Multi-stage ejector pump
US6582199B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jun 4, 2001 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Jun 4, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04F5/467
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A multi-stage ejector pump having an ejector nozzle system with the nozzles situated coaxially behind each other and axially set apart from each other by a spaced distance. The ejector a nozzle system is made up of a set of individual nozzles and nozzle spacers. The ejector nozzle system can be sealingly pushed into a nozzle-receiving shaft of a housing element. The housing wall is interrupted in the area between adjacent nozzles to provide a fluid connection to suction chambers. Each individual nozzle is provided with support elements on its outer periphery. The support elements are axially set apart and provide tilt-free or low-tilt support in relation to the wall of the nozzle-receiving shaft. The aim of the invention is to provide a multi-stage ejector pump which has compact construction, interchangeable nozzles and a high degree of efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.