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US3795105A
Expired / Lapsed
US
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Control apparatus for hydraulic jet propulsion water borne craft
Assignee: Twin Disc Inc
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Filing: 1972-05-02
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Granted: 1974-03-05
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Expires: 1992-05-02
Abstract
Abstract Control apparatus for a hydraulic jet propulsion water borne craft of the type having a variable area nozzle, thrust reversing means for the nozzle, steering valves, and a power plant such as an internal combustion engine for driving the water pump means that creates the water pressure. The apparatus includes a single operators lever which controls the engine speed and also includes programming means, also controlled by the lever, which controls the area of the nozzle in relationship to the engine speed.
Inventors
- 👤 G Aschauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:58
CPC Classifications
B; B63; B63H; B63H11/00; B63H11/02; B63H11/10; B63H11/107; B63H11/11; B63H11/113; B63H21/00; B63H21/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
In a hydraulic jet propulsion water craft having a power plant for driving water pump means, a variable area nozzle for receiving water under pressure from said pump means and for discharging said water rearwardly as a jet to drive said craft, nozzle actuating means for varying the area of said nozzle, craft reversing means shiftable into and out of receiving relationship with the jet discharged by said nozzle for determining the direction of movement of said craft, means for shifting said reversing means, and control apparatus including a single control lever having a connection with said means for shifting said reversing means and shiftable to a craft forward position or a craft rearward position in its initial movement from a neutral position, said lever also having a connection with said power plant for regulating the speed thereof and which increases engine speed immediately upon continued lever movement after said initial lever movement to said craft forward or craft reverse positions, said lever also having a programming operating connection with said nozzle actuaTing means for changing the area of said nozzle after said craft direction selection has been made by said lever and after said increase in engine speed has also been made by said single lever.
Claim 2
Dependent Claim
207 words
In a hydraulic jet propulsion water craft having a power plant for driving water pump means, a variable area nozzle for receiving water under pressure from said pump means and for discharging said water rearwardly as a jet to drive said craft, nozzle actuating means for varying the area of said nozzle, craft reversing means shiftable into and out of receiving relationship with the jet discharged by said nozzle for determining the direction of movement of said craft, means for shifting said reversing means, and control apparatus including a single control lever having a connection with said means for shifting said reversing means and shiftable to a craft forward position or a craft rearward position in its initial movement from a neutral position, said lever also having a connection with said power plant for regulating the speed thereof and which increases engine speed immediately upon continued lever movement after said initial lever movement to said craft forward or craft reverse positions, said lever also having a programming operating connection with said nozzle actuaTing means for changing the area of said nozzle after said craft direction selection has been made by said lever and after said increase in engine speed has also been made by said single lever.
Claim 3
Dependent Claim
72 words
The combination set forth in claim 1 further characterized in that said operating connection includes a cam and link means, a rotary servo-valve including an input shaft and a feedback shaft, said cam link means being connected to said input shaft and said feedback shaft being connected with said nozzle whereby said servo-valve directs fluid pressure to said nozzle actuating means and movement of said nozzle is fed back into said servo-valve.
Claim 4
Dependent Claim
39 words
The combination set forth in claim 1 further characterized in that said means for shifting said reversing means includes hydraulic cylinder means, and a hydraulic valve connected with said cylinder means and having a control connection with said lever.
Claim 5
Dependent Claim
38 words
The combination set forth in claim 1 further characterized in that said control connection is also connected between said control lever and said nozzle actuating means whereby said reversing means is actuated prior to said nozzle actuating means.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |