US3760439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat and method of forming same
Assignee: Great Lakes Sports Mfg Co
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Filing: 1971-08-31
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Granted: 1973-09-25
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Expires: 1991-08-31
Abstract
Abstract The specification and drawings disclose a load bearing structure and method for forming the same. In particular, the drawings show a catamaran-type sailboat including a pair of hulls having thin aluminum outer skin. The rigging, sails and deck are supported from rigid frame or load distributing members positioned within the hulls and spaced from their outer skin. Plastic is foamed in place in the hulls and encloses the frame members. The plastic foam bonds the frame to the skin of the hulls and serves as the primary media for transmitting the reaction loads from the deck and sails.
Inventors
- 👤 P Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:13
CPC Classifications
B; B63; B63B; B63B5/00; B63B5/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
191 words
A boat comprising: at least one elongated, hollow hull formed with relatively thin sheet metal walls; at least one elongated, rigid structural frame member positioned within said hull and extending generally longitudinally thereof, said structural frame member having substantial lognitudinal and lateral extent and at all points spaced from the walls of said hull; at least one deck support member rigidly connected to said structural frame member and extending laterally outwardly through an opening formed in the walls of said hull; a deck connected to and supported by said deck support member at a location exteriorly of said hull; foam plastic material enclosing said structural frame member and extending between said structural frame member and the walls of said hull, and substantially filling said hull and constituting the sole media for effectively transmitting forces between said hull and said structural frame member; and, the periphery of the opening in said hull through which said deck support mEmber passes being spaced from said deck support member with no rigid mechanical connections therebetween, whereby movements of said deck support member relative to said hull will not result in localized flexure of said hull.
Claim 2
Dependent Claim
191 words
A boat comprising: at least one elongated, hollow hull formed with relatively thin sheet metal walls; at least one elongated, rigid structural frame member positioned within said hull and extending generally longitudinally thereof, said structural frame member having substantial lognitudinal and lateral extent and at all points spaced from the walls of said hull; at least one deck support member rigidly connected to said structural frame member and extending laterally outwardly through an opening formed in the walls of said hull; a deck connected to and supported by said deck support member at a location exteriorly of said hull; foam plastic material enclosing said structural frame member and extending between said structural frame member and the walls of said hull, and substantially filling said hull and constituting the sole media for effectively transmitting forces between said hull and said structural frame member; and, the periphery of the opening in said hull through which said deck support mEmber passes being spaced from said deck support member with no rigid mechanical connections therebetween, whereby movements of said deck support member relative to said hull will not result in localized flexure of said hull.
Claim 3
Dependent Claim
21 words
The boat as defined in claim 1 including at least two of said deck supporting frame members extending into said hull.
Claim 4
Dependent Claim
23 words
The boat as defined in claim 2 wherein each of said deck supporting frame members are rigidly connected to said structural frame member.
Claim 5
Dependent Claim
34 words
The boat as defined in claim 1 including a transom member which forms a portion of the hull and a relatively rigid structural member connected to said transom and extending into said foam plastic.
Claim 6
Dependent Claim
15 words
The boat as defined in claim 1 wherein said hull is formed from sheet aluminum.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |