Check valve
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United States of America Patent
Stats
-
Aug 3, 1993
Grant Date -
N/A
app pub date -
Mar 9, 1992
filing date -
Mar 18, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A check valve includes a spherical closing member arranged in a flow duct of a valve body. The flow duct includes guide ribs with stop surfaces. The spherical closing member is displaceable by medium flowing through the valves between the stop surfaces and a sealing portion. An annular portion is arranged between the sealing portion and the guide ribs. The annular portion has an internal bore which is slightly greater than the diameter of the spherical closing member. Starting from the equator of the spherical closing member resting against the sealing member, the partial length of the internal bore of the annular portion in flow direction of the medium is 1/7 to 1/2 of the diameter of the spherical closing member.
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