US4286806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller skating spark generator
Assignee: Individual
•
Filing: 1980-03-06
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Granted: 1981-09-01
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Expires: 2000-03-06
Abstract
Abstract A spark-generating mechanism for mounting on, and for use in combination with, a roller skate or roller skateboard. The mechanism includes a support bracket adapted to be attached to the skating device, to carry rotatably a grindstone wheel between two larger actuating wheels and to hold a spark producing element in resilient contact with the grindstone wheel. Positioned to be inoperative during normal skating, the spark-generating mechanism may be actuated at will by the skater's slightly backward tilting of the roller skating device while in motion.
Inventors
- 👤 David Bergstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:33
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/02; A63C17/004; A63C17/26; A63C2203/00; A63C2203/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
In combination with a conventional roller skating device having a screw in its wheel support structure, a spark-generating mechanism which comprises: an axle; a grindstone wheel, centrally and fixedly mounted on said axle; a pair of actuating wheels of a diameter larger than the diameter of said grindstone wheel, said actuating wheels being fixedly mounted on said axle on either side of said grindstone wheel; a spark-producing element held resiliently in contact with the peripheral end surface of said grindstone wheel; and bracket support means for journalling the ends of said axle for free rotation, for holding said spark-producing element against said grindstone wheel, and for attaching the entire spark-generating mechanism with the screw of the wheel support structure of the roller skating device.
Claim 2
Dependent Claim
124 words
In combination with a conventional roller skating device having a screw in its wheel support structure, a spark-generating mechanism which comprises: an axle; a grindstone wheel, centrally and fixedly mounted on said axle; a pair of actuating wheels of a diameter larger than the diameter of said grindstone wheel, said actuating wheels being fixedly mounted on said axle on either side of said grindstone wheel; a spark-producing element held resiliently in contact with the peripheral end surface of said grindstone wheel; and bracket support means for journalling the ends of said axle for free rotation, for holding said spark-producing element against said grindstone wheel, and for attaching the entire spark-generating mechanism with the screw of the wheel support structure of the roller skating device.
Claim 3
Dependent Claim
15 words
Spark-generating mechanism in accordance with claim 1, wherein said spark-producing element is a steel button.
Claim 4
Dependent Claim
14 words
Spark-generating mechanism in accordance with claim 1, wherein said spark-producing element is a flint.
Claim 5
Dependent Claim
167 words
Spark-generating mechanism in accordance with claim 1, said bracket support means having a notch, substantially semi-circular in shape and centrally disposed at one end of said bracket support means, for accomodating and engaging in the shank of the screw in the wheel support structure of the roller skating device; said bracket support means also comprising: a pair of depending flanges, immediately adjacent to and flanking said notch, for locking engagement with the head of the screw in the wheel support structure of the roller skating device; and the end of said bracket support means opposite said pair of depending flanges being of trifurcated configuration, each of the two outer projections being rolled over at its end to form a journal for mounting one end of said axle for free rotation, the center projection being angled downwardly with respect to the plane of said bracket support means and having a bore near its free end for holding said spark-producing element in resilient frictional contact with said grindstone wheel.
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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |