US4621825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillating skateboard
Assignee: Individual
•
Filing: 1984-06-06
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Granted: 1986-11-11
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Expires: 2004-06-06
Abstract
Abstract This invention relates to a new and improved skateboard of the type enabling the user to stand on the platform and shift his weight thereon to effect the forward motion of the skate board. The skate board may also be modified to be used as a weight carrier, in which the weight is loaded on the platform and the platform is oscillated.
Inventors
- 👤 Robert E. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:56
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/01; A63C17/014; A63C17/26; A63C17/265; B; B62; B62M; B62M1/00; F; F16; F16H; F16H1/00; F16H1/02; F16H1/04; F16H1/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
In a skateboard for supporting a user and adapted to be propelled by oscillatory motion of the user's body, comprising a suitable footboard, having a curved rack mounted on said footboard, said rack having a plurality of teeth on its surface, a support boss extending below said footboard along a central vertical axis thereof, said support boss having an integral spindle at its upper end, bearing means for rotatably supporting said footboard with respect to said support boss, said support boss having an aperture means through its lower portion for receiving the inner ends of two independently rotatable diametrically opposite axles, a clutched pinion secured to each said axle for engagement with said rack, a wheel means secured to the outer end of each said axle, and castors suitably secured to said footboard.
Claim 2
Dependent Claim
133 words
In a skateboard for supporting a user and adapted to be propelled by oscillatory motion of the user's body, comprising a suitable footboard, having a curved rack mounted on said footboard, said rack having a plurality of teeth on its surface, a support boss extending below said footboard along a central vertical axis thereof, said support boss having an integral spindle at its upper end, bearing means for rotatably supporting said footboard with respect to said support boss, said support boss having an aperture means through its lower portion for receiving the inner ends of two independently rotatable diametrically opposite axles, a clutched pinion secured to each said axle for engagement with said rack, a wheel means secured to the outer end of each said axle, and castors suitably secured to said footboard.
Claim 3
Dependent Claim
166 words
In a weight carrier propelled by the shifting of weight, including a suitable platform member for supporting said weight, a curved rack mounted about the said platform, said rack having a plurality of teeth on one surface, a support boss extending below said platform along a central vertical axis thereof, said support boss having an integral spindle at its upper end, bearing means for rotatably supporting said platform with respect to said support boss, said support boss having a suitable aperture means through its lower portion for receiving the oscillating and rotatable axle, clutched pinions secured to the axle for engagement with said rack, suitable wheels secured to the outer ends of said axle in a driving relationship with the pinions and the axle, wherein as the platform is rotated, the forwardly rotated clutched pinion is in driving engagement with the axle while the rearwardly rotated clutched pinion is disengaged from the axle; and a castor means suitably secured to the underside of the said platform.
Claim 4
Dependent Claim
166 words
In a weight carrier propelled by the shifting of weight, including a suitable platform member for supporting said weight, a curved rack mounted about the said platform, said rack having a plurality of teeth on one surface, a support boss extending below said platform along a central vertical axis thereof, said support boss having an integral spindle at its upper end, bearing means for rotatably supporting said platform with respect to said support boss, said support boss having a suitable aperture means through its lower portion for receiving the oscillating and rotatable axle, clutched pinions secured to the axle for engagement with said rack, suitable wheels secured to the outer ends of said axle in a driving relationship with the pinions and the axle, wherein as the platform is rotated, the forwardly rotated clutched pinion is in driving engagement with the axle while the rearwardly rotated clutched pinion is disengaged from the axle; and a castor means suitably secured to the underside of the said platform.
References Cited (Backward Citations)
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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) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |