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Patent Searching and Data


Title:
CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2019/172131
Kind Code:
A1
Abstract:
A control valve (100) comprises: first and second pilot chambers (14, 15) facing both ends of a spool (12); a signal pressure path (18) for guiding the pilot pressure of each of the first and the second pilot chambers (14, 15), as the signal pressure for another device; an interconnection groove (19) for interconnecting the first pilot chamber (14) and the signal pressure path (18); an interconnection hole (20) for interconnecting the second pilot chamber (15) and the signal pressure path (18); and a check valve (21) disposed in the interconnection hole (20). The check valve (21) includes: a poppet part (50) for opening/closing the interconnection hole (20); and a spacer part (60) for restricting the amount of movement of the poppet part (50) in the opening direction. The control valve (100) further comprises a movement-restricting part (80) for restricting the movement of the spacer part (60) toward the poppet part (50).

Inventors:
KITANI, Toshiyuki (World Trade Center Bldg. 4-1, Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 〒1056111, JP)
Application Number:
JP2019/008149
Publication Date:
September 12, 2019
Filing Date:
March 01, 2019
Export Citation:
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Assignee:
KYB CORPORATION (World Trade Center Bldg, 4-1 Hamamatsu-cho 2-chome, Minato-k, Tokyo 11, 〒1056111, JP)
International Classes:
F15B11/00; F15B11/08; F16K3/26; F16K11/07; F16K15/06
Domestic Patent References:
WO2012124386A12012-09-20
Foreign References:
JPH09159036A1997-06-17
Attorney, Agent or Firm:
GOTOH & PARTNERS (Shoyu-Kaikan, 3-1 Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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