초록 ▼

A wall mounted water hydrant has an elongated hollow housing with water inlet and outlet ends, and a center axis; an inlet valve in the housing adjacent to the inlet end, including a valve seat and a valve body; a water outlet port in the housing adjacent to its outlet end; a valve operating rod in

A wall mounted water hydrant has an elongated hollow housing with water inlet and outlet ends, and a center axis; an inlet valve in the housing adjacent to the inlet end, including a valve seat and a valve body; a water outlet port in the housing adjacent to its outlet end; a valve operating rod in the housing with an inner end secured to the valve body and extending along the center axis to the outlet end of said housing, terminating in an outer end; a handle attached to the rod outer end, which when rotated in one direction closes the valve body against the valve seat, and in the other opposite direction moves the valve body away from the seat, thus allowing pressurized water from the inlet to flow downstream through the housing and outlet port; and a backflow preventor secured to the valve downstream from its seat. The elastomeric backflow preventor has a bell shape comprising a cylindrical body smaller than the interior of the housing and thin flexible side walls extending from the body outwardly and downstream to end in a lip portion which normally engages the interior walls of the housing. The backflow preventor has an open inner end with an inwardly extending shoulder which frictionally fits into an annular groove of the valve body. The inner end of the preventor abuts an annular shoulder on the valve body and is held thereagainst by a locking band.

대표청구항 ▼

A valve casing and backflow preventor for a wall hydrant, comprising a hollow valve casing of one piece construction having first and second ends, a bell shaped flexible backflow preventor having open first and second ends, said second end of said backflow preventor having a peripheral sealing surfa

A valve casing and backflow preventor for a wall hydrant, comprising a hollow valve casing of one piece construction having first and second ends, a bell shaped flexible backflow preventor having open first and second ends, said second end of said backflow preventor having a peripheral sealing surface, said second end of said backflow preventor extending outwardly beyond the second end of said valve casing, said valve casing having a tapered annular shoulder on its second end adapted to have the first end of said backflow preventor fitted thereover, an annular groove in said valve casing adjacent said annular shoulder, and an inwardly projecting annular shoulder on said first end of said backflow preventor mounted in tight engagement within the annular groove in said valve casing; said inwardly projecting annular shoulder being sufficiently large to be frictionally fitted over said tapered annular shoulder on said valve casing for insertion into the annular groove in said valve casing.