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:
Oct. 08, 2002
Filed:
May. 19, 2000
Chang-Wei Jen, Bedminster, NJ (US);
Filtration Solutions, Inc., Hackettstown, NJ (US);
Abstract
A filter unit includes a cross-flow filtration assembly. The cross-flow filtration assembly includes an elongate cylindrical filter housing having an interior cylindrical wall defining an elongate filter cavity. The filtration assembly also includes a tangential feed inlet in fluid communication with the filter cavity extending substantially tangential to the interior cylindrical wall and an opposed retentate outlet port in fluid communication with the filter cavity. An elongate cylindrical filter cartridge supported in the filter housing includes an elongate porous cylindrical filter wall having an elongate cylindrical outer filter surface and an elongate inner filter surface defining a permeate passageway. One end of the filter cartridge defines a permeate outlet port in fluid communication with the permeate passageway and the opposite end of the cartridge is closed by a non-porous filter cap. A spiral fluid guide spans between the interior cylindrical wall of the filter housing and the outer filter surface of the cartridge to define a spiral fluid passageway extending between the feed inlet and retentate outlet ports. The spiral fluid passageway may be of dimension to impart secondary flow currents, particularly Dean-Flow currents, to fluid flowing therethrough to prevent particulate build-up on the filter media so as to better maintain permeate flow rate from the filter.