Vacuum valve
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United States of America Patent
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-
Nov 10, 1998
Grant Date -
N/A
app pub date -
Jun 12, 1996
filing date -
Aug 12, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A vacuum valve is used in vacuum systems having connectors including an internally threaded system component with connector seal, a KF-thread flange with connector seal, and a nut collar with clamping rings and pipe. The valve includes one valve case with an interior and at least two spaced apart openings communicating with the interior. The case defines a valve seat and has a valve member movable in the interior and into positions against the valve seat and away from the valve seat to close and open the valve. A driver is connected to the valve case for moving the valve member. A separate externally threaded nipple is provided around each opening and special sealing surfaces are on each nipple for connection to each of the vacuum system connectors in a vacuum-tight manner.
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