US4462331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable bottom construction for inflatable boat
Assignee: UNITED STATES OF AMERICAN NAVY THE, Secretary of
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Filing: 1983-01-31
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Granted: 1984-07-31
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Expires: 2003-01-31
Abstract
Abstract An inflatable bottom structure in an inflatable boat avoids blisters in thexposed, heavy duty outer walls of superimposed upper and lower inflatable floors by a composite wall construction wherein an outer layer of synthetic rubber material, in which a heavy woven synthetic fiber fabric is embedded, and an inner synthetic rubber layer, disposed on a flexible tension strand holding scrim cloth layer, are fused and cured into a unitary wall.
Inventors
- 👤 William M. McCrory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:49
CPC Classifications
B; B63; B63B; B63B7/00; B63B7/06; B63B7/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
156 words
In an inflatable boat bottom structure of the type including a first inflatable floor element in superimposed relation on a second inflatable floor element, said floors each comprising upper and lower rubberized fabric walls interconnected by a multiplicity of drop-stitches as tension elements, the improvement comprising: each of said walls comprising an inner scrim layer carrying said drop-stitches; an inner synthetic rubber adhesive layer disposed on said scrim layer; an outer layer of woven strength fabric; an outer synthetic rubber layer in which said strength fabric is embedded; said outer and inner synthetic rubber layers being fused and cured into a single integral layer free of lamination interfaces; and said upper fabric wall of said first inflatable floor and said lower fabric wall of said second floor each being of greater thickness and having heavier strength fabrics than do the lower fabric wall of said first floor and the upper fabric wall of said second floor.
Claim 2
Dependent Claim
156 words
In an inflatable boat bottom structure of the type including a first inflatable floor element in superimposed relation on a second inflatable floor element, said floors each comprising upper and lower rubberized fabric walls interconnected by a multiplicity of drop-stitches as tension elements, the improvement comprising: each of said walls comprising an inner scrim layer carrying said drop-stitches; an inner synthetic rubber adhesive layer disposed on said scrim layer; an outer layer of woven strength fabric; an outer synthetic rubber layer in which said strength fabric is embedded; said outer and inner synthetic rubber layers being fused and cured into a single integral layer free of lamination interfaces; and said upper fabric wall of said first inflatable floor and said lower fabric wall of said second floor each being of greater thickness and having heavier strength fabrics than do the lower fabric wall of said first floor and the upper fabric wall of said second floor.
Claim 3
Dependent Claim
46 words
In an inflatable boat bottom structure as defined in claim 1, said first and second floors being bonded together in said superimposed relation by laterally spaced strips of adhesive disposed between the lower wall of the first floor and the upper wall of the second floor.
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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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |