Patent US3995873A successfully refreshed from Google Patents.
US3995873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skateboard
Assignee: Individual
•
Filing: 1975-11-17
•
Granted: 1976-12-07
•
Expires: 1995-11-17
Abstract
Abstract The skateboard includes only one forward roller and one rearward roller both of sufficient width to provide stability. Each roller is rotatably supported by a combined fork and fender member which in turn is supported to the underside of the board in a manner to permit swivelling about a journal axis formed at an angle to the longitudinal axis of the board. A cantilevered leaf spring in the main frame portion cooperates with a pinion in the journal for the swivel axis to return the roller to a neutral position.
Inventors
- 👤 Richard Cloutier Pantzar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:04
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/01; A63C17/011; A63C17/012; A63C17/014; A63C17/016
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
376 words
A skateboard including an elongated board having a given width and length at least three times said width and front and rear roller means disposed beneath forward and rearward underside portions of said board, each of said roller means comprising, in combination: a. a main supporting trunnion frame rigidly secured to the underside of the board and defining spaced coaxial trunnion openings on a journalling axis extending downwardly from the underside of the board and inwardly towards a point space below the center of the board to define an acute angle with the longitudinal axis of the board lying in a vertical plane; b. a roller; c. a fork-fender member having a fork portion rotatably supporting said roller and a fender portion covering a portion of the periphery of said roller and including means defining spaced oppositely directed coaxial pinions lying on an axis oriented at right angles to the axis of rotation of said roller and spaced therefrom, said pinions being receivable in and supported by said trunnion openings so that said fork-fender member can swivel about said journalling axis whereby when a skater places more weight on one longitudinal edge portion of the board than the other to tilt the board, each of the fork-fender members are caused to swivel in opposite directions simultaneously from neutral positions to turn the forward roller towards the direction of the tilt and the rearward roller in an opposite direction as viewed in plan to thereby cause the skateboard to follow a curved path, the radius of the curve in a direction towards the center of the curve being in the direction of the tilt; and d. a leaf spring positioned in said main frame and spaced from the underside of the board in a position juxtaposed to one of said pinions, said one of said pinions having a flattened side engaging said leaf spring when said board is level so that said fork-fender member is in its neutral position, swivelling of the fork-fender member causing said one pinion to cam said leaf spring towards the underside of said board so that a bias force is exerted on an edge of the flattened portion of said one pinion tending to return the fork-fender member to its neutral position.
Claim 2
Dependent Claim
376 words
A skateboard including an elongated board having a given width and length at least three times said width and front and rear roller means disposed beneath forward and rearward underside portions of said board, each of said roller means comprising, in combination: a. a main supporting trunnion frame rigidly secured to the underside of the board and defining spaced coaxial trunnion openings on a journalling axis extending downwardly from the underside of the board and inwardly towards a point space below the center of the board to define an acute angle with the longitudinal axis of the board lying in a vertical plane; b. a roller; c. a fork-fender member having a fork portion rotatably supporting said roller and a fender portion covering a portion of the periphery of said roller and including means defining spaced oppositely directed coaxial pinions lying on an axis oriented at right angles to the axis of rotation of said roller and spaced therefrom, said pinions being receivable in and supported by said trunnion openings so that said fork-fender member can swivel about said journalling axis whereby when a skater places more weight on one longitudinal edge portion of the board than the other to tilt the board, each of the fork-fender members are caused to swivel in opposite directions simultaneously from neutral positions to turn the forward roller towards the direction of the tilt and the rearward roller in an opposite direction as viewed in plan to thereby cause the skateboard to follow a curved path, the radius of the curve in a direction towards the center of the curve being in the direction of the tilt; and d. a leaf spring positioned in said main frame and spaced from the underside of the board in a position juxtaposed to one of said pinions, said one of said pinions having a flattened side engaging said leaf spring when said board is level so that said fork-fender member is in its neutral position, swivelling of the fork-fender member causing said one pinion to cam said leaf spring towards the underside of said board so that a bias force is exerted on an edge of the flattened portion of said one pinion tending to return the fork-fender member to its neutral position.
Claim 3
Dependent Claim
85 words
A skateboard according to claim 1, in which said roller is a sole roller of width in the axial direction of the roller at least equal to one half the width of said board such that the rollers for the skateboard consist solely of two, one in a forward position and one in a rearward position, and such that each journallng axis is in a vertical plane which bisects the rollers when the board is level and said fork-fender members are in their neutral positions.
Claim 4
Dependent Claim
71 words
A skateboard according to claim 1, in which said leaf spring is cantilevered and wherein there is provided a slide block between a portion of said leaf spring and the underside of said board, said slide block being movable towards the free end of said cantilevered leaf spring to effectively change the length of the free end and thereby the biasing force exerted by the leaf spring on said one pinion.
Claim 5
Dependent Claim
58 words
A skateboard according to claim 1, in which the fender portion of said fork-fender member is of cylindrical shape to cover between one-fourth and one-half the upper periphery of said roller in coaxial relation thereto, the fork portion constituting side plates at the ends of said cylindrical shape, said roller having an axle supported in said side plates.
References Cited (Backward Citations)
US93110A
Cited
US305434A
Cited
US317501A
Cited
US622218A
Cited
US1987668A
Cited
US3362722A
Cited
US3622172A
Cited
US3795409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |