Valves and valve actuation – Reciprocating valve – Gate
Reexamination Certificate
2007-08-14
2007-08-14
Bastianelli, John (Department: 3753)
Valves and valve actuation
Reciprocating valve
Gate
C251S329000
Reexamination Certificate
active
11563019
ABSTRACT:
An improved gate valve has a main body defining a flow passage, and a cylindrical gate member, which has a continuous seal disposed within a groove in the gate surface. The gate is actuated by a valve stem movable through a bonnet connected to the main body, with the longitudinal axis of the stem being offset from the longitudinal axis of the gate. The inner end of the stem is retainingly received in a recessed slot in the gate such that the valve stem can rotate relative to the gate and such that longitudinal movement of the stem will cause corresponding movement of the gate. The offset between the stem and gate axes keeps the gate in the same orientation relative to the gate chamber regardless of the gate's longitudinal position.
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Weatherford, “Rod Lock CBM Composite Pumping Tee”, brochure excerpt, 2 pages.
Domino Machine, “Integral Production BOP”, Information Sheet, 1 page.
Harder Werner
Sedens Dietmar R.
Bastianelli John
Domino Machine Inc.
Tomkins Donald V.
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