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1. (WO2017061648) SPOOL VALVE

Pub. No.:    WO/2017/061648    International Application No.:    PCT/KR2015/010634
Publication Date: Fri Apr 14 01:59:59 CEST 2017 International Filing Date: Fri Oct 09 01:59:59 CEST 2015
IPC: F15B 13/02
E02F 9/20
E02F 9/22
F16K 11/10
Applicants: VOLVO CONSTRUCTION EQUIPMENT AB
볼보 컨스트럭션 이큅먼트 에이비
KIM, Jin Wook
김진욱
KANG, Min Heuk
강민혁
Inventors: KIM, Jin Wook
김진욱
KANG, Min Heuk
강민혁
Title: SPOOL VALVE
Abstract:
The present invention provides a spool valve, comprising: a valve block; a first spool, which is mounted onto one side on the inside of the valve block so as to be moved forward and backward in the lengthwise direction and comprises a first notch formed on the outer circumferential surface, for controlling the connection between a first pump flow path and a first cylinder flow path through the first notch which is aligned with the first pump flow path and the first cylinder flow path formed on the inside of the valve block, when moved according to a change in stroke; and a second spool, which is mounted onto the other side on the inside of the valve block so as to be moved forward and backward in the lengthwise direction and comprises a second notch formed on the outer circumferential surface, for controlling the connection between a second cylinder flow path and a first tank flow path through the second notch which is aligned with the second cylinder flow path and the first tank flow path formed on the inside of the valve block, when moved according to a change in stroke.