Gas-operated liquid pump
US4181470A · kind A · utility
Inventor
Key dates
| Filing date | Nov 18, 1977 |
| Grant date | Jan 1, 1980 |
| Priority date | — |
| Expiry date | Nov 18, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04F1/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A gas-operated liquid pump which includes an outer, stationary compartment and an inner compartment movable between upper and lower positions in the outer compartment. The inner compartment has positive buoyancy in the liquid to be pumped. Valve means operated by movement of the inner container is provided to cause gas admitted to the inner container to displace liquid therefrom when the inner container is in its upper position, and to permit gas to escape from the inner compartment when the latter is in its lower position. The pump makes use of a continuous stream of compressed gas such as air to provide a pulsating flow of liquid. The pump is useful in aquariums to create water movement or to pump water to a filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.