Title:
VANED SPOOL TYPE DIRECTIONAL CONTROL VALVE AND FOUR-WAY REVERSIBLE VALVE FOR COOLING CYCLE SYSTEM USING THE SAME
Document Type and Number:
WIPO Patent Application WO2003071851
Kind Code:
A3
Abstract:
A vaned spool type directional control valve used to change a direction of motion of an actuator in an air pressure or oil hydraulic circuit includes a vaned spool having a valve portion and a vane portion integrally formed on a spool shaft. A chamber including a shaft support portion, a valve room, and a vane room is formed corresponding to the vaned spool. Main ports connected to the valve room in the chamber and two vane ports penetrating the opposed sides of the vane room are formed in the directional control valve. The directional control valve is of a pilot operated type so that flow of fluid in a main circuit can be changed by rotating the vane spool using the pressure of a pilot fluid.
Inventors:
LEE YUN-BOON (KR)
Application Number:
PCT/KR2003/000366
Publication Date:
November 27, 2003
Filing Date:
February 24, 2003
Export Citation:
Assignee:
LEE YUN-BOON (KR)
International Classes:
F16K31/12; F15B13/04; F15B13/043; F16K11/052; F16K11/076; F16K11/085; F25B41/04; (IPC1-7): F16K13/00
Foreign References:
| JPS5267857A | 1977-06-04 | |||
| JPH11325634A | 1999-11-26 | |||
| JPH11287535A | 1999-10-19 |
Other References:
See also references of EP 1488148A4
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