Drain valve
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United States of America Patent
Stats
-
Nov 24, 1987
Grant Date -
N/A
app pub date -
Nov 14, 1986
filing date -
Nov 14, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The valve includes a valve member adapted to be moved axially between open and closed positions in a valve housing when the valve member is rotated. The valve member includes a passage for admitting air into a vacuumized vessel and includes a separate passage for draining liquid from the vessel when the valve member is in its open position. An O-ring establishes a primary seal between the valve member and the valve housing and is retained within the housing in all positions of the valve member.
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