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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/314 ; 137/526|
|발명자 / 주소||
|인용정보||피인용 횟수 : 20 인용 특허 : 0|
In a ventilating valve adapted to be connected to a pipe in which, when the pressure in said pipe is below the ambient pressure, said pressure is equalized by causing ambient air to enter said pipe, said valve comprising an annular valve means, the pressure in a valve chamber communicating with the pipe acting on one side of said valve means while ambient pressure acts on the other side thereof through an inlet opening to the valve chamber, said inlet opening being defined by stays which extend between two seats co-operating with the valve means, there i...
An air valve connectable to a pipe to relieve vacuum in said pipe while preventing escape of fluid therefrom, said valve including: a body having an inner chamber and air inlet means for communicating said inner chamber with the ambient atmosphere, said air inlet means including inner and outer concentrically spaced valve seats, an annular water collecting groove immediately surrounding said outer valve seat, a valve element displaceably mounted in said inner chamber, said valve element being normally urged to a valve closed position and being shiftable ...