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Patent Searching and Data


Title:
DIAPHRAGM AND DIAPHRAGM VALVE
Document Type and Number:
WIPO Patent Application WO/2013/179738
Kind Code:
A1
Abstract:
[Problem] To provide: a diaphragm that, while having a single layer structure comprising only a rubber material, is not prone to a reduction in sealability the occurrence of cracks as a result of repeated up and down movements, and that is economical and has excellent durability; and a diaphragm valve equipped with said diaphragm. [Solution] This diaphragm, which attaches to a diaphragm valve, is characterized by having a single layer structure comprising a rubber material, and being provided with a membrane that moves up and down by deforming with the opening and closing of a flow channel; and a flange that is disposed around the membrane, and is sandwiched between a valve body and bonnet. The diaphragm is further characterized in that: the flange is provided with annular ridges, said ridges comprising an upper ridge that protrudes upward, and a lower ridge that protrudes downward from a position corresponding to the upper ridge; and the upper ridge comprises an inside upper ridge and an outside upper ridge having a protrusion height that is lower than the inside upper ridge, said ridges being continuously formed in a stepwise manner.

Inventors:
OBARA Shunji (3-2 Itachibori 2-chome, Nishi-ku, Osaka-sh, Osaka 12, 〒5500012, JP)
SHIMOMURA Yoshinori (3-2 Itachibori 2-chome, Nishi-ku, Osaka-sh, Osaka 12, 〒5500012, JP)
SOGAO Masahiko (3-2 Itachibori 2-chome, Nishi-ku, Osaka-sh, Osaka 12, 〒5500012, JP)
KOBAYASHI Keigo (3-2 Itachibori 2-chome, Nishi-ku, Osaka-sh, Osaka 12, 〒5500012, JP)
Application Number:
JP2013/058018
Publication Date:
December 05, 2013
Filing Date:
March 21, 2013
Export Citation:
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Assignee:
KABUSHIKI KAISHA FUJIKIN (3-2 Itachibori 2-chome, Nishi-ku Osaka-sh, Osaka 12, 〒5500012, JP)
International Classes:
F16J3/02; F16K7/12; F16K7/17
Domestic Patent References:
WO2011122424A12011-10-06
Foreign References:
JPH0596630U1993-12-27
JPS63137175U1988-09-09
JP2009002442A2009-01-08
JPH11501107A1999-01-26
JPH10318368A1998-12-04
Attorney, Agent or Firm:
KIYOHARA Yoshihiro (1-3 Dojimahama 2-chome, Kita-ku Osaka-sh, Osaka 04, 〒5300004, JP)
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