Fixed filter drum and movable scraper
US4673502A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | May 28, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A drum with a wedge-wire filter screen is submerged in a dirty coolant tank and filters machine tool coolant when vacuum is applied to the inside of the drum by means of a suction line at one end of the drum. The vacuum draws the coolant through the screen and into the inside of the drum for discharge through the suction line. During the filtering process, a filter cake builds up on the outside of the screen and must be periodically removed therefrom. To remove the filter cake while enabling the use of a simplified sealing structure between the drum and the suction line, the drum is supported in a rotationally stationary position, a scraper is supported to rotate around the drum, and the scraper is intermittently indexed to shave filter cake from the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.