US3894745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ski body made of plastics
Assignee: Hoechst AG
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Filing: 1973-08-31
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Granted: 1975-07-15
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Expires: 1993-08-31
Abstract
Abstract There is disclosed and claimed a novel ski body made of plastics, which consists of at least two parts with equal or different length, width and thickness, depending on the dimensions of the complete ski, the number of parts and the dimensions of the respective other parts. These parts are arranged in the form of layers one on top of the other. All parts of the ski body are able to bear mechanical stress.
Inventors
- 👤 Peter Heim
- 👤 Dietrich Schleede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:26
CPC Classifications
A; A63; A63C; A63C5/00; A63C5/12; A63C5/126
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A ski body forming substantially the entire ski and adapted to bear all of the mechanical stresses in the ski during use comprising at least two independently formed plastic layers having generally complementary surface portions located adjacent each other and secured in superimposed relation to one another with one layer being on top of the other; at least one elongated reinforcing element between said layers for absorbing torsional and bending forces in the ski when in use; at least one of said generally complementary surfaces having at least one elongated recess formed therein which receives said reinforcing element; said one generally complementary surface having a plurality of longitudinal recess formed therein having generally semicylindrical configurations opening towards the other of said complementary surfaces and said reinforcing element comprising a plate having generally semicylindrical corrugations formed therein and received in said recesses, said plate having a plurality of apertures formed therein between said corrugations and said layers being joined to each other through said apertures.
Claim 2
Dependent Claim
164 words
A ski body forming substantially the entire ski and adapted to bear all of the mechanical stresses in the ski during use comprising at least two independently formed plastic layers having generally complementary surface portions located adjacent each other and secured in superimposed relation to one another with one layer being on top of the other; at least one elongated reinforcing element between said layers for absorbing torsional and bending forces in the ski when in use; at least one of said generally complementary surfaces having at least one elongated recess formed therein which receives said reinforcing element; said one generally complementary surface having a plurality of longitudinal recess formed therein having generally semicylindrical configurations opening towards the other of said complementary surfaces and said reinforcing element comprising a plate having generally semicylindrical corrugations formed therein and received in said recesses, said plate having a plurality of apertures formed therein between said corrugations and said layers being joined to each other through said apertures.
Claim 3
Dependent Claim
34 words
The ski body as defined in claim 1 wherein said plastic layers are formed of a foamed plastic material having a large cell core of low density and a marginal zone of high density.
Claim 4
Dependent Claim
27 words
The ski body as defined in claim 1 wherein said plastic layers are formed from plastic materials selected from the group consisting of thermoplastic and/or duroplastic materials.
Claim 5
Dependent Claim
18 words
The ski body as defined in claim 3 wherein said plastic layers are formed of different plastic materials.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |