Motor driven pumps
US5009578A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1987 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Oct 27, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/0416
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Motor driven pumps are provided of the canned, or isolated stator type which include a center shaft, rotating shaft support bearings, controlled cooling, and automatic thrust balancing construction, utilizing fixed orifices. A snubber is carried on the shaft at the shaft end opposite to the impeller. The snubber has an en surface which faces an end liner plate. Thrust balancing is achieved by axial movement of the shaft which permits fluid flow between the end liner plate and the snubber. A snubber is carried on the shaft at the shaft end opposite to the impeller. The snubber has an end surface which faces an end liner plate. Thrust balancing is achieved by axial movement of the shaft which permits fluid flow between the end liner plate and the snubber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.