Device for determining when a threaded tube joint with screw limiting stop is properly made up
US4791816A · kind A · utility
9Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1987 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Aug 27, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49766
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A device for determining when a threaded joint for steel tubes having a male element (1) with external threads (3) with a screw limiting stop (5), and a female element (2) with corresponding internal threads (4) and a corresponding screw limiting stop (6) is properly made up is provided. The device comprises a strain gauge (12) and means (10, 11) for applying said gauge on the external surface of the female element (2) such that the gauge can measure superficial deformations of the female element (2) in the longitudinal direction along one of the generatrix of the female element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.