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:
Nov. 25, 1986
Filed:
Jan. 22, 1985
Brent C Black, Salt Lake City, UT (US);
Bruce D Bradley, Salt Lake City, UT (US);
Ralph B Haymore, Salt Lake City, UT (US);
Envirotech Corporation, Menlo Park, CA (US);
Abstract
Apparatus for backwashing the filter media of a liquid filtering machine while at the same time enabling the machine to filter liquid. The machine is of the type having a tank and a continuous bed of granular filter media in the tank through which liquid having suspended solids therein for removing the solids. The apparatus comprises a partitioning chamber and a carriage for selectively supporting and conveying the chamber above the media bed, with the chamber being insertable into the bed to isolate a portion thereof from the remainder of the bed. The apparatus further comprises a mechanism to selectively allow insertion of the chamber into the bed and to remove it, and a pump to draw liquid through the isolated portion of the bed to backwash it, while filtration may proceed in the remainder of the bed. Apparatus for removing the media from the chamber and replacing it with new, cleaned or regenerated media is also disclosed.