Power plants – Pressure fluid source and motor – Condition responsive control of motive fluid flow
Patent
1994-07-13
1995-08-29
Michalsky, Gerald A.
Power plants
Pressure fluid source and motor
Condition responsive control of motive fluid flow
60476, 137106, 440 61, F15B 700
Patent
active
054449790
ABSTRACT:
A tilt cylinder for tilting an outboard engine has first and second cylinder chambers. A pair of on/off valves is movably disposed in respective fluid passages connected to a hydraulic pump and the first and second cylinder chambers, respectively. The on/off valves are operatively combined with respective shuttle valves which have respective oil passages in facing relationship to the on/off valves, respectively, and respective ball valve bodies for selectively opening the oil passage into communication with each other. When the hydraulic pump is actuated to develop a working oil pressure buildup, one of the on/off valves is opened by the working oil pressure buildup to establish an oil supply passage from the hydraulic pump to one of the first and second chambers, and the other of the on/off valves is opened by the coacting shuttle valve which is moved by the working oil pressure buildup to establish an oil return passage from the other of the first and second chambers to the hydraulic pump. The shuttle valves have respective auxiliary passages communicating with the oil passages, respectively, and the oil supply and return passages, respectively.
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Funami Yasuo
Takayanagi Hisao
Toyoshima Omito
Michalsky Gerald A.
Rose Howard L.
Showa Corporation
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