|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/527.2; 137/015.19; 251/363|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 4 인용 특허 : 164|
A check valve assembly has a body having a central cavity intersected by upstream and downstream flow passages. A seat is secured by a threaded engagement in the upstream flow passage. An access bore intersects the cavity and has a support shoulder formed in it. A holder is supported on the support shoulder. A flapper is pivotally secured to the holder and located in the cavity for movement between an open position and a closed position blocking flow through the seat. A straight edge portion in the access bore engages a straight edge portion of the holde...
1. A check valve assembly, comprising: a body having a central cavity intersected by upstream and downstream flow passages;a shoulder formed in the body;a holder positionable onto the shoulder, the holder including a lip extending around its periphery to facilitate complimentary engagement with the shouldera flapper pivotally secured to the holder, the flapper movable between a closed position, to block fluid flow through the upstream flow passage, and an open position, to enable fluid flow through the upstream flow passage; anda seat disposed proximate ...