Device for controlling the pressure in the bearings of a roots blower supercharger
US4709682A · kind A · utility
17Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1986 |
| Grant date | Dec 1, 1987 |
| Priority date | — |
| Expiry date | Nov 20, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C29/0021
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pressure controlling device for controlling pressure acting on end faces of bearings in a Roots blower type supercharger. An end portion of a shaft having an impeller projects through an inner wall of a housing of the supercharger, and is rotatably supported by a bearing provided outside of the inner wall. An annular space is formed the bearing and the inner wall. The annular space is communicated with the atmosphere through an air passage which is connected to a control valve. The control valve closes for a predetermined period after the engine load becomes higher than a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.