Reactor vessel stud closure system
US4433828A · kind A · utility
10Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1981 |
| Grant date | Feb 28, 1984 |
| Priority date | — |
| Expiry date | Jan 29, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A quick-acting stud tensioner tool for enabling the loosening or tightening of a stud nut on a reactor vessel stud. The tool engages the vessel stud by closing a gripper mechanism around an upper end of the vessel stud upon a transfer of the mass of the tool from a hoist to a support structure surrounding the vessel stud. After the stud has been elongated, the gripper mechanism releases the vessel stud when the mass of the tool is transferred from the support structure surrounding the vessel stud to the hoist.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.