Backflow prevention assembly
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United States of America Patent
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-
Feb 27, 2001
Grant Date -
N/A
app pub date -
Dec 3, 1999
filing date -
Dec 3, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A backflow prevention assembly has a unitary housing with a passage therethrough, two threaded regions formed in an inner surface of the unitary housing, and two valve assemblies positioned in the passage to prevent fluid flow in a direction. Each valve assembly has an annular mount having a threaded outer surface that engages one of the threaded regions on the inner surface of the housing. The threads can be formed by placing a die having a thread on an outer surface thereof in contact with an inner surface of the unitary housing, and pressing on the outer surface of the housing.
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