Variable regeneration valve of heavy equipment

Details Variable regeneration valve of heavy equipment Variable regeneration valve of heavy equipment

2006-11-07

2006-11-07

Lazo, Thomas E. (Department: 3745)

Motors: expansible chamber type

With motive fluid valve

Inlet fluid supplemented by controlled fluid pressurized in...

C137S596200

Reexamination Certificate

active

07131368

ABSTRACT:
Disclosed is a variable regeneration valve of a heavy equipment in which hunting due to repeated motion of a spool does not occur in a regeneration valve that supplies a return flow of an actuator to a supply port during single operation of the actuator or its composite operation such as composite driving of arm in and swing, and a structure of the variable regeneration valve is simplified to improve process characteristics. The variable regeneration valve includes a hydraulic pump, an actuator connected with the hydraulic pump, a control valve controlling operation, stop, and direction of the actuator, a regeneration switching valve having a first piston, a switching spool, a first elastic member, and a second piston, a first damping orifice, and a second damping orifice.

REFERENCES:
patent: 3771558 (1973-11-01), Ailshie
patent: 4642019 (1987-02-01), Sutton
patent: 4723476 (1988-02-01), Stucky
patent: 5862831 (1999-01-01), Chung et al.

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