Internal gripping pipe wrench
US6675679B2 · kind B2 · utility
15Cited by
17References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Jul 3, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/5083
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Disclosed is a wrench that grips the internal surface of a pipe to be turned. When torque is applied to the wrench, one or more gripping surfaces are forced apart by a cam mechanism. The gripping surfaces tightly engage the internal surface of the pipe in response to movement of an internal cam. Torque applied to the wrench causes the pipe to turn. Because the wrench grips the internal diameter of a pipe, it can be used without damaging the external surface of the pipe, and used in very confined spaces. The gripping surfaces distribute the gripping load evenly across the pipe, which minimizes any deformation of the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.