US3604384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boats
Assignee: Individual
•
Filing: 1969-02-24
•
Granted: 1971-09-14
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Expires: 1989-02-24
Abstract
Abstract The present invention relates to a boat including a hull having an inboard tunnel and foils with dihedral surfaces coacting with the tunnel at both the bow and stern.
Inventors
- 👤 Charles F Coles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:17
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/06; B63B39/061; B63B1/00; B63B1/16; B63B1/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
A boat adapted to be propeller driven comprising a hull formed with a tunnel, a first pair of dihedral foils mounted on the hull at the entrance to the tunnel and a second pair of foils at the stern, the stern-mounted foils having a common base and being joined in a shallow semicircular trough generally concentric with the axis of the propeller.
Claim 2
Dependent Claim
62 words
A boat adapted to be propeller driven comprising a hull formed with a tunnel, a first pair of dihedral foils mounted on the hull at the entrance to the tunnel and a second pair of foils at the stern, the stern-mounted foils having a common base and being joined in a shallow semicircular trough generally concentric with the axis of the propeller.
Claim 3
Dependent Claim
39 words
A boat according to claim 1 further characterized in that the hull includes two pontoons defining the tunnel and that the foils at the entrance to the tunnel are also mounted on a common base secured to the pontoons.
Claim 4
Dependent Claim
51 words
A boat comprising a hull formed with a tunnel adapted to conduct water while the boat is under way, the tunnel being defined by a pair of pontoons interconnected by a generally horizontal lift surface and dihedral foils mounted one on each of the pontoons at the entrance of the tunnel.
Claim 5
Dependent Claim
51 words
A boat comprising a hull formed with a tunnel adapted to conduct water while the boat is under way, the tunnel being defined by a pair of pontoons interconnected by a generally horizontal lift surface and dihedral foils mounted one on each of the pontoons at the entrance of the tunnel.
References Cited (Backward Citations)
DE764151C
Cited
US3294052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |