US3698343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat hull
Assignee: Individual
•
Filing: 1971-01-07
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Granted: 1972-10-17
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Expires: 1991-01-07
Abstract
Abstract The hull bottom is shaped to form a longitudinal air-water channel which in the stern portion of the hull is divided into two transversely spaced air-water passages open at the transom. A pair of trim tabs are horizontally pivoted on the transom in such position that streams of air-water from the passages flow over as well as under the trim tabs.
Inventors
- 👤 Martin W Boome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:36
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/18; B63B39/00; B63B39/06; B63B39/061
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
137 words
The combination of a boat hull having a bow portion and a stern portion and including a bottom and a transom, said bottom being shaped to provide in the stern portion a pair of transversely spaced longitudinal passages which are open at the transom and extend forwardly to open at the bow so that when the hull moves through water, a mixture of water and air flows rearwardly through said passages, and a pair of transversely spaced trim tabs pivoted to said transom in longitudinal alignment with and rearwardly of the respective passages, said trim tabs having a horizontal pivot axis disposed in a plane which intersects said passages in downwardly spaced relation from the roof of the passages so that the air-water mixture flowing through the passages flows over as well as under the trim tabs.
Claim 2
Dependent Claim
137 words
The combination of a boat hull having a bow portion and a stern portion and including a bottom and a transom, said bottom being shaped to provide in the stern portion a pair of transversely spaced longitudinal passages which are open at the transom and extend forwardly to open at the bow so that when the hull moves through water, a mixture of water and air flows rearwardly through said passages, and a pair of transversely spaced trim tabs pivoted to said transom in longitudinal alignment with and rearwardly of the respective passages, said trim tabs having a horizontal pivot axis disposed in a plane which intersects said passages in downwardly spaced relation from the roof of the passages so that the air-water mixture flowing through the passages flows over as well as under the trim tabs.
Claim 3
Dependent Claim
49 words
The combination as set forth in claim 1 wherein said hull bottom includes a pair of longitudinal skid members extending along the outside of the respective air-water passages, said passages being transversely spaced from each other at the inside thereof by a depressed center portion of the hull bottom.
Claim 4
Dependent Claim
43 words
The combination as set forth in claim 2, together with horizontal pivot means mounting said trim tabs on said transom, said pivot means being located at the transom end of said skid members and of said depressed center portion of the hull bottom.
Claim 5
Dependent Claim
53 words
The combination as set forth in claim 2, wherein said skid members also extend forwardly along the hull bottom and define between their forward portions a longitudinal air-water channel which in the stern region of the hull is separated into said transversely spaced passages by said depressed center portion of the hull bottom.
Claim 6
Dependent Claim
23 words
The combination as set forth in claim 1 together with means for raising and lowering said trim tabs about their horizontal pivot axis.
Claim 7
Dependent Claim
30 words
The combination as set forth in claim 1, together with a propeller at the stern of said hull, said propeller being disposed centrally in the space between said air-water passages.
Claim 8
Dependent Claim
127 words
The combination of a boat hull having a bow portion and a stern portion and including a bottom and a transom, said bottom being shaped to provide a central longitudinal passage which is open at the transom and extends forwardly to open at the bow so that when the hull moves through the water, a mixture of water and air flows rearwardly through said passage, and a transverse trim tab pivoted to said transom in longitudinal alignment with and rearwardly of said passage, said trim tab having a horizontal pivot axis disposed in a plane which intersects said passage in downwardly spaced relation from the roof of the passage so that the air-water mixture flowing through the passage flows over as well as under the trim tab.
Claim 9
Dependent Claim
127 words
The combination of a boat hull having a bow portion and a stern portion and including a bottom and a transom, said bottom being shaped to provide a central longitudinal passage which is open at the transom and extends forwardly to open at the bow so that when the hull moves through the water, a mixture of water and air flows rearwardly through said passage, and a transverse trim tab pivoted to said transom in longitudinal alignment with and rearwardly of said passage, said trim tab having a horizontal pivot axis disposed in a plane which intersects said passage in downwardly spaced relation from the roof of the passage so that the air-water mixture flowing through the passage flows over as well as under the trim tab.
Claim 10
Dependent Claim
32 words
The combination as set forth in claim 7, together with a pair of propellers at the stern of said hull, said propellers being spaced transversely to opposite sides of said central passage.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |