Environmentally safe pump including seal
US5499902A · kind A · utility
91Cited by
38References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 17, 1995 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Jan 17, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/09
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A motor driven environmentally safe pump includes a sealed motor housing (22) sealingly affixed to a sealed pump housing. The pump housing defines a fluid pumping chamber (43) in which is a fluid pumping impeller (46). A triplex rotating seal (31) is disposed rearward of impeller (46) within an annular fluid chamber (87) so as to prevent the fluid being pumped via the impeller (46) from leaking along the shaft (23) toward the motor (21). A piston seal (32) is provided adjacent a second fluid chamber (204), the piston seal also for preventing fluid from leaking into the motor housing and damaging the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.