Tilting/trimming system for marine propulsion unit

Details Tilting/trimming system for marine propulsion unit Tilting/trimming system for marine propulsion unit

1989-08-03

1991-05-28

Barefoot, Galen

Marine propulsion

Screw propeller

With means effecting or facilitating movement of propulsion...

91445, B63H 512

Patent

active

050189948

ABSTRACT:
A manually or magnetically operated selector valve for controlling the flow of hydraulic fluid through a hydraulic tilt and trim system of a marine outboard drive unit to achieve quick tilting up of the drive unit and slow trimming movement of the drive unit between a plurality of trim positions.
The hydraulic system includes at least one fluid motor interposed between the marine vessel and the drive unit for adjusting hte tilt and trim of the drive unit. A reversible fluid pump and reversible electric motor are used to power the fluid motor. In the slow trimming mode, the pump delivers fluid to only one fluid chamber of the fluid motor while the fluid in the other chamber is discharged back to the pump. In the quick tilt up mode, fluid is delivered to both fluid chambers of at least one fluid motor simultaneously.

REFERENCES:
patent: 3008445 (1961-11-01), Frank
patent: 3722455 (1973-03-01), Carpenter
patent: 3788401 (1974-01-01), Scheidt
patent: 3842789 (1974-10-01), Bergstedt
patent: 3999502 (1976-12-01), Mayer
patent: 4909766 (1990-03-01), Taguchi

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