Spring-loaded bearings for in-hole motors
US3982797A · kind A · utility
12Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1975 |
| Grant date | Sep 28, 1976 |
| Priority date | — |
| Expiry date | Jul 11, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2352/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention relates to spring-loaded thrust bearings for shafts subject to a plurality of levels of thrust loads and in its preferred embodiment is applied to in-hole motors. The invention employs a plurality of spring systems, whereby the thrust load on one set of springs is limited to one level of thrust and another of the spring systems under said load may be loaded to a higher level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.