Patent US1095966A successfully refreshed from Google Patents.
US4386982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a water ski construction
Assignee: ThyssenKrupp Budd Co
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Filing: 1981-08-24
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Granted: 1983-06-07
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Expires: 2001-08-24
Abstract
Abstract A water ski formed of molded upper and lower shells made of sheet molding compound which have mating and overlapping flanges around the entire perimeter of the shells which are bonded together to form a buoyancy chamber. In one embodiment, the chamber is filled with polymerized foam and in another embodiment longitudinally extending ribs are formed to maintain the upper and lower surfaces of the shells in spaced relationship to each other.
Inventors
- 👤 Harold R. Weinhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:33
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B5/20; B32B7/00; B32B7/04; B32B7/12; B63; B63B; B63B32/00; B63B32/30; B63B32/57; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/239; Y10T428/24; Y10T428/24149; Y10T428/24157
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
193 words
The method of forming a ski having matching top and bottom parts forming a cavity filled with foam core material, comprising the steps of forming a top ski part having a depending continuous flange at its perimeter, forming a lower ski part having an upwardly extending continuous flange having a trough therein spaced from said depending flange and having a surface complementary to a surface of said depending flange of said top ski part, positioning said bottom part horizontally, applying a coating of adhesive to the inner surface of said upwardly extending flange, applying a predetermined amount of foam resin to the cavity formed by said bottom part and said upwardly extending flange, placing said top part in mating relationship to said bottom part with said complementary surfaces of said depending flange and upwardly extending flange in adjacent abutting relationship to each other to form a cavity with excess adhesive between depending flange and said upwardly extending flange being received in said trough, and placing said top and bottom parts in a fixture to hold said top and bottom parts relative to each other while the foam resin expands and the adhesive cures.
Claim 2
Independent Claim
193 words
The method of forming a ski having matching top and bottom parts forming a cavity filled with foam core material, comprising the steps of forming a top ski part having a depending continuous flange at its perimeter, forming a lower ski part having an upwardly extending continuous flange having a trough therein spaced from said depending flange and having a surface complementary to a surface of said depending flange of said top ski part, positioning said bottom part horizontally, applying a coating of adhesive to the inner surface of said upwardly extending flange, applying a predetermined amount of foam resin to the cavity formed by said bottom part and said upwardly extending flange, placing said top part in mating relationship to said bottom part with said complementary surfaces of said depending flange and upwardly extending flange in adjacent abutting relationship to each other to form a cavity with excess adhesive between depending flange and said upwardly extending flange being received in said trough, and placing said top and bottom parts in a fixture to hold said top and bottom parts relative to each other while the foam resin expands and the adhesive cures.
Claim 3
Dependent Claim
70 words
The method of forming a ski set forth in claim 1 and further comprising forming said bottom part with said trough adjacent the inner surface of the upwardly extending flange and applying the coating of adhesive to the inner surface of said upwardly extending flange in sufficient quantity for excess adhesive to flow into said trough and to be trapped thereby for bonding with the bottom of said depending flange.
Claim 4
Dependent Claim
51 words
The method of claim 1 wherein an opening is formed at the rear end of one of said ski parts and wherein said top and bottom parts and said fixture are tilted as a unit to elevate said opening to permit the escape of gases during curing of said foam resin.
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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |