Patent ID: 8776627

Claim:
A drive assembly for a reciprocating pump including a polish rod arranged to be supported for reciprocating movement relative to a wellhead, the drive assembly comprising: a support frame arranged to be supported in proximity to the wellhead; a linear actuator including a lower portion arranged to be fixed to the support frame and an upper portion supported on the lower portion for linear reciprocating movement between a lowered position and a raised position; a pump bracket arranged to be coupled to the polish rod of the reciprocating pump; an anchor bracket arranged to be fixed to the support frame; two pairs of direction altering cable guides supported on the upper portion of the linear actuator; and four lengths of cable in which each length of cable comprises: a first portion substantially anchored to the pump bracket; a second portion substantially anchored to the anchor bracket; and an intermediate portion extending through a respective one of the direction altering cable guides on the upper portion of the linear actuator between the first portion and the second portion.