In-trimming hydraulic circuit

Details In-trimming hydraulic circuit In-trimming hydraulic circuit

1990-02-06

1991-07-09

Basinger, Sherman

Marine propulsion

Screw propeller

With means effecting or facilitating movement of propulsion...

114150, B63H 512

Patent

active

050301470

ABSTRACT:
Disclosed herein is a hydraulic circuit for a marine propulsion device, which circuit comprises a sump for hydraulic fluid, a reversible hydraulic pump, a first fluid conduit communicating between the sump and the pump and including a one way check valve permitting flow to the pump from the sump and preventing flow to the sump from the pump, a second fluid conduit communicating between the sump and the pump and including a one way check valve permitting flow to the pump from the sump and preventing flow to the sump from the pump, and a mechanism for opening one of the check valves in response to closure of the other of the check valves.

REFERENCES:
patent: 698483 (1902-04-01), Faith et al.
patent: 4064824 (1977-12-01), Hall
patent: 4096820 (1978-06-01), Hall
patent: 4687449 (1987-08-01), Fenrich
patent: 4702714 (1987-10-01), Nakase
patent: 4781631 (1988-11-01), Uchida et al.

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