Vacuum pump
US9004891B2 · kind B2 · utility
1Cited by
9References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2008 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Apr 8, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S417/01
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pair of Northey rotors for a vacuum pump, in which each rotor comprises two opposing, substantially parallel faces, and a peripheral surface located between the opposing faces. In order to reduce damage caused by pumping a gas stream containing liquid or solid particulates, a plurality of grooves is located on the peripheral surface for accommodating the particulates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.