Patent ID: 9395006
Filing Date: 2016-07-19
CPC Classification: F16K,Y10T

Claim Text:
1. A check valve which is configured to bring an opening of a fluid path formed in a body into a closed state by bringing a valve element biased by a biasing member into contact with a sealing member, and to bring the opening into an open state by moving the valve element against a biasing force of the biasing member when a fluid pressure of a predetermined value or more is applied in the fluid path formed in the body, wherein the sealing member is formed of a post-cured perfluoro elastomer packing, an annular sealing portion which is brought into line contact with the sealing member is formed on the valve element, the valve element includes a circular columnar portion in which a fluid release path constituting a path for a fluid in an open state is formed, and a circular plate portion which is contiguously formed with a distal end side of the circular columnar portion and closes the opening formed in the body, and the annular sealing portion of the valve element is formed of a first inclined surface which extends radially outwardly on a distal-end-side surface of the circular columnar portion, and a second inclined surface which is contiguously formed with the first inclined surface and extends radially outwardly.