Electrically-driven rotary pump
US5039286A · kind A · utility
14Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1990 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Jul 2, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A centrifugal pump, intended for pumping liquids, includes a impeller (1) connected in rotation to a rotor (7) with a permanent magnet that is part of a synchronous motor. The rotor (7) which has an axial clearance (L) is accommodated in a cylindrical housing (10) that is part of the body (9) of stator (8) of the motor. To orient the drive direction (F) of rotor (7) on the starting of the pump, complementary configurations are provided on the front face of rotor (7) away from impeller (1) and at the bottom of housing (10). These configurations comprise helicoidal surfaces (14, 16) connected at their ends by notches (15, 17).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.