US3840926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat hull
Assignee: Individual
•
Filing: 1973-01-12
•
Granted: 1974-10-15
•
Expires: 1993-01-12
Abstract
Abstract A boat body or hull, especially suitable for racing type sailboats, has a thin outer plastic shell, a plastic inner or false bottom in the shell and secured around its periphery to the shell and a plastic deck covering the shell composed of spaced top and bottom layers. The spaces between the shell and inner bottom and between the top and bottom layers of the deck are filled with a hard foam plastic material itimately bonded by fibrous laminations to the walls defining the spaces with fibers of the laminations embedded in the foam.
Inventors
- 👤 H Stoeberl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
B; B63; B63B; B63B5/00; B63B5/24; B63B73/00; B63B73/70; B63B73/72; B63B73/74
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
125 words
A plastic boat body which comprises a molded plastic boat shell, an inner bottom shell in said boat shell and secured around its periphery to the boat shell, said boat shell and inner bottom shell providing a chamber therebetween, an insitu cast hard foam plastic core filling said chamber in full conformity therewith, fiber lamination sheets integrally bonded to and covering the faces of the boat shell and inner bottom defining said chamber, plastic from the boat shell and inner bottom shell being embedded in interstices of said fiber lamination sheets, and fibers of said laminations sheet surrounded by the cast foam plastic core and embedded therein in locked relation therewith to integrally bond the foam plastic core to the boat shell and inner bottom.
Claim 2
Dependent Claim
125 words
A plastic boat body which comprises a molded plastic boat shell, an inner bottom shell in said boat shell and secured around its periphery to the boat shell, said boat shell and inner bottom shell providing a chamber therebetween, an insitu cast hard foam plastic core filling said chamber in full conformity therewith, fiber lamination sheets integrally bonded to and covering the faces of the boat shell and inner bottom defining said chamber, plastic from the boat shell and inner bottom shell being embedded in interstices of said fiber lamination sheets, and fibers of said laminations sheet surrounded by the cast foam plastic core and embedded therein in locked relation therewith to integrally bond the foam plastic core to the boat shell and inner bottom.
Claim 3
Dependent Claim
47 words
The boat body of claim 1 including a deck covering the shell composed of spaced top and bottom molded plastic sheets, hard plastic foam filling the space between said sheets in full conformity therewith and laminations bonded to the sheets having fibers embedded in the plastic foam.
Claim 4
Dependent Claim
38 words
The boat body of claim 1 wherein the shell is saucer-shaped with rounded sides extending above the inner bottom, and the inner bottom has a flat bottom portion parallel to and above the water line of the boat.
Claim 5
Dependent Claim
25 words
The boat body of claim 2 wherein the sides of the shell extend to the deck and the deck is spaced above the inner bottom.
Claim 6
Dependent Claim
31 words
The boat body of claim 1 including multi-layer lamination inserts surrounding the foam with the fibers of the laminations embedded in the foam and cemented to the inner bottom and shell.
Claim 7
Dependent Claim
22 words
The boat body of claim 2 wherein the fiberous material is a woven lamination having threads extending therefrom into the plastic foam.
Claim 8
Dependent Claim
26 words
The boat body of claim 1 wherein the shell has a keel box recess in the bottom thereof receiving therein the upper end of a keel.
Claim 9
Dependent Claim
23 words
The boat body of claim 1 including additional fibrous lamination layers positioned at points of stress of the shell to reinforce the construction.
Claim 10
Dependent Claim
21 words
The boat body of claim 2 including a rudder post tube anchored in the deck, the inner bottom and the shell.
Claim 11
Dependent Claim
22 words
The boat body of claim 1 including a deck overlying the shell and secured around the periphery thereto through a water-tight joint.
Claim 12
Dependent Claim
24 words
The boat body of claim 1 including a mast foot extending transversely across the inner bottom and secured at its ends to the shell.
Claim 13
Dependent Claim
46 words
The boat body of claim 1 wherein plastic from the boat shell and inner bottom shell is pulled into interstices of the fiber lamination sheets and interlock the sheeets with the shells and the sheets have threads extending therefrom which are embedded into the hard foam.
Claim 14
Dependent Claim
37 words
The boat body of claim 12 wherein at least one of the fiber lamination sheets has an underlying fibrous layer and threads of the underlying layer in the form of loops are pulled into the overlying layer.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |