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    • 7. 发明授权
    • Steel pump jack with safety latch and method
    • 钢泵千斤顶带安全闩锁和方法
    • US08286753B2
    • 2012-10-16
    • US12655999
    • 2010-01-12
    • Brett A. LatimerRobert D. Beggs
    • Brett A. LatimerRobert D. Beggs
    • E04G1/18
    • B66F19/00B66F1/02Y10T29/53Y10T292/03
    • 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.
    • 用于木杆的钢泵千斤顶的上部卸扣组件包括用于接收木杆的u形钩环部件。 该组件包括一个曲柄手柄,该手柄延伸穿过该钩环部件并接合该极点,以将该泵压头向下降低。 组件包括附接到钩环部件的制动器,如果曲柄手柄失效则与制动杆接合。 将钢泵千斤顶安装在木杆上的方法包括将u形钩环部件放置在木杆周围的步骤。 如果一个曲柄手柄出现故障,那么这个步骤就是用钩环部件闭合制动器,以便与杆接合。 具有通过钩环部件延伸曲柄手柄以接合杆的步骤。 钢泵千斤顶。