Reversed leaf spring energizing system for wellbore caliper arms
US5092056A · kind A · utility
50Cited by
12References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1989 |
| Grant date | Mar 3, 1992 |
| Priority date | — |
| Expiry date | Sep 8, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A caliper tool mechanism is set forth. In the preferred and illustrated embodiment, a pair of opposing caliper arms are pivotally mounted on a elongate body and are recessed in elongate slots in said body. The caliper arms are retracted to a parallel position. The arms extend parallel to the elongate body and cover an elongate leaf spring. The spring has a fastened lower end affixed to the lower end of the body, and upper ends joined through moveable lengths to said caliper arms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.