Title:
SPOOL VALVE
Document Type and Number:
WIPO Patent Application WO/2017/061648
Kind Code:
A1
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.
Inventors:
KIM JIN WOOK (KR)
KANG MIN HEUK (KR)
KANG MIN HEUK (KR)
Application Number:
PCT/KR2015/010634
Publication Date:
April 13, 2017
Filing Date:
October 08, 2015
Export Citation:
Assignee:
VOLVO CONSTR EQUIP AB (SE)
KIM JIN WOOK (KR)
KANG MIN HEUK (KR)
KIM JIN WOOK (KR)
KANG MIN HEUK (KR)
International Classes:
F15B13/02; E02F9/20; E02F9/22; F16K11/10
Foreign References:
| KR100432381B1 | 2004-09-16 | |||
| KR20150036001A | 2015-04-07 | |||
| JP2015172427A | 2015-10-01 | |||
| JP2006132604A | 2006-05-25 | |||
| US3951162A | 1976-04-20 |
Other References:
See also references of EP 3361105A4
Attorney, Agent or Firm:
KIM, Seon-Min (KR)
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