Backflow preventer
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United States of America Patent
Stats
-
Jun 24, 2008
Grant Date -
Jan 19, 2006
app pub date -
Dec 5, 2003
filing date -
Dec 10, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A backflow preventer (1) having a mounting housing (2) that is inserted into a fluid conduit (3) is provide and includes at least one sealing ring (4) which is supported within an annular groove (5) located on the outer circumference of the mounting housing (2) and has a sealing effect between the mounting housing (2) and the fluid conduit (3). The backflow preventer provides that the sealing ring (4) can be moved counter to a restoring force from a sealing position into a leakage position so as to compensate pressure when the backflow preventer (1) is closed and a fluid volume is sealed on the outflow side, thereby conteracting an excessive increase in internal pressure.
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International Classification(s)
Cited Art Landscape
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