Suspension of adjustable pipe spinner
US4478111A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1982 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Aug 29, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/168
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well pipe spinner includes two body parts carrying rollers and mounted by two pivotal connections for swinging movement between a closed position in which the rollers grip and drive a well pipe and an open position releasing the pipe. A structure extends between and interconnects the two pivotal connections in a relation permitting relative adjustment of their pivotal axes toward and away from one another for gripping different sizes of pipe. The tool is supported by a structure which is adapted to be suspended from a line or other element and which suspends the two body parts and pivotal connections at essentially the locations of the two pivotal axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.