Roll filter metering arrangement
US4470833A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1982 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Dec 13, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D46/46
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A metering arrangement for limiting the advance of the filter media in an automatic roll filter having a timer which periodically energizes a drive motor adapted to draw the media through the filtering zone of the apparatus. The arrangement includes a metering reel which is adapted to rotate in direct proportion to the lineal advance of the filter media, a magnet mounted on the reel which generates a magnetic field limited to a predetermined arc of the periphery of the reel, and a reed switch which is actuated by the magnetic field to signal an electrical circuit to shut off the drive motor after a preselected increment of the filter media has been drawn into the filtering zone of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.