发明名称 |
Steel Pump Jack With Safety Latch and Method |
摘要 |
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. |
申请公布号 |
US2014090928(A1) |
申请公布日期 |
2014.04.03 |
申请号 |
US201213633675 |
申请日期 |
2012.10.02 |
申请人 |
LATIMER BRETT A.;BEGGS ROBERT D. |
发明人 |
LATIMER BRETT A.;BEGGS ROBERT D. |
分类号 |
A63B27/00;B23P11/00 |
主分类号 |
A63B27/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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