Oil-sealed vane-type rotary vacuum pump with an oil pump
US6149414A · kind A · utility
2Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Jan 14, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C29/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention concerns an oil-sealed vane-type rotary vacuum pump (1) with a rotor (3) and an oil pump (45, 46) whose suction chamber is fitted with feeds (64, 65) for gas and oil. In order to simplify the supply of a gas/oil mixture to the vacuum pump, the invention proposes that the gas and oil feeds (64, 65) are disposed in such a way that initially only oil and subsequently both oil and air are aspirated into the volume swept by the oil pump (45, 46) as it rotates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.