Patent US3747551A successfully refreshed from Google Patents.
US3747551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat hull and method of constucting the same
Assignee: IHC Holland NV
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Filing: 1971-04-26
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Granted: 1973-07-24
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Expires: 1991-04-26
Abstract
Abstract The construction of boat hulls from a plurality of plates is facilitated by welding spaced parallel reinforcing bars to one side of the plate, and then bending the plate only in the direction perpendicular to the bars. The plate is then braced in that bent position and assembled in the hull construction. In the completed hull, the reinforcing bars of one plate will be at an angle to the bars of other plates.
Inventors
- 👤 J Bennekers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:58
CPC Classifications
B; B63; B63B; B63B3/00; B63B3/14; B63B3/68; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49892
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
134 words
A method of constructing a boat hull comprising a skin formed of plates connected to each oTher and having reinforcing frame members and transverse stiffening members, comprising securing to the sheets while the sheets are in a flat condition a plurality of straight spaced parallel coplanar reinforcing members, thereafter bending the sheets by their own weight to a predetermined curvature in one direction only until said reinforcing members are no longer coplanar, said direction being perpendicular to said reinforcing members, securing transverse stiffening members of said curvature to the bent sheet to maintain said curvature, and then connecting the sheets together to form a boat hull with the sheets fairing into each other and the reinforcing members of one sheet being disposed at an obtuse angle to the reinforcing members of an adjacent sheet.
Claim 2
Independent Claim
134 words
A method of constructing a boat hull comprising a skin formed of plates connected to each oTher and having reinforcing frame members and transverse stiffening members, comprising securing to the sheets while the sheets are in a flat condition a plurality of straight spaced parallel coplanar reinforcing members, thereafter bending the sheets by their own weight to a predetermined curvature in one direction only until said reinforcing members are no longer coplanar, said direction being perpendicular to said reinforcing members, securing transverse stiffening members of said curvature to the bent sheet to maintain said curvature, and then connecting the sheets together to form a boat hull with the sheets fairing into each other and the reinforcing members of one sheet being disposed at an obtuse angle to the reinforcing members of an adjacent sheet.
Claim 3
Dependent Claim
19 words
A method as claimed in claim 1, and bending said sheets to said predetermined curvature on a pin bed.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |