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Patent Searching and Data


Title:
CHECK VALVE
Document Type and Number:
WIPO Patent Application WO/2019/188947
Kind Code:
A1
Abstract:
Provided is a check valve which can be reduced in size and in which the occurrence of chattering can be suppressed. This check valve is disposed in a flow passage for fluid and is provided with: a seat member having a large-diameter section and a small-diameter section, which are provided at the inner periphery of the seat member, and having a seat section which is provided between the large-diameter section and the small-diameter section; a valve body pressed against the seat section to close the flow passage; and a casing having formed therein a valve chamber which contains the valve body so that the valve body is movable in an axial direction. The large-diameter section has an inner diameter greater than the outer diameter of the valve body entering the large-diameter section in the axial direction. A clearance through which the fluid flows is provided between the large-diameter section and the valve body. The diameter of the large-diameter section is less than or equal to 1.2 times the diameter of the valve body.

Inventors:
NAKAMURA, Noritaka
KATO, Kodai
KIYOSE, Hiromitsu
SAKATA, Yukinobu
Application Number:
JP2019/012426
Publication Date:
October 03, 2019
Filing Date:
March 25, 2019
Export Citation:
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Assignee:
KAWASAKI JUKOGYO KABUSHIKI KAISHA (1-1 Higashikawasaki-cho 3-chome, Chuo-ku Kobe-sh, Hyogo 70, 〒6508670, JP)
International Classes:
F16K47/02; F16K15/02
Foreign References:
JP2008509365A2008-03-27
JPS4811618A
JP2007292148A2007-11-08
EP2299155A12011-03-23
JP2003161381A2003-06-06
JP2005098155A2005-04-14
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (3rd Fl, Bo-eki Bldg. 123-1, Higashimachi, Chuo-ku, Kobe-sh, Hyogo 31, 〒6500031, JP)
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