Power tong apparatus
US4125040A · kind A · utility
18Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1977 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | Sep 29, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus for control of a power tong for imparting torque to a tubular member to make a threaded connection with another member, torque being sensed by means such as a strain gauge and torque transducer. Cams are provided to coact with the throttle or motor valve lever of the power tong and are disengageable to allow the throttle or valve lever to move to an idle or neutral position when torque being imparted to the tubular member reaches a predetermined amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.