Steel pump jack with safety latch and method
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United States of America Patent
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Dec 28, 2010
Grant Date -
Nov 22, 2007
app pub date -
Oct 24, 2005
filing date -
Oct 24, 2005
priority date (Note) -
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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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