Prestress-monitoring element for screw-type anchors
US5586851A · kind A · utility
9Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1995 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | May 19, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S116/34
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A prestress-monitoring element for screw-type anchors is arranged to be inserted like a washer between a nut and an article to be fixed and includes a pressure ring and an expansion ring. If the nut provided for fixing is tightened, then the resultant axial prestress causes the pressure ring to expand the expansion ring until the nut lies against the expansion ring. In this end position, a prestress required by the construction of the prestress-monitoring element is achieved. The position of the nut on the pressure ring can be monitored visually, as a result of which the prestress can be indirectly monitored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.