|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F16K-015/03 F16K-037/00 F16L-023/02|
|미국특허분류(USC)||137/5157 ; 137/557 ; 137/875 ; 285/412|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 4 인용 특허 : 1|
An alarm check valve has a tubular body arranged to fit within a pipe line, such as of a sprinkler system. The valve member is pivoted within the body so as to permit one way flow, and is spring biased towards the closed position. A secondary outlet port is normally covered by the closed valve member. When the valve is opened and fluid is flowing, some fluid can flow out the secondary port to operate an alarm.
A wafer alarm check valve, said valve including: an annular body providing a main flow passage therthrough; opposite ends of said body having substantially flat end faces capable of being held between oppositely disposed flanges of a pipeline by bolts clamping said flanges towards one another with said bolts positioned about the periphery of said end faces of the valve to sandwich the valve between the flanges; a pivotally mounted clapper within said body having a closed position capable of closing off said main flow passageway, and capable of being pivo...