Battery powered pump
US4021150A · kind A · utility
14Cited by
11References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1975 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Jun 30, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/708
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Leakage of fluid is prevented by a negative pressure created in a motor-shaft bearing section by providing means for forcing fluid in the pumping chamber to flow in one direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.