Pressure cap
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United States of America Patent
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Mar 25, 2003
Grant Date -
Mar 28, 2002
app pub date -
Jun 25, 2001
filing date -
Sep 28, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cap body of a synthetic resin includes a cylindrical portion having an external thread formed on its outer peripheral surface, the cylindrical portion having at its lower end a shoulder or an annular groove for receiving an O-ring. The cylindrical portion has on its inner peripheral surface an annular, internally flanged valve stopper which provides a support for a locking rib of a pressure valve. The pressure valve includes deformation slits formed along the outer periphery of a pot-shaped valve body, and a seal plate disposed on the bottom surface of the valve body.
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