Rotor shaft with corrosion resistant ferrule for pumps motor
US4810918A · kind A · utility
7Cited by
12References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Oct 7, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A corrosion resistant ferrule secured to the end of a full carbon steel rotor shaft in order to reduce wear and corrosion of the sealing elements of the pump assembly, while enhancing the overall strength of the drive shaft. A threaded member is received in the end of the rotor shaft and ferrule in order to secure the pump impeller to the drive shaft. The corrosion resistant ferrule reduces manufacturing costs while allowing integral rotor shaft construction. The ferrule may be manufactured of stainless steel, plastic, or brass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.