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:
Aug. 31, 1999
Filed:
Apr. 21, 1998
Philip M Rolchigo, Warren, NJ (US);
Leonard T Hodgins, Closter, NJ (US);
Membrex, Inc., Fairfield, NJ (US);
Abstract
Rotary filtration devices and processes are disclosed. The devices have at least one inner member and at least one outer member, one or both of which rotate so that they rotate with respect to one another and which define a fluid filtration gap therebetween. There are one or more filters facing the fluid