Pipe extractor tool
US4377956A · kind A · utility
24Cited by
6References
4Claims
0Family size
Inventor
Key dates
| Filing date | Jul 22, 1980 |
| Grant date | Mar 29, 1983 |
| Priority date | — |
| Expiry date | Jul 22, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B27/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pipe extractor tool has been devised for use in removal of broken pipe sections, such as, the riser in a sprinkler system and includes cams formed at the lower end of a hollow shank through which a push rod is inserted, the cams being movable under the urging of the push rod in a generally radially outward direction into firm gripping engagement with the inner wall of the pipe section to be removed so that a twist or torque can be applied to the tool to unthread and remove the broken pipe section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.