Float operated pneumatic pump
US5358037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1993 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Mar 29, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04F1/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A float operated pneumatic pump has an outer pump body forming an outer chamber and a dip tube forming an inner chamber therein. The inner chamber of the dip tube is in communication with the outer chamber of the pump body through a back flow discharge check valve. An inlet is located at a first end of the outer pump body for permitting liquids to enter both the inner and outer chambers. A discharge housing is located at a second end of the tubes and contains a liquid discharge port in communication with the second end of the dip tube. An air inlet port is located in the discharge housing for permitting pressurized air to enter the second end of the outer pump body. An air exhaust port is provided for permitting air in the outlet chamber to escape to atmosphere when fluid is entering the inner and outer chambers. A float is disposed on the outside of the dip tube within the outer chamber of the pump body. The float provides buoyancy to actuate the pump and provides weight to de-activate the pump. An inlet valve is disposed within the air inlet port for selectively admitting in a discharge mode, and blocking in a refill mode the source of compressed air into the outer chamber of the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.