Pump jack assembly

Details Pump jack assembly Pump jack assembly

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 47/00 (2006.01) E21B 17/00 (2006.01) F04B 53/00 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2631861

A pump jack assembly is disclosed, comprising a pump jack having a horsehead, a rod coupled to the horsehead, and a friction brake attached to the rod. The friction brake allows rotation of the rod in a first direction relative to a reference frame, but frictionally locks the rod upon reversal of the rotation of the rod to prevent back-spin of the rod. In some embodiments, the pump jack assembly further comprises a rod rotator coupled to the rod that, in operation, causes the rod to rotate in the first direction relative to the fixed reference frame.

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