High vacuum valve construction
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 10, 1982
Grant Date -
N/A
app pub date -
Feb 21, 1980
filing date -
Feb 26, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A high vacuum valve comprises a casing having a valve inlet port and a va outlet port connected to the inlet port with a valve seat defined between the inlet and outlet ports. The casing also defines a valve movement passageway and a valve member is movable in the housing along the passageway between a position in which it is aligned with the valve seat for closing the valve and one in which it is out of alignment with the seat to open the valve. The valve member includes two separate relatively movable plate parts both of which move along the passageway together and one of which is movable when the valve member is aligned with the valve seat so as to move into engagement with the seat. For this purpose a fluid pressure operated force transmissive device is located between the two plate parts and when supplied with fluid pressure it is effective to move one of the plate parts firmly against the seat while it is braced against the other plate part with the other plate part itself being braced by the passageway of the casing.
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