Title:
RELIEF VALVE STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2017/103979
Kind Code:
A1
Abstract:
A relief valve structure (20) attached to a pump body (10) is provided with: a first discharge section (31) for discharging oil when a discharge pressure is a first predetermined pressure; a second discharge section (32) for discharging oil when a discharge pressure reaches a second predetermined pressure higher than the first predetermined pressure; a third discharge section (33) for discharging oil when a discharge pressure exceeds the first predetermined pressure and reaches a pressure lower than the second predetermined pressure or a second discharge pressure; and a pressure release hole (34) for releasing oil around a valve spring (23). The second discharge section, the first discharge section, the third discharge section, and the pressure release hole are provided in this order between an introduction section (29) and a spring hold-down member (24).
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Inventors:
WANG YU (CN)
DONG XIAOFENG (CN)
INOUE HIROKAZU (CN)
DONG XIAOFENG (CN)
INOUE HIROKAZU (CN)
Application Number:
PCT/JP2015/084965
Publication Date:
June 22, 2017
Filing Date:
December 14, 2015
Export Citation:
Assignee:
YAMADA MFG CO LTD (JP)
International Classes:
F16K17/04; F01M1/16
Foreign References:
| JP2014219028A | 2014-11-20 | |||
| JP2013019365A | 2013-01-31 | |||
| JP3179934U | 2012-11-22 |
Attorney, Agent or Firm:
SHIMODA, Yo-ichiro et al. (JP)
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