US3854739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skis with steering strings
Assignee: Unitika Ltd
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Filing: 1973-07-30
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Granted: 1974-12-17
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Expires: 1993-07-30
Abstract
Abstract This specification discloses skis having the following characteristics: (1) an upwardly curved front tip, (2) an uncurved sliding surface, (3) a steering string attached to the curved front tip, (4) a boot heel binding near the tail end of the ski plate so as to place the center of the body weight near the tail end of the ski, (5) overall length which is remarkably shorter than that of conventional skis, and (6) gradually increasing thickness from the front tip to the tail end.
Inventors
- 👤 T Toda
- 👤 K Kimizuka
- 👤 I Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:41
CPC Classifications
A; A63; A63C; A63C11/00; A63C11/10; A63C5/00; A63C5/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
A ski adapted to support a single foot, said ski having the following characteristics: a. an upwardly curved front tip; b. an uncurved sliding surface; c. a steering string attached to the curved front tip; d. a boot heel binding mounted on the ski plate near its tail end so as to place the center of the body weight near the tail end of the ski; e. overall length which is remarkably shorter than that of conventional skis; and f. gradually increasing thickness from the front tip to the tail end.
Claim 2
Dependent Claim
91 words
A ski adapted to support a single foot, said ski having the following characteristics: a. an upwardly curved front tip; b. an uncurved sliding surface; c. a steering string attached to the curved front tip; d. a boot heel binding mounted on the ski plate near its tail end so as to place the center of the body weight near the tail end of the ski; e. overall length which is remarkably shorter than that of conventional skis; and f. gradually increasing thickness from the front tip to the tail end.
Claim 3
Dependent Claim
31 words
A ski as claimed in claim 1 wherein the length of the ski is between 30 and 80 cm and the width of the ski is between 8 and 15 cm.
Claim 4
Dependent Claim
28 words
A ski as claimed in claim 1 wherein the thickness of the ski gradually increases from 0.5-0.8 cm at the tip to 1.5-2.2 cm at the tail end.
Claim 5
Dependent Claim
37 words
A ski as claimed in claim 1 wherein the overall height of the ski from the bottom of the uncurved sliding surface to the top of the upwardly curved front tip is between 8 and 13 cm.
Claim 6
Dependent Claim
43 words
A ski as claimed in claim 1 wherein the boot heel binding is mounted on the ski plate in such a position as to place the rear end of the boot heel 2 to 5 cm from the tail end of the ski.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |