发明名称 |
TONG GEAR SHIFT SYSTEM |
摘要 |
<p>A power tong having a ring gear, a gear train, a motor and a gear shift mechanism. The gear shift mechanism further includes a linear actuator and a shift arm connect to the linear actuator. A drive gear is positioned on a drive shaft extending from the motor and this drive gear includes an upper and lower set of drive teeth having beveled top portions. The shift arm engages the drive gear between the upper and lower set of drive teeth and movement of the linear actuator causes the drive gear to engage one of at least two gears in the gear train.</p> |
申请公布号 |
CA2630096(C) |
申请公布日期 |
2011.04.05 |
申请号 |
CA20082630096 |
申请日期 |
2008.04.28 |
申请人 |
BUCK, DAVID A.;GRAVOUIA, MARK |
发明人 |
BUCK, DAVID A.;GRAVOUIA, MARK |
分类号 |
F16H3/22;E21B19/16;F16H55/08;F16H55/17;F16H61/28 |
主分类号 |
F16H3/22 |
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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