Hydraulic control valve with regeneration function

Details Hydraulic control valve with regeneration function Hydraulic control valve with regeneration function

2008-03-04

2008-03-04

Rivell, John (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C137S625660

Reexamination Certificate

active

07337807

ABSTRACT:
The present invention A hydraulic control valve with a regeneration function, including a main body formed of a supply fluid passage to which pressurized fluid is supplied, at least one port, a tank fluid passage for discharging the pressurized fluid to an outside storage tank, and a first regeneration fluid passage; a spool movably installed inside the main body for controlling the flow of the pressurize fluid, and including a second generation fluid passage formed therein; and a regeneration valve for returning only part of the pressurized fluid of the first regeneration fluid passage to the tank fluid passage to maintain pressure of the first regeneration fluid passage at a designated value, and for supplying the pressurized fluid to the second regeneration fluid passage, and if the pressure of the supply fluid passage is higher than a predetermined pressure, changing the pressure of the first regeneration fluid passage in accordance with a change of the pressure of the supply fluid passage.

REFERENCES:
patent: 4397221 (1983-08-01), Friesen et al.
patent: 4642019 (1987-02-01), Sutton
patent: 4723476 (1988-02-01), Stucky
patent: 5615705 (1997-04-01), Cho
patent: 5791226 (1998-08-01), Chung et al.
patent: 5813310 (1998-09-01), Hori et al.
patent: 5862831 (1999-01-01), Chung et al.
patent: 7131368 (2006-11-01), Jeon

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