US PATENT SUBCLASS 251 / 1.3
.~ Radial reciprocating ram

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

1.1  DF  BLOW-OUT PREVENTERS (I.E., COOPERATING SEGMENTS OF ANNULUS) {2}
1.3.~ Radial reciprocating ram

DEFINITION

Classification: 251/1.3

Radial reciprocating ram:

(under subclass 1) Subject matter .l which includes a member mounted for reciprocation in a radial direction to exert and relieve pressure on one of the flow obstructing members to open and close the annular flow passage.