Marine propulsion – Screw propeller – With means effecting or facilitating movement of propulsion...
Patent
1992-10-16
1994-12-13
Avila, Stephen P.
Marine propulsion
Screw propeller
With means effecting or facilitating movement of propulsion...
B63H 2126
Patent
active
053725280
ABSTRACT:
Tilt and trim cylinders have blind-end chambers connected through a main valve to a first port of a reversible pump. The rod-end chamber of the tilt cylinder is connected through the main valve to a second port of the reversible pump. The rod-end chamber of the trim cylinder is connected to an oil tank. The second port of the pump is connected to the oil tank, and the first port may be connected to either only the main valve or the oil tank through a suction-prevention valve, an orifice, or a pressure relief valve. When the pump is actuated with the tilt cylinder locked to keep an outboard engine in an tilted-up position, the trim cylinder is automatically contracted to withdraw its piston rod. Cavitation in an oil passage from the blind-end chamber of the trim cylinder to the pump is prevented when working oil is introduced from the oil tank to the pump through the orifice or the pressure relief valve.
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Kai Shigeru
Nakamura Tamotu
Avila Stephen P.
Kabushiki Kaisha Showa Seisakusho
Rose Howard L.
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