US3727936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ski of shaped laminated material and method for its manufacture
Assignee: VYZKUMNY USTAV STROJIRENSKE TECHNOLOGIE A EKONOMIKY
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Filing: 1970-05-18
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Granted: 1973-04-17
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Expires: 1990-05-18
Abstract
Abstract A ski of shaped laminated material made as a hollow closed beam with integral walls with at least one longitudinal groove formed in the upper wall, housing a reinforcing strip. The ski being manufactured by applying a yielding fabric soaked with hardenable resin on a resilient hose, placing the whole into a mould and buildings up pressure in said hose under simultaneous heating to the hardening temperature.
Inventors
- 👤 J Klir
- 👤 B Svoboda
- 👤 J Bohac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:55
CPC Classifications
A; A63; A63C; A63C5/00; A63C5/12; B; B60; B60G; B60G2206/00; B60G2206/01; B60G2206/10; B60G2206/16; B60G2206/162; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/2457; Y10T428/24744
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
The article according to claim 1, wherein said core is provided with a plurality of longitudinal grooves, at least one of said grooves having a dovetail cross-sectional profile and the separate insert secured therein having uneven side walls engaging therewith.
Claim 2
Dependent Claim
28 words
The article according to claim 2, wherein at least one of said longitudinal grooves has a separate insert secured therein spaced from the bottom of said respective groove.
Claim 3
Dependent Claim
40 words
The article according to claim 1, including at least one additional integral layer of fabric adhered, at least in part, to the fabric layer surrounding the hose, to thereby form at least a portion of the walls of said beam.
Claim 4
Dependent Claim
63 words
The article according to claim 2, wherein said article is a ski and said profiled grooves are parallel to the longitudinal axis of the ski and arranged along the whole length of the ski, the depth of each of the grooves decreasing from the foot board of the ski to the front and rear end in dependence on the thickness of the ski.
Claim 5
Dependent Claim
30 words
The article according to claim 2, wherein said article is a ski and at least one of the profiled grooves is parallel with the lateral Telemark curves of the ski.
Claim 6
Dependent Claim
31 words
The ski according to claim 6, wherein an odd number of grooves and inserts are formed in said beam, the central one of which lies along the axis of said ski.
Claim 7
Dependent Claim
31 words
A ski formed according to claim 6, wherein at least one of said grooves rises toward the foot board so as to coincide thereat with the upper wall of said beam.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |