Hydraulic bolt tensioner
US4998453A · kind A · utility
27Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1989 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Oct 3, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B29/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hydraulic bolt tensioner for tensioning a threaded bolt extending from a fixed component include a cylinder adapted to react against the component, a piston slidably mounted in the cylinder and having an axial bore therein through which the bolt extends, the piston reacting against a reaction member threaded on the bolt, and a source of hydraulic fluid. Defined within the cylinder are a first chamber the supply of fluid under pressure to which effects powered extension of the piston within the cylinder, and a second chamber the supply of fluid under pressure to which effects powered retraction of the piston within the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.