Marine propulsion – Screw propeller – With means effecting or facilitating movement of propulsion...
Patent
1997-12-29
2000-03-28
Avila, Stephen
Marine propulsion
Screw propeller
With means effecting or facilitating movement of propulsion...
B63H 5125
Patent
active
060424346
ABSTRACT:
An improved hydraulic circuit for a tilt and trim adjustment system allows an associated marine drive to be trimmed up into a tilt range for running in shallow water. The circuit includes a tilt relief valve. The valve differentiates between the hydraulic pressures within the system caused by various running conditions, and opens the valve only when two conditions are met: (i) the associated pump is activated and (ii) high pressure exists at the valve's inlet side, which usually occurs when running at high speeds. The valve, however, remains closed at slower speeds. The marine drive thus can be raised up and operated within the tilt range, provided that the speed is slow enough.
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Avila Stephen
Sanshin Kogyo Kabushiki Kaisha
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