发明名称 |
Power tongs |
摘要 |
A power tong includes a frame and a pipe-gripping mechanism associated with a throat at one end of the frame. Power is transmitted to the pipe-gripping mechanism from a power unit through a drive train. The pipe-gripping mechanism cooperates with the throat to receive a pipe section to be rotated and includes a partial ring rotatably mounted within the frame and hav
|
申请公布号 |
US4404876(A) |
申请公布日期 |
1983.09.20 |
申请号 |
US19800135176 |
申请日期 |
1980.03.28 |
申请人 |
ECKEL MANUFACTURING CO., INC. |
发明人 |
ECKEL, EMERY L. |
分类号 |
E21B19/16;(IPC1-7):B25B17/00 |
主分类号 |
E21B19/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|