Multistage speed change gear system
US4291587A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1979 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Jul 6, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19479
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a multistage speed change gear system including a plurality of gears selectively interconnecting an input shaft and an output shaft located parallel to one another, the gears disposed concentric with the input shaft are supported by ball-and-roller bearings supported by at least one stationary member which is an entity separate from the input shaft. By this arrangement, relative movements occur between inner and outer races of the ball-and-roller bearings when a rotational force is transmitted from the input shaft to the output shaft, thereby preventing or reducing the development of fretting corrosion in the ball-and-roller bearings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.