Patent ID: 6948521
Filing Date: 2005-09-27
Classification: F16K,Y10T

Abstract:
1. 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 central ring member, a plurality of legs extending radially outwardly from said central ring member, said central ring member and said plurality of legs lying in a common plane, spring sections bent from ends of said legs, said spring sections being thin-walled as compared with 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 bend.