Liquid purification or separation – Filter – With residue removing means or agitation of liquid
Patent
1985-05-28
1987-06-16
Fisher, Richard V.
Liquid purification or separation
Filter
With residue removing means or agitation of liquid
210415, 2104161, 55296, 209389, B01D 4104, B01D 2938
Patent
active
046735020
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.
REFERENCES:
patent: 3574509 (1971-04-01), Zentis et al.
patent: 3959140 (1976-05-01), Legras
patent: 4052305 (1977-10-01), Arvanitakis
patent: 4146484 (1979-03-01), Campbell
patent: 4273655 (1981-06-01), Reid
patent: 4297209 (1981-10-01), DeVisser et al.
patent: 4328103 (1982-05-01), Kraeling, Jr. et al.
patent: 4360037 (1982-11-01), Kendall
patent: 4396511 (1983-08-01), Neumann
patent: 4421645 (1983-12-01), Creps et al.
Barnes Drill Co.
Fisher Richard V.
Millard Wanda L.
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