Compact water filtration pump
US5534145A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1994 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Aug 15, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2201/006
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A portable, manually-operated water filtration pump for purifying water. The pump includes an inexpensive, disposable filter cartridge which can be easily changed when the filter elements are no longer effective. The pump uses a lever to actuate a double-acting piston. The lever is collapsible to one side of the pump for compact storage. The filter cartridge is a tubular cylinder having an inner bore forming the pump cylinder. A cylindrical mechanical filter is concentric with and adjacent to the inner bore to filter out particulates larger than 0.3 microns. A fluidized granual activated carbon filter surrounds the mechanical filter to absorb halogen and halogen-related compounds such as herbicides and pesticides. The pump pumps filtered water into a bottle adaptor which will fit most standard water containers. A prefilter is provided to screen out large particulates from the pump to enhance the life of the filter elements. The prefilter is shaped such that it will sink in water sources and to keep the prefilter inlet substantially upright in still water and tilted from horizontal in moving water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.