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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||239/572; 239/570; 239/203; 239/204; 239/533.15; 137/068.14; 137/071; 137/517|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 6 인용 특허 : 11|
A safety valve for a lawn sprinkler system having at least one subterranean flow line and at least one head for spraying irrigation water. The valve includes a tubular member connected between the flow line and the head. The tubular member has an axial passage therethrough for the flow of water from the flow line to the head. A seat is located within the passage. A ball is located in the passage upstream of the seat. The ball is axially movable from an open position upstream of the seat to a closed position in engagement with the seat if the water flowin...
The invention claimed is: 1. A flow line safety valve, comprising: a tubular member for connection to the flow line, the tubular member having a passage therethrough for the flow of fluid from the flow line; a seat located within the passage; a valve element located in the passage upstream of the seat, the valve element being movable from an open position upstream of the seat to a closed position in engagement with the seat if the fluid flowing through passage reaches a selected flow rate; a bias member that biases the valve element toward the open posi...