Patent US5438946A successfully refreshed from Google Patents.
US5438946A
Expired / Lapsed
US
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Personal jet propelled watercraft
Assignee: Yamaha Motor Co Ltd
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Filing: 1993-04-28
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Granted: 1995-08-08
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Expires: 2013-04-28
Abstract
Abstract Several embodiments of personal watercraft being adapted to accommodate at least two riders seated in straddle, tandem fashion. The watercraft are powered by a combined jet propulsion unit and powering internal combustion engine which is positioned vertically above the jet propulsion unit and which is positioned at the extreme rear of the hull beneath a rear seat portion. The hull is wider at the rear than the front so as to provide added buoyancy and the center of gravity is disposed to the rear of the hull to improve turnability. This affords a large area for locating engine accessories and storage compartments as well as buoyant masses for the hull.
Inventors
- 👤 Noboru Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:55
CPC Classifications
B; B63; B63B; B63B34/00; B63B34/10
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
111 words
A jet propelled watercraft comprised of a hull defining a rider's area at the rear end thereof including a steering control for said watercraft, a seat extending rearwardly of said steering control and adapted to accommodate at least a pair of riders seated in straddle, tandem fashion, the front portion of said seat accommodating a rider operating said control with the rear portion of said seat accommodating a passenger, said seat terminating contiguous to the transom of said hull, and an internal combustion engine and jet propulsion unit positioned rearwardly of said front portion and beneath said rear portion of said seat and forwardly of said transom for propelling said hull.
Claim 2
Dependent Claim
111 words
A jet propelled watercraft comprised of a hull defining a rider's area at the rear end thereof including a steering control for said watercraft, a seat extending rearwardly of said steering control and adapted to accommodate at least a pair of riders seated in straddle, tandem fashion, the front portion of said seat accommodating a rider operating said control with the rear portion of said seat accommodating a passenger, said seat terminating contiguous to the transom of said hull, and an internal combustion engine and jet propulsion unit positioned rearwardly of said front portion and beneath said rear portion of said seat and forwardly of said transom for propelling said hull.
Claim 3
Dependent Claim
32 words
A jet propelled watercraft as set forth in claim 1 wherein the hull defines foot areas on opposite sides of the seat adapted to accommodate the feet of the riders seated thereon.
Claim 4
Dependent Claim
32 words
A jet propelled watercraft as set forth in claim 2 wherein the foot areas open through the rear of the transom so that water accumulating therein may drain rearwardly through the transom.
Claim 5
Dependent Claim
22 words
A jet propelled watercraft as set forth in claim 1 wherein the internal combustion engine is positioned above the jet propulsion unit.
Claim 6
Dependent Claim
28 words
A jet propelled watercraft as set forth in claim 4 wherein the rear portion at the seat is removable for access of the engine and jet propulsion unit.
Claim 7
Dependent Claim
33 words
A jet propelled watercraft as set forth in claim 5 wherein the hull is narrowest at its front and tapers out rearwardly to be widest adjacent the sides of the rear seat portion.
Claim 8
Dependent Claim
32 words
A jet propelled watercraft as set forth in claim 6 wherein the hull defines foot areas on opposite sides of the seat adapted to accommodate the feet of the riders seated thereon.
Claim 9
Dependent Claim
32 words
A jet propelled watercraft as set forth in claim 7 wherein the foot areas open through the rear of the transom so that water accumulating therein may drain rearwardly through the transom.
Claim 10
Dependent Claim
38 words
A jet propelled watercraft as set forth in claim 6 wherein the front seat portion is removable independently of the rear seat portion and further including an area beneath said front seat portion for providing a storage area.
Claim 11
Dependent Claim
20 words
A jet propelled watercraft as set forth in claim 9 wherein a battery is positioned beneath the front seat portion.
Claim 12
Dependent Claim
21 words
A jet propelled watercraft as set forth in claim 9 wherein a fuel tank is positioned beneath said front seat portion.
Claim 13
Dependent Claim
21 words
A jet propelled watercraft as set forth in claim 11 wherein a battery is further positioned beneath said front seat portion.
Claim 14
Dependent Claim
19 words
A jet propelled watercraft as set forth in claim 12 wherein the battery is positioned above the fuel tank.
