US4893579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact planing type boat
Assignee: Yamaha Motor Co Ltd
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Filing: 1988-08-26
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Granted: 1990-01-16
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Expires: 2008-08-26
Abstract
Abstract A hull configuration for a small watercraft that provides a tandem straddle type seating arrangement to the rear of a bridge on which the steering handle is formed. In addition, a forward seat is also provided and the hull is configured so that the buoyancy increases if a rider shifts to the forward seat so as to maintain a generally horizontal stability for the watercraft under all conditions.
Inventors
- 👤 Noboru Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:51
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/02; B63B1/04; B63B1/16; B63B1/18; B63B34/00; B63B34/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
192 words
A hull configuration for a watercraft having a bow portion, an intermediate bridge portion, supporting means for steering said watercraft, and a stern portion, a rear seat for seating at least two riders in said stern portion in straddle, tandem relationship to the rear of said bridge portion so that the forwardmost rider may steer said watercraft, and a forward seat for one of said riders in said bow portion forwardly of said bridge portion, a depressed foot area around a front portion and side portions of said forward seat and side portions of the rear seat and said bridge portion for placement of the riders feet, the unladen center of gravity of said hull being juxtaposed in a longitudinal direction in proximity to said bridge, said hull being configured such that said hull assumes a generally upwardly inclined position when riders are seated in tandem on said rear seat and said hull is travelling forwardly at speed and in a substantially horizontal condition when said watercraft is not travelling and riders of approximately equal weight are seated respectively on said forward and rear seats at approximately equal distances from said bridge.
Claim 2
Dependent Claim
192 words
A hull configuration for a watercraft having a bow portion, an intermediate bridge portion, supporting means for steering said watercraft, and a stern portion, a rear seat for seating at least two riders in said stern portion in straddle, tandem relationship to the rear of said bridge portion so that the forwardmost rider may steer said watercraft, and a forward seat for one of said riders in said bow portion forwardly of said bridge portion, a depressed foot area around a front portion and side portions of said forward seat and side portions of the rear seat and said bridge portion for placement of the riders feet, the unladen center of gravity of said hull being juxtaposed in a longitudinal direction in proximity to said bridge, said hull being configured such that said hull assumes a generally upwardly inclined position when riders are seated in tandem on said rear seat and said hull is travelling forwardly at speed and in a substantially horizontal condition when said watercraft is not travelling and riders of approximately equal weight are seated respectively on said forward and rear seats at approximately equal distances from said bridge.
Claim 3
Dependent Claim
40 words
A hull configuration for a watercraft as set forth in claim 1 wherein the forward portion of the hull shape is configured to provide substantially increasing buoyancy as the forward portion of the hull is urged to a submerged position.
Claim 4
Dependent Claim
60 words
A hull configuration for a watercraft as set forth in claim 2 wherein the hull is formed with a pair of longitudinally extending stripes that extend parallel to the longitudinal center line of the watercraft on opposite sides thereof from the stern forwardly of the bridge portion and wherein they curve inwardly toward the center line as approaching the bow.
Claim 5
Dependent Claim
36 words
A hull configuration for a watercraft as set forth in claim 3 wherein the outer portion of the hull is provided with a pair of chines that have a configuration generally paralleling that of the stripes.
Claim 6
Dependent Claim
26 words
A hull configuration for a watercraft as set forth in claim 4 wherein the forward portion of the hull has a generally shallow V shaped configuration.
Claim 7
Dependent Claim
40 words
A hull configuration for a watercraft as set forth in claim 1 wherein the watercraft is powered by an engine disposed beneath the bridge portion so as to concentrate the center of gravity in the area of the bridge portion.
Claim 8
Dependent Claim
24 words
A hull configuration for a watercraft as set forth in claim 6 further including buoyant mass means formed at the sides of the hull.
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) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |