US3897074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ski with microporous bottom surface
Assignee: Karhu Titan Oy
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Filing: 1974-02-22
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Granted: 1975-07-29
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Expires: 1994-02-22
Abstract
Abstract A ski including an elongated relatively narrow strip having a normally upwardly directed surface to be engaged by a ski boot and a normally downwardly directed opposed surface, the ski including a bottom layer which is fixed to the strip and engages and covers the opposed surface thereof, this bottom layer being composed for the most part of a plastic in which hollow tubular fibers are embedded with some of the fibers being exposed at a surface of the bottom layer which is directed away from the strip to provide the latter surface of the bottom layer with a microporous structure. During manufacture the bottom layer composed for the most part of plastic in which the hollow tubular fibers are embedded is applied to the bottom surface of the strip and while being pressed against the bottom surface of the strip is cured to form a plate fixed to the bottom surface of the strip. The bottom layer is then ground at its surface which is directed away from the strip to expose fibers at the ground surface, thus giving the latter surface a microporous structure.
Inventors
- 👤 Antti-Jussi Tiitola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:37
CPC Classifications
A; A63; A63C; A63C5/00; A63C5/04; A63C5/056
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
In a ski, an elongated narrow strip having one surface which is normally directed upwardly to be engaged by a ski boot and an opposed surface which is normally directed downwardly toward the ground, and a bottom layer fixed to said strip and engaging and covering said opposed surface thereof, said bottom layer being comprised for the most part of a plastic material in which short tubular fibers are embedded with random orientations, said tubular fibers having internal capillary passages and including at a surface of said bottom layer which is normally directed downwardly away from said strip a number of fibers which are flush with and have their passages exposed at said surface of said bottom layer to provide the latter surface with a microporous structure.
Claim 2
Dependent Claim
127 words
In a ski, an elongated narrow strip having one surface which is normally directed upwardly to be engaged by a ski boot and an opposed surface which is normally directed downwardly toward the ground, and a bottom layer fixed to said strip and engaging and covering said opposed surface thereof, said bottom layer being comprised for the most part of a plastic material in which short tubular fibers are embedded with random orientations, said tubular fibers having internal capillary passages and including at a surface of said bottom layer which is normally directed downwardly away from said strip a number of fibers which are flush with and have their passages exposed at said surface of said bottom layer to provide the latter surface with a microporous structure.
Claim 3
Dependent Claim
13 words
The combination of claim 1 and wherein said plastic is a thermosetting plastic.
Claim 4
Dependent Claim
12 words
The combination of claim 2 and wherein said fibers are cellulose fibers.
Claim 5
Dependent Claim
13 words
The combination of claim 3 and wherein said plastic is an epoxy resin.
Claim 6
Dependent Claim
36 words
The combination of claim 4 and wherein said cellulose fibers and epoxy resin respectively form 50% and 45% by volume of said bottom layer while the remainder thereof includes 5% by volume of fillers and pigmEnts.
Claim 7
Dependent Claim
19 words
The combination of claim 5 and wherein said bottom layer has a thickness on the order of 0.5-1 mm.
Claim 8
Dependent Claim
19 words
The combination of claim 1 and wherein said bottom layer has a thickness on the order of 0.5-1 mm.
Claim 9
Dependent Claim
116 words
In a method of manufacturing a ski, the steps of applying to a normally downwardly directed bottom surface of a ski strip a layer comprised for the most part of plastic with short hollow tubular fibers embedded with random orientations therein, pressing said layer against said strip with a given pressure while curing said layer to form therefrom a plate which is fixed to said bottom surface of said strip, and then grinding a surface of said layer which is normally directed downwardly away from said strip to expose the hollow interior of some of the fibers at the ground surface of said layer so as to provide the latter surface thereof with a microporous structure.
Claim 10
Dependent Claim
116 words
In a method of manufacturing a ski, the steps of applying to a normally downwardly directed bottom surface of a ski strip a layer comprised for the most part of plastic with short hollow tubular fibers embedded with random orientations therein, pressing said layer against said strip with a given pressure while curing said layer to form therefrom a plate which is fixed to said bottom surface of said strip, and then grinding a surface of said layer which is normally directed downwardly away from said strip to expose the hollow interior of some of the fibers at the ground surface of said layer so as to provide the latter surface thereof with a microporous structure.
Claim 11
Dependent Claim
39 words
In a method as recited in claim 8 and including the step of regulating the pressure applied to said layer during curing thereof for controlling the proportions by volume of said plastic and fibers with respect to each other.
References Cited (Backward Citations)
US2908506A
Cited
US3178194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |