Encapsulated elastomeric relief valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 25, 2000
Grant Date -
N/A
app pub date -
May 18, 1998
filing date -
May 28, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A relief valve for use in roller cone drilling bits of the sealed bearing type and other types of sealed fluid systems. The relief valve includes a valve body arranged to fit into the lubricating system of the bit and an elastomeric valve member having a flow port therein that is normally closed. The valve member includes a flexible lip defining the port that is arranged to permit flow in one direction through the port to relieve pressure above a predetermined value while preventing flow therethrough in the opposite direction.
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