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US4708671A
Expired / Lapsed
US
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Watercraft with thrust-reversing device
Assignee: Kawasaki Motors Ltd
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Filing: 1986-05-28
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Granted: 1987-11-24
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Expires: 2006-05-28
Abstract
Abstract This disclosure relates to a small craft equipped with a water jet propulsion system and a thrust-reversing device. The thrust-reversing device is supported for movement up and down between an operating position located directly to the rear of the exhaust port of the jet propulsion system and a retracted position located upwardly from the operating position. The thrust-reversing device includes a U-shaped water guide passage which extends laterally; the left and right ends of the water guide passage are shaped into concave ends which curve forwardly; and the bottom of the hull of the craft includes channels aligned with the curved ends of the water guide passage of the thrust-reversing device when the device is at the operating position.
Inventors
- 👤 Katumi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:08
CPC Classifications
B; B63; B63H; B63H11/00; B63H11/02; B63H11/10; B63H11/107; B63H11/11; B63B; B63B34/00; B63B34/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
A small water craft comprising a hull, a propulsion system on said hull including a nozzle and means for ejecting a jet of water out of said nozzle, a thrust-reversing device pivotably mounted on said hull adjacent said nozzle and movable between an operating position and a retracted position, said device forming a generally U-shaped passage extending substantially laterally of said hull and said passage having concave ends which curve laterally and forwardly, said device when in said operating position being positioned in the path of said jet and directing said jet laterally and forwardly in said passage way, said hull having channels therein generally aligned with said concave ends and conducting said jet generally forwardly when said device is in said operating position, said device when in said retracted position being displaced upwardly out of the path of said jet, said device when in said operating position being no lower than said hull, said hull having a longitudinal centerline, said nozzle and said device being substantially on said centerline, and said channels being symmetrically positioned on opposite sides of said centerline.
Claim 2
Dependent Claim
182 words
A small water craft comprising a hull, a propulsion system on said hull including a nozzle and means for ejecting a jet of water out of said nozzle, a thrust-reversing device pivotably mounted on said hull adjacent said nozzle and movable between an operating position and a retracted position, said device forming a generally U-shaped passage extending substantially laterally of said hull and said passage having concave ends which curve laterally and forwardly, said device when in said operating position being positioned in the path of said jet and directing said jet laterally and forwardly in said passage way, said hull having channels therein generally aligned with said concave ends and conducting said jet generally forwardly when said device is in said operating position, said device when in said retracted position being displaced upwardly out of the path of said jet, said device when in said operating position being no lower than said hull, said hull having a longitudinal centerline, said nozzle and said device being substantially on said centerline, and said channels being symmetrically positioned on opposite sides of said centerline.
Claim 3
Dependent Claim
18 words
A craft as set forth in claim 1, wherein said channels extend laterally and forwardly from said device.
Claim 4
Dependent Claim
18 words
A craft as set forth in claim 1, wherein said channels extend downwardly and forwardly from said device.
Claim 5
Dependent Claim
29 words
A craft as set forth in claim 3, wherein said hull has a bottom wall, and said channels make an angle of approximately 45° relative to said bottom wall.
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) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |