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Patent Searching and Data


Title:
GATE VALVE
Document Type and Number:
WIPO Patent Application WO/2013/077164
Kind Code:
A1
Abstract:
A gate valve is provided with a body section (1) and a seal section (2) which is in contact with the peripheral edge of the gate when the gate valve is closed. The seal section (2) includes a first portion (2A) having a protruding shape and a second portion (2B) having a protruding shape, the first and second portions (2A, 2B) being provided so as to extend along the peripheral edge of the body section (1) and protruding from a main surface (1A) when the gate valve is open. The amount (H1) of protrusion of the first portion (2A) from the main surface (1A) is larger than the amount (H2) of protrusion of the second portion (2B) from the main surface (1A). The first portion (2A) is provided further toward the inner peripheral side of the main surface (1A) than the second portion (2B).

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Inventors:
KHAN MAKSUD UDDIN (JP)
YOSHIDA TSUTOMU (JP)
Application Number:
JP2012/078322
Publication Date:
May 30, 2013
Filing Date:
November 01, 2012
Export Citation:
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Assignee:
NIPPON VALQUA INDUSTRIES, LTD. (1-1 Osaki 2-chome, Shinagawa-ku Tokyo, 24, 〒1416024, JP)
International Classes:
F16K3/02; F16J15/10; F16K1/00; F16K3/00; F16K39/04; F16K51/02
Domestic Patent References:
WO2010032722A12010-03-25
WO2009107495A12009-09-03
WO2008120349A12008-10-09
Foreign References:
JP2006220229A2006-08-24
JP2010038308A2010-02-18
JPH08219290A1996-08-27
JP2008075827A2008-04-03
JP2011231908A2011-11-17
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (Nakanoshima Central Tower, 2-7 Nakanoshima 2-chome, Kita-ku, Osaka-sh, Osaka 05, 〒5300005, JP)
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Claims: