Title:
BACKFLOW PREVENTION ASSEMBLY
Document Type and Number:
WIPO Patent Application WO2001040586
Kind Code:
B1
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.
Inventors:
ENGELMANN LESTER (US)
Application Number:
PCT/US2000/032718
Publication Date:
November 15, 2001
Filing Date:
December 01, 2000
Export Citation:
Assignee:
WATTS INVEST COMPANY (US)
ENGELMANN LESTER (US)
ENGELMANN LESTER (US)
International Classes:
E03B7/07; F16K15/03; (IPC1-7): E03C1/10; F16K15/03
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