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US 2003/0201012 A1Published application
Check valve device
AssigneeSMC Corporation
InventorYoshihiro Fukano
Life of this patent
Estimating the term…
Abstract
A check valve device includes a valve section of a valve plug arranged in a fluid passage of a body, the valve plug being in a valve-opened state when separated from a seat section, and the valve plug being in a valve-closed state when seated on the seat section, and an elastic member which urges the valve section by the spring property of bent spring sections so that the valve section is seated on the seat section. The body, the valve plug, and the elastic member are formed of resin materials.
Claims7
A check valve device comprising:
- a body having a fluid passage communicating with a first port and a second port;
- a valve plug arranged in said fluid passage of said body, said valve plug being in a valve-opened state when separated from a seat section, and said valve plug being in a valve-closed state when seated on said seat section;
- and
- an elastic member arranged in said fluid passage of said body and urging said valve plug so that said valve plug is seated on said seat section,
- wherein said body, said valve plug, and said elastic member are formed of resin materials,
- said elastic member includes a plurality of legs, spring sections bent from ends of said legs, and an annular member connected to ends of said spring sections, and said annular member installed to said valve plug is capable of approaching said legs or separating from said legs when said spring sections bends.
3 more elements
Dependencies are inferred from the claim text.