Claim 15
Dependent Claim
33 words
A jet propelled watercraft as set forth in claim 11 wherein the fuel tank has a forwardly extending fill nozzle accessible on one side of the hull forwardly of the front seat portion.
Claim 16
Dependent Claim
26 words
A jet propelled watercraft as set forth in claim 9 further including a further storage area positioned forwardly of the seat and beneath a deck area.
Claim 17
Dependent Claim
22 words
A jet propelled watercraft as set forth in claim 15 wherein the further storage area is accessible through a removable hatch cover.
Claim 18
Dependent Claim
22 words
A jet propelled watercraft as set forth in claim 16 further including a buoyant mass positioned at the front of the hull.
Claim 19
Dependent Claim
38 words
A jet propelled watercraft as set forth in claim 1 wherein the front seat portion is removable independently of the rear seat portion and further including an area beneath said front seat portion for providing a storage area.
Claim 20
Dependent Claim
20 words
A jet propelled watercraft as set forth in claim 18 wherein a battery is positioned beneath the front seat portion.
Claim 21
Dependent Claim
21 words
A jet propelled watercraft as set forth in claim 18 wherein a fuel tank is positioned beneath said front seat portion.
Claim 22
Dependent Claim
21 words
A jet propelled watercraft as set forth in claim 20 wherein a battery is further positioned beneath said front seat portion.
Claim 23
Dependent Claim
19 words
A jet propelled watercraft as set forth in claim 21 wherein the battery is positioned above the fuel tank.
Claim 24
Dependent Claim
33 words
A jet propelled watercraft as set forth in claim 20 wherein the fuel tank has a forwardly extending fill nozzle accessible on one side of the hull forwardly of the front seat portion.
Claim 25
Dependent Claim
26 words
A jet propelled watercraft as set forth in claim 23 further including a further storage area positioned forwardly of the seat and beneath a deck area.
Claim 26
Dependent Claim
22 words
A jet propelled watercraft as set forth in claim 24 wherein the further storage area is accessible through a removable hatch cover.
Claim 27
Dependent Claim
22 words
A jet propelled watercraft as set forth in claim 25 further including a buoyant mass positioned at the front of the hull.
Claim 28
Dependent Claim
26 words
A jet propelled watercraft as set forth in claim 1 further including a further storage area positioned forwardly of the seat and beneath a deck area.
Claim 29
Dependent Claim
22 words
A jet propelled watercraft as set forth in claim 27 wherein the further storage area is accessible through a removable hatch cover.
Claim 30
Dependent Claim
22 words
A jet propelled watercraft as set forth in claim 28 further including a buoyant mass positioned at the front of the hull.
Claim 31
Dependent Claim
70 words
A jet propelled watercraft as set forth in claim 1 further including a boarding ladder pivotally supported on the transom of the hull and moveable between an elevated out-of-the water position nested within an upper portion of the transom and an lowered position wherein riders may board the watercraft through the rear of the hull from the body of water in which the watercraft is operating using the boarding ladder.
Claim 32
Dependent Claim
32 words
A jet propelled watercraft as set forth in claim 30 wherein the hull defines foot areas on opposite sides of the seat adapted to accommodate the feet of the riders seated thereon.
Claim 33
Dependent Claim
32 words
A jet propelled watercraft as set forth in claim 31 wherein the foot areas open through the rear of the transom so that water accumulating therein may drain rearwardly through the transom.
Claim 34
Dependent Claim
27 words
A jet propelled watercraft as set forth in claim 32 wherein the boarding ladder is disposed to the rear of the seat and between the foot areas.
References Cited (Backward Citations)
US3982497A
Cited
JPS6136088A
Cited
JPS61188294A
Cited
US4768983A
Cited
US4998966A
Cited
US5076190A
Cited
JPH02310191A
Cited
US4907673A
Cited
US5097789A
Cited
JPH03193587A
Cited
US5237950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-07 | 1999-02-06 | 1999-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-07 | 2003-02-06 | 2003-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-07 | 2007-02-06 | 2007-08-08 | $7700.00 | Window Closed / Lapsed |