Control system for the suction line relief valve of a hydraulic

Details Control system for the suction line relief valve of a hydraulic Control system for the suction line relief valve of a hydraulic

1994-08-23

1996-02-20

Reese, Randolph A.

Excavating

Beneath a body of water

With means to control dredger operation in response to...

37317, 406 14, E02F 316, E02F 324

Patent

active

054919134

ABSTRACT:
A control system for the suction line relief valve of a hydraulic dredge is disclosed. The system includes a relief valve actuator which is hydraulically operated; a hydraulic pump powered by a motor; a directional valve; an energy storage device; and hydraulic lines connecting the hydraulic pump, the accumulator, and the relief valve actuator. The accumulator converts the hydraulic pressure in the hydraulic lines into potential energy which is used to generate hydraulic pressure if the pump fails or loses power. The pressure generated is enough for the operator to move the relief valve actuator which will reposition the relief valve to a desired position after pump failure.

REFERENCES:
patent: 2572263 (1951-10-01), Hofer
patent: 2603234 (1952-07-01), Hofer
patent: 2644400 (1953-07-01), Hofer
patent: 2889779 (1959-06-01), Hofer
patent: 2938536 (1960-05-01), Ehrenberg
patent: 4842244 (1989-06-01), Panchison, Jr.
patent: 5172497 (1992-12-01), Lemonds et al.

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