Encapsulated elastomeric relief valve

Details Encapsulated elastomeric relief valve Encapsulated elastomeric relief valve

1998-05-18

2000-07-25

Neuder, William

Boring or penetrating the earth

With storage means for bit lubricant carried by bit or shaft

175228, 175371, E21B 1024

Patent

active

060926112

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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