Gas ballast system for a multi-stage positive displacement pump
US6071085A · kind A · utility
5Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1999 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Jul 12, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2220/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A gas ballast system for a multi-stage positive displacement pump in which a first stage includes at least one positive displacement pump stage, is equipped with an inlet valve and an outlet valve, and is connected with the following stage by an intermediate vacuum chamber, with the gas ballast system including a first conduit for supplying gas into the intermediate vacuum chamber, and a second conduit for supplying gas from the intermediate vacuum chamber into a pump chamber of the first stage or to a suction region of the first stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.