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Patent Searching and Data


Title:
HYDRAULIC VALVE
Document Type and Number:
WIPO Patent Application WO/2019/187563
Kind Code:
A1
Abstract:
In order to accurately control the supply of oil even when using two spools, this hydraulic valve is provided with: two spools (30) arranged on a valve body (41) in parallel so as to be capable of individually moving along the axial direction, the respective end sections thereof being housed in a shared pressure chamber (42); and return springs (46) provided to each spool so as to be interposed between the spools and the valve body. The hydraulic valve controls the flow of oil to oil passages (21, 23, 25a, 25b, 26a, 26b) connected to the valve body by moving the two spools relative to the valve main body against the spring force of the respective return springs when pilot pressure is supplied to the pressure chamber. The hydraulic valve is further provided with a connecting member (45) which is arranged so as to bridge the two spools, and is interposed between the respective spools and return springs, and is thus pressed in the direction approaching the spools.

Inventors:
MIYAMOTO, Yuusuke (2-3-6 Akasaka, Minato-k, Tokyo 14, 〒1078414, JP)
HISHINUMA, Yuichi (2-3-6 Akasaka, Minato-k, Tokyo 14, 〒1078414, JP)
TAMURA, Shunsuke (2-3-6 Akasaka, Minato-k, Tokyo 14, 〒1078414, JP)
Application Number:
JP2019/002327
Publication Date:
October 03, 2019
Filing Date:
January 24, 2019
Export Citation:
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Assignee:
KOMATSU LTD. (2-3-6, Akasaka Minato-k, Tokyo 14, 〒1078414, JP)
International Classes:
F16K11/07; F16K3/24
Foreign References:
JPH0557537U1993-07-30
JPH03103685A1991-04-30
JP2000097366A2000-04-04
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (Toranomon Mitsui Building, 8-1 Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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