Pipe gripping head
US4304433A · kind A · utility
71Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1980 |
| Grant date | Dec 8, 1981 |
| Priority date | — |
| Expiry date | Mar 17, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pipe gripping head especially suitable for use with pipe handling apparatus in earth drilling operations. The pipe gripping head includes a pair of jaws operably pivotable between an open and a closed locked position which does not rely on pneumatic or hydraulic pressure to maintain the jaws in the closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.