Apparatus for testing performance of clamp screw in elastic and plastic regions
US4719804A · kind A · utility
7Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1986 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Aug 14, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for testing performances of a screw consisting of a bolt and a nut in the plastic region under loading of an external force as well as in the elastic region. The apparatus comprises a load cell adapted for detecting thread torque, bearing torque, clamping torque and axial tension, nut tightening apparatus, apparatus for generating external force to be applied to the sample screw and an extensometer adapted for detecting twist angle and elongation of the bolt and revolution angle of the nut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.