upturned ends which form foot positioning trenches therefor.
Inventors
- 👤 Will Clarke England
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:20
CPC Classifications
A; A63; A63B; A63B22/00; A63B22/16; B; B62; B62K; B62K1/00; A63B22/20; A63B2208/00; A63B2208/12; A63G; A63G23/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
183 words
A teeter-totter balancing recreational device provided with non linear stabilization features comprising: A. a cylindrical shaped fulcruming roller having a uniform diametral cross-section from end to end of the roller and adapted to roll across a horizontal surface; B. a rigid elongated non-linear balancing board adapted to cover and ride on said cylindrical roller and having 1. a uniform width slightly greater than the length of the cylindrical shaped fulcruming roller with which it must coact, 2. a length approximating the distance from the heel to the hip joint of the rider for whom the balancing device is designed, having a. a protuberant center portion occupying about two-thirds of the length of said balancing board, and b. upturned ends forming a foot positioning trench at either end of said balancing board, 3. vertical side wall boards extending along each side of the protuberant center portion of said balancing board; and C. the undersurface of said protuberant center portion of said balancing board defining a long arc concave surface gently sloping away from the apex of the concave enclosure to form motion slowing surfaces.
Claim 2
Dependent Claim
183 words
A teeter-totter balancing recreational device provided with non linear stabilization features comprising: A. a cylindrical shaped fulcruming roller having a uniform diametral cross-section from end to end of the roller and adapted to roll across a horizontal surface; B. a rigid elongated non-linear balancing board adapted to cover and ride on said cylindrical roller and having 1. a uniform width slightly greater than the length of the cylindrical shaped fulcruming roller with which it must coact, 2. a length approximating the distance from the heel to the hip joint of the rider for whom the balancing device is designed, having a. a protuberant center portion occupying about two-thirds of the length of said balancing board, and b. upturned ends forming a foot positioning trench at either end of said balancing board, 3. vertical side wall boards extending along each side of the protuberant center portion of said balancing board; and C. the undersurface of said protuberant center portion of said balancing board defining a long arc concave surface gently sloping away from the apex of the concave enclosure to form motion slowing surfaces.
Claim 3
Dependent Claim
54 words
a length approximating the distance from the heel to the hip joint of the rider for whom the balancing device is designed, having a. a protuberant center portion occupying about two-thirds of the length of said balancing board, and b. upturned ends forming a foot positioning trench at either end of said balancing board,
Claim 4
Dependent Claim
54 words
a length approximating the distance from the heel to the hip joint of the rider for whom the balancing device is designed, having a. a protuberant center portion occupying about two-thirds of the length of said balancing board, and b. upturned ends forming a foot positioning trench at either end of said balancing board,
Claim 5
Dependent Claim
56 words
The teeter-totter balancing recreational device described in claim 1 with a ratio of the radii of curvature of the concave under surface of the center portion of said balancing board having a range of four to one to ten to one times the radius of the cylindrical shaped fulcruming roller on which the balancing board rides.
Claim 6
Dependent Claim
38 words
The teeter-totter balancing recreational device described in claim 1 with the undersurface of the protuberant center portion of said balancing board being provided with a coating of frictionizing material to further slow the action of the balancing board.
Claim 7
Dependent Claim
51 words
vertical side wall boards extending along each side of the protuberant center portion of said balancing board; and C. the undersurface of said protuberant center portion of said balancing board defining a long arc concave surface gently sloping away from the apex of the concave enclosure to form motion slowing surfaces.
Claim 8
Dependent Claim
51 words
vertical side wall boards extending along each side of the protuberant center portion of said balancing board; and C. the undersurface of said protuberant center portion of said balancing board defining a long arc concave surface gently sloping away from the apex of the concave enclosure to form motion slowing surfaces.
Claim 9
Dependent Claim
31 words
The teeter-totter balancing recreational device described in claim 1 with the cylindrical fulcruming roller being provided with a coating of frictionizing material to further slow the action of the balancing board.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |