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 |
US8286753(B2) |
申请公布日期 |
2012.10.16 |
申请号 |
US20100655999 |
申请日期 |
2010.01.12 |
申请人 |
LATIMER BRETT A.;BEGGS ROBERT D.;WERNER CO. |
发明人 |
LATIMER BRETT A.;BEGGS ROBERT D. |
分类号 |
E04G1/18 |
主分类号 |
E04G1/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|