Hydraulic trim tile system for outboard propulsion units using a

Details Hydraulic trim tile system for outboard propulsion units using a Hydraulic trim tile system for outboard propulsion units using a

1981-08-17

1984-07-03

Basinger, Sherman D.

Marine propulsion

Screw propeller

With means effecting or facilitating movement of propulsion...

60560564, B63H 2126

Patent

active

044577257

ABSTRACT:
A hydraulic system for trimming a marine outboard drive, and wherein a single actuator for moving the propulsion unit is used for both trim and tilt. The actuator is connected to a hydraulic pump. A pump pressure amplifier is connected to the actuator. The amplifier has first and second ports connecting the actuator and to the hydraulic pump. The amplifier includes a switch for bypassing the amplifier to pass the hydraulic fluid from the pump to the actuator without amplification. The switch is operable for bypassing the amplifier for rapidly tilting the propulsion unit and operable for connecting the amplifier within the hydraulic circuit to develop increased pressure for trimming the propulsion unit. The hydraulic amplifier includes a piston movable within a cylinder. Movement of the hydraulic amplifier piston to one end of the hydraulic amplifier, cylinder actuates the switch to bypass the amplifier and movement in the other direction away from that end, switches and amplifier to its amplification mode, the amplifier continuing in its amplification mode until the amplifier piston reaches a limit switch placed in its path to bypass the amplifier hydraulic circuit.

REFERENCES:
patent: 1970999 (1934-08-01), Ferris et al.
patent: 3473328 (1969-10-01), Mayhew
patent: 3581702 (1971-06-01), Moberg
patent: 3659420 (1972-05-01), Reinecke
patent: 3832851 (1974-09-01), Kiernan
patent: 3842789 (1974-10-01), Bergstedt
patent: 3915111 (1975-10-01), Buddrus
patent: 3999502 (1976-12-01), Mayer

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