CHECK VALVE

Japanese Patent JP2018080767

A

PROBLEM TO BE SOLVED: To provide a check valve 1 capable of suppressing wear generated between a valve body 2 and a valve body supporting portion 7 movably supporting the valve body 2.SOLUTION: A check valve 1 has: an annular valve seat portion 6 equipped with an inflow port 5; a valve body 2; and a valve body supporting portion 7 which supports the valve body 2 so as to linearly move between a close position 2A where the valve body supporting portion 7 abuts on the valve seat portion 6 to close the inflow port 5 and an open position 2B where the valve body supporting port 7 separates from the valve seat portion 6. The valve body supporting portion 7 is equipped with a cylinder part 25 which opposes to the valve seat portion 6 at an interval in a linearly moving direction of the valve body 2, and projects out toward the valve seat portion 6 in the linearly moving direction. The valve body 2 is equipped with a valve portion 31 positioned between the valve seat portion 6 and the cylinder part 25, a shaft portion 32 which penetrates the cylinder part 25 to slide with an inner peripheral surface of the cylinder part 25, and a cylinder portion 33 which surrounds the cylinder part 25 from an outer peripheral side and slides with an outer peripheral surface of the cylinder part 25.SELECTED DRAWING: Figure 2

AWATSUHARA MITSUAKI

JP2016223850A

May 24, 2018

November 17, 2016

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NIPPO VALVE CO LTD

F16K15/06

JP2010090939A	2010-04-22
JPH0771632A	1995-03-17

WO2014021124A1	2014-02-06
US20120128470A1	2012-05-24

Toru Kawai
Kawaguchi Nobuko

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