Check valve assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 1, 2001
Grant Date -
N/A
app pub date -
May 19, 1999
filing date -
Nov 11, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a check valve assembly and a valve assembly employing such a check valve assembly, a topping piston may be taken into contact with a main poppet to raise the main poppet from its seat. The main poppet is designed without significant area difference from the valve seat and the topping piston is actuated through a pilot valve, so that the process of raising the main poppet from the valve seat is controllable.
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