Steel pump jack with safety latch and method

Details Steel pump jack with safety latch and method Steel pump jack with safety latch and method

2005-10-24

2010-12-28

Mitchell, Katherine W (Department: 3634)

Fire escape, ladder, or scaffold

Pole or strand grasping-type climber

C182S134000, C182S135000, C182S136000

Reexamination Certificate

active

07857096

ABSTRACT:
An upper shackle assembly for a steel pump jack for a wood pole includes a u-shaped shackle component to receive the wood pole. The assembly includes a crank handle that extends through the shackle component and engages the pole to lower the pump jack down the pole. The assembly includes a brake attached to the shackle component to engage with the pole if the crank handle fails. A method for installing a steel pump jack to a wood pole includes the steps of placing a u-shaped shackle component about the wood pole. There is the step of closing a brake with the shackle component to engage with the pole if a crank handle fails. There is the step of extending the crank handle through the shackle component to engage the pole. A steel pump jack.

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