|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 2 인용 특허 : 13|
A check valve adapted for mounting between any flanges and specifically between sanitary flanges in a piping system, the check valve comprising a stationary portion and a flexible portion; the single-piece rigid stationary portion including and supporting a valve seat; the single-piece molded elastomeric flexible portion including a flange gasket, a valve plug, flexible retaining arms for guiding and securing the valve plug movement with respect to the valve seat, and a visual means to indicate that the check valve is installed, permits flow in the desir...
The invention claimed is: 1. A check valve device for mounting between a pair of flanges in a process piping system comprising: a rigid plate having a port extending therethrough; a plug adapted to seal said port; a gasket for sealing between the pair of flanges, said gasket having a groove for receiving an outer edge of said rigid plate; and a flexible retaining means interconnecting between said gasket and said plug, said flexible retaining means guiding said plug between a position wherein said plug seals said port and a position wherein said plug al...