CHECK VALVE AND VACUUM SYSTEM
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United States of America Patent
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Issued Date -
Aug 23, 2012
app pub date -
May 23, 2011
filing date -
Feb 21, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A check valve includes a case body, a piston device, and a blocking plate. The case body includes a first case part and a second case part. The first case part has a first opening. The second case part has a second opening and a third opening. The second opening faces the first opening, and the third opening is located at one side of the second opening. The first case part and the second case part are combined to form the case body, and the case body has a fluid passage therein. The piston device is aligned to the second opening and mounted on the second case part. The blocking plate is disposed on the piston device. When the piston device operates, the piston device pushes the blocking plate to seal the first opening.
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