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:
Feb. 11, 2003
Filed:
Sep. 27, 2001
Applicant:
Inventors:
Yongming Xia, Kingwood, TX (US);
James E. Thompson, The Woodlands, TX (US);
Jeffrey S. Devine, The Woodlands, TX (US);
Assignee:
Ashbrook Corporation, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D 2/446 ;
U.S. Cl.
CPC ...
B01D 2/446 ;
Abstract
An improved vertical filtration unit which includes an airlift and a washbox designed for more efficient washing of dirt particles from the filtration material. The washbox consists of a filter media shield, and a washbox skirt for washing of the filtration material. A throttling valve on the wash water discharge line regulates the overall cleaning rate of the unit. The filtered liquid is discharged via a riser pipe which feeds into a filtered liquid box before exiting the filtration unit.