Hydraulic trim-tilt system

Details Hydraulic trim-tilt system Hydraulic trim-tilt system

1982-12-20

1984-12-25

Blix, Trygve M.

Marine propulsion

Screw propeller

With means effecting or facilitating movement of propulsion...

440 53, 91401, 91420, F15B 1522

Patent

active

044901208

ABSTRACT:
A hydraulic system for trimming and tilting an outboard propulsion unit (10) includes both trim piston-cylinder units (22, 23) and a trim-tilt piston-cylinder unit (17). The flow of hydraulic fluid from the reversible pump (49) is controlled by a spool valve (26). A pressure relief valve (71) is mounted in the spool (50) to maintain pressure on one side of the spool (50) when the pump (49) is turned off to rapidly close the return valve (56) and prevent further movement of the piston-cylinder units.

REFERENCES:
patent: 2630830 (1953-03-01), Meddock
patent: 3799104 (1974-03-01), Kurling
patent: 3842789 (1974-10-01), Bergstedt
patent: 3885517 (1975-05-01), Borst
patent: 4052952 (1977-10-01), Hale
patent: 4096820 (1978-06-01), Hall
patent: 4391592 (1983-07-01), Hundertmark

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