Device for gripping a pipe or bar
US6991265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2003 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Apr 17, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L37/23
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A device for gripping the external wall surface of a pipe or bar. The device includes a tubular body having at least one end open for insertion of a pipe or bar, and a cage with balls or rollers cooperating with a first tapered internal wall part of the body. A resilient mechanism pushes the cage in an axial direction to cause the balls or rollers to grip the external wall of an inserted pipe or bar. The device also has a compressible member located within the body and cooperating with a second tapered inner wall part of the body and movable relative thereto when increased fluid pressure is present within the body. Under increased pressure it also grips the external wall of the inserted pipe or bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.