Portable purification container with cumulative use indicator
US6565743B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2000 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Aug 31, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2307/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A portable liquid filtration system includes a container 22 having a filtering assembly 30 therein and an arrangement for indicating the number of times that the cap has been fitted to the container in order to determine the remaining useful life of the filter. The indicator includes a clutch plate 50 having downwardly extending projections that mate with a plurality of upwardly extending projections on the filtering assembly top 34. The cap includes a vent and may include an arrangement to ensure that the filter is positioned correctly therein. Preferably, the indicator releases the filtering assembly after a predetermined number of uses that approximates the life of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.