The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 1990
Filed:
Jan. 27, 1989
Dennis A Brunsell, Arlington, WI (US);
John M Ehle, Madison, WI (US);
Other;
Abstract
A rotating filter apparatus (10) has a stack of porous filter disks (22) attached to a vertical, rotatable hollow shaft (24) and located within a chamber (32), the shaft (24) having a plurality of openings (26) therein to the hollow bore of the shaft (24). Unfiltered fluid is introduced to the chamber (32) under pressure in a tangential entry port (34) in the same direction as disk (22) rotation. Clarified fluid passes through the disks (22) to form a filtrate that flows down the shaft (24), while the unfiltered fluid and the solid particles, or sludge, descend in the chamber (32) to a tapered section (18). Non-fluid transfer and fluid transfer seal assemblies (14, 20) comprise bearings (54, 102, 108), seals, and associated parts upon which the shaft is properly aligned, balanced, and centered. The seal assemblies (14, 20) include seals positioned about the shaft (24) to form a boundary that isolates the bearings (54, 102, 108) from the unfiltered fluid or filtrate. A seal seal coolant is circulated within the non-fluid and fluid transmitting seal assemblies (14, 20) against the seals on the side of boundary opposing the unfiltered fluid, and the pressure of the coolant is maintained above that of the pressure of the fluid in the chamber (32) to prevent transfer of unfiltered fluid across the seal faces at any time. The drive shaft (24) has a coupling (190) which has a male (192) and female (194) interlock for ease of assembly. The tapered section (18) incorporates baffles (196, 198, 199) which promote settling of the sludge in the tapered section (18).