Electrically-driven rotary vane pump
US4407641A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1981 |
| Grant date | Oct 4, 1983 |
| Priority date | — |
| Expiry date | Jul 21, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C29/021
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The pump comprises a pump stator (5), an electric motor stator (4), and a rotor (6) that constitutes the rotor both of the pump and of the electric motor. The pump stator comprises a tubular non-magnetic lining to the electric motor stator, and the rotor is mounted excentrically inside said tubular lining and is equipped with radially movable vanes (63) that co-operate with said lining to provide pumping action when the rotor rotates. The arrangement is particularly applicable to oil-sealed vacuum pumps, and has the advantage of being more compact than units of similar performance, but equipped with a pump and a motor that are separate and interconnected by a mechanical coupling, as is conventional practice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.