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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/037786
Kind Code:
This diaphragm valve (18) is provided with: a housing (20, 30) having formed therein a fluid flow path (21) and a valve chamber (22); a valve seat (24) provided in the housing (20, 30) so as to annularly surround the opening of the flow path (21), which is open to the valve chamber (22); a diaphragm valve body (40) which is formed from a resin, divides the valve chamber (22) into the fluid flow path (21) and a non-flow path, and moves into contact with and away from the valve seat (24); a reciprocating member (61) connected to the diaphragm valve body (40) and reciprocating in a predetermined direction, which is the direction in which the reciprocating member (61) moves toward and away from the valve seat (24); a pressing section (70, 12) for applying force to the reciprocating member (61) to press the diaphragm valve body (40) against the valve seat (24); and a restriction member (91, 94) which is formed in a thin plate-like shape from metal, is mounted to the outer edge of the reciprocating member (61) extending in the predetermined direction, deforms in the predetermined direction to permit the reciprocation of the reciprocation member (61), and restricts the movement of the reciprocation member (61) in the direction perpendicular to the predetermined direction.

ITAFUJI, Hiroshi (250Ouji 2-chome,Komaki-sh, Aichi 51, 〒4858551, JP)
KOUKETSU, Masayuki (250Ouji 2-chome,Komaki-sh, Aichi 51, 〒4858551, JP)
Application Number:
Publication Date:
March 01, 2018
Filing Date:
July 20, 2017
Export Citation:
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CKD CORPORATION (250 Ouji 2-chome, Komaki-shi Aichi, 51, 〒4858551, JP)
International Classes:
F16K7/17; F16K41/12
Foreign References:
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (Daiichi Hasegawa Bldg.6F, 13-24 Meieki 3-chome, Nakamura-ku, Nagoya-sh, Aichi 02, 〒4500002, JP)
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