Check valve and backflow preventer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 20, 1998
Issued Date -
N/A
app pub date -
Aug 7, 1996
filing date -
Aug 11, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A check valve or backflow preventer has a valve mechanism mounted to a valve cover for removal and replacement as a unit. The valve clapper is resiliently supported to accommodate variations in tolerance. The valve seat is removably secured within the valve body by compression of a resilient seal ring to engage opposed walls of the seat and body. A spring pretensioning member facilitates safe replacement and removal of the valve mechanism.
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Cited Art Landscape
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