US3776168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed boat hull
Assignee: Belmont Boats Inc
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Filing: 1972-06-09
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Granted: 1973-12-04
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Expires: 1992-06-09
Abstract
Abstract A high-speed boat hull for preferred use with a hydrojet engine having a plurality of substantially parallel strakes on the surface of the hull commencing from aft of the bow and all but the two center-most strakes running to the stern, the cross section of the strakes presenting a series of inwardly sloping steps to raise the hull in the water, direct the water flow inward toward the center of the hull, and assist in turning the hull when operating at high speeds.
Inventors
- 👤 S Weeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:13
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
A high-speed boat hull with a bow and a transom and with a centerline running from the bow to the middle of the transom, said hull comprising: a forward portion with a smooth surface approximately one third the length of the hull and an aft portion having a plurality of substantially parallel strakes said strakes having a first vertical face and a second inwardly incline face to raise the hull in the water to assist in turning the hull when operating at high speeds and to direct portions of the relative flow of water inward toward the center of the hull; said hull including a hydrojet intake located in the aft portion of the hull, forward of said transom on the centerline of said hull.
Claim 2
Dependent Claim
125 words
A high-speed boat hull with a bow and a transom and with a centerline running from the bow to the middle of the transom, said hull comprising: a forward portion with a smooth surface approximately one third the length of the hull and an aft portion having a plurality of substantially parallel strakes said strakes having a first vertical face and a second inwardly incline face to raise the hull in the water to assist in turning the hull when operating at high speeds and to direct portions of the relative flow of water inward toward the center of the hull; said hull including a hydrojet intake located in the aft portion of the hull, forward of said transom on the centerline of said hull.
Claim 3
Dependent Claim
24 words
The hull of claim 1 Wherein said smooth surface is greater than one quarter but less than one half the length of the hull.
Claim 4
Dependent Claim
33 words
The hull of claim 1 wherein said strakes include two center strakes arranged on said aft portion of the hull on each side of the centerline and terminating forward of said hydrojet intake.
Claim 5
Dependent Claim
29 words
The hull of claim 3 wherein the strakes other than the two center strakes run the length of the aft portion of the hull and terminate at the transom.
Claim 6
Dependent Claim
18 words
The boat hull of claim 4 wherein said incline face has an angle from the horizontal exceeding 5*.
Claim 7
Dependent Claim
16 words
The boat hull of claim 4 wherein said incline face has a width exceeding 3 inches.
Claim 8
Dependent Claim
19 words
The boat hull of claim 4 wherein said strakes have a tapered lead end and a rounded trailing end.
Claim 9
Dependent Claim
20 words
The boat hull of claim 4 in combination with a hydrojet power unit for propelling said hull at high speeds.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |