Flow rate control valve device and flow force reduction structur

Details Flow rate control valve device and flow force reduction structur Flow rate control valve device and flow force reduction structur

1992-07-27

1993-12-21

Rosenthal, Arnold

Fluid handling

Systems

Multi-way valve unit

13762534, 1374844, 25112908, F16K 136

Patent

active

052714306

ABSTRACT:
A flow rate control valve device for controlling and then supplying fluid under pressure to an actuator such as an hydraulic cylinder or the like which includes a valve body having a drain port kept at a low pressure and a main spool slidably mounted in the valve body to connect or disconnect the drain port with a pressure chamber. Notch grooves are formed on an outer peripheral surface of the main spool. A spring is interposed between the valve body and the main spool to urge the spool to a valve body seat. A pushing device is provided for pushing the main spool against the resilient force of the spring. A plate member is provided on the main spool in the drain port for causing pressurized flow through the notch grooves to flow first in a substantially radial direction of the main spool and subsequently into the drain port so part of the pressurized fluid impinges on the plate member for exerting a force urging the main spool in the direction disengaging the spool from the seat against a force of the spring and a flow force acting between the spool and the seat for at least cancelling the flow force.

REFERENCES:
patent: 1120118 (1914-12-01), Ashlock
patent: 3791413 (1974-02-01), Muller et al.
patent: 4245816 (1981-01-01), Johnson
patent: 4314585 (1982-02-01), Nishimiya et al.
patent: 4316599 (1982-02-01), Bouvet et al.

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