Electrically operated coolant pump
US6102674A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Sep 16, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2380/26
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to an electrically operated coolant pump with a rotor which is encompassed by a stator of the electromotor and comprises a rotor shaft with hollow design through which the liquid supply to the impeller is made, with the stator being arranged in a stator chamber of the motor housing and the rotor shaft being rotationally held in the motor housing, with the bearing of the rotor shaft being effected by way of roller bearings. In order to increase the efficiency and reduce the wear and tear of the bearings, it is proposed that at least one roller bearing is arranged as a leakproof roller bearing and sealing elements are integrated in the roller bearing cages, and that the stator chamber which is separated in a leakproof manner from the conveying liquid is provided with a dry design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.