Patent ID: 7878767

Claim:
A valve for a pumping system comprising, in combination: a hydraulic piston having a north end and a south end and a pedestal at the north end thereof; a containment union having a north end and a sooth end and an interior passage therethrough; a ported stem having a north end and a south end; wherein the ported stem has a plurality of veins located on an exterior portion thereof, and extending in one of a west to east and an east to west direction; wherein a lower portion of each of the plurality of veins is open to an interior of the ported stem and wherein an upper portion of each of the plurality of veins is closed; wherein the ported stem further comprises a plurality of regions of increased circumference located on an exterior portion thereof, adapted to contact a lower portion of the containment union; wherein a lower interior portion of the ported stem defines a passage terminating at a north end thereof in a cap, and wherein there is fluid communication between the interior passage and the open lower portion of each of the plurality of veins; a containment cage having a north end and a south end and adapted to be reciprocally positioned over a portion of the ported stem and to be coupled at its north end to the south end of the containment union; wherein the containment cage further comprises an interior, annular rim proximate the south end thereof, and wherein the interior annular rim is configured to prevent movement of the regions of increased circumference thereby; and a drag plunger having a north end and a south end, and adapted to be coupled at its north end to the south end of the ported stem.