Method and apparatus for measuring the residual tension in a stud or a bolt
US4333351A · kind A · utility
40Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1980 |
| Grant date | Jun 8, 1982 |
| Priority date | — |
| Expiry date | Feb 25, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/255
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining the residual force or tension in a bolt or stud is presented. The bolt or stud in a previously tightened joint is stressed by the imposition of a pulling force, the resulting strain on the bolt is measured to develop a force-strain relationship, and the measured force-strain relationship is compared to previously determined force-strain relationships for the joint to determine the residual force or tension in the bolt or stud.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.