US4679814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Randomly oriented reinforcing fibers in a snow ski
Assignee: SITCA ACQUISITIONS Inc (SITCA) A CORP OF WA
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Filing: 1985-12-03
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Granted: 1987-07-14
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Expires: 2005-12-03
Abstract
Abstract In a downhill snow ski there is provided at least one torsional reinforcing layer intermediate to the top and the bottom running surface and generally parallel thereto formed from fibers of high elastic modulus which are randomly oriented in a matrix material to increase the torsional stiffness of the ski.
Inventors
- 👤 Franklin D. Meatto
- 👤 Edward D. Pilpel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:46
CPC Classifications
A; A63; A63C; A63C5/00; A63C5/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
151 words
In a snow ski of predetermined length having a core formed from a predetermined material, a top surface, a bottom running surface bounded on its opposing sides by metal edges, and a first side and a second opposing side positioned generally perpendicularly to the top and bottom surfaces and intermediate thereof, the improvement comprising: at least one isotropic torsional reinforcing precured planar laminate layer intermediate the top surface and bottom running surface and generally parallel thereto extending laterally at least partially between the first side and the second opposing side and longitudinally extending substantially over the predetermined length of the ski, the at least one isotropic torsional reinforcing precured planar laminate layer being independent of the core and formed from fibers of high elastic modulus suspended in a matrix of predetermined material, the fibers being oriented randomly therein to thereby permit the torsional stiffness of the structure to be selectively predetermined.
Claim 2
Dependent Claim
151 words
In a snow ski of predetermined length having a core formed from a predetermined material, a top surface, a bottom running surface bounded on its opposing sides by metal edges, and a first side and a second opposing side positioned generally perpendicularly to the top and bottom surfaces and intermediate thereof, the improvement comprising: at least one isotropic torsional reinforcing precured planar laminate layer intermediate the top surface and bottom running surface and generally parallel thereto extending laterally at least partially between the first side and the second opposing side and longitudinally extending substantially over the predetermined length of the ski, the at least one isotropic torsional reinforcing precured planar laminate layer being independent of the core and formed from fibers of high elastic modulus suspended in a matrix of predetermined material, the fibers being oriented randomly therein to thereby permit the torsional stiffness of the structure to be selectively predetermined.
Claim 3
Dependent Claim
20 words
The apparatus according to claim 1 wherein the at least one torsional reinforcing layer is located immediately above the core.
Claim 4
Dependent Claim
29 words
The apparatus according to claim 2 wherein the at least one isotropic torsional reinforcing precured planar laminate layer extends continuously between the first side and the second opposing side.
Claim 5
Dependent Claim
33 words
The apparatus according to claim 2 wherein the at least one isotropic torsional reinforcing precured planar laminate layer extends continuously outwardly to form part of the first side and the opposing second side.
Claim 6
Dependent Claim
23 words
The apparatus according to claim 1 wherein the at least one isotropic torsional reinforcing precured planar laminate layer lies immediately below the core.
Claim 7
Dependent Claim
28 words
The apparatus according to claim 5 wherein the at least one isotropic torsional reinforcing precured planar laminate layer lies immediately above a high modulus of elasticity facing layer.
Claim 8
Dependent Claim
29 words
The apparatus according to claim 6 wherein the at least one isotropic torsional reinforcing precured planar laminate layer extends continuously between the first side and the second opposing side.
Claim 9
Dependent Claim
33 words
The apparatus according to claim 6 wherein the at least one isotropic torsional reinforcing precured planar laminate layer extends continuously outwardly to form part of the first side and the opposing second side.
Claim 10
Dependent Claim
31 words
The apparatus according to claim 1 wherein the snow ski further comprises a high modulus of elasticity facing and a rubber layer, respectively, between the core and the bottom running surface.
Claim 11
Dependent Claim
18 words
The apparatus according to claim 9 wherein the bottom running surface is formed at least partially from polyethylene.
Claim 12
Dependent Claim
18 words
The apparatus according to claim 10 wherein the core is further comprised of birch wood and aspen wood.
Claim 13
Dependent Claim
15 words
The apparatus according to claim 11 wherein the fibers of high elastic modulus are fiberglass.
Claim 14
Dependent Claim
15 words
The apparatus according to claim 11 wherein the fibers of high elastic modulus are graphite.
Claim 15
Dependent Claim
26 words
The apparatus according to claim 1 whereby the torsional stiffness may be designably varied by changing the thickness of the at least one torsional reinforcing layer.
Claim 16
Dependent Claim
25 words
The apparatus according to claim 1 whereby the torsional stiffness may be designably varied by changing the randomly oriented fibers of high elastic modulus employed.
Claim 17
Dependent Claim
27 words
The apparatus according to claim 1 whereby the torsional stiffness may be designably varied by changing the matrix material in which the randomly oriented fibers are suspended.
Claim 18
Dependent Claim
27 words
The apparatus according to claim 1 further comprising a first torsional reinforcing layer located above the core and a second torsional reinforcing layer located below the core.
Claim 19
Dependent Claim
30 words
The apparatus according to claim 1 wherein the at least one torsional reinforcing layer has an average flexural modulus of between about 1.75×10 6 psi and about 2.5×10 6 psi.
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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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |