Pumping apparatus comprising two collapsible chambers
US4158530A · kind A · utility
123Cited by
8References
14Claims
0Family size
Inventor
Key dates
| Filing date | Apr 5, 1976 |
| Grant date | Jun 19, 1979 |
| Priority date | — |
| Expiry date | Apr 5, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/1133
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump having two collapsible pumping chambers connected in series is coupled to a pump drive mechanism which opens and closes each chamber in a sequence that produces pumping action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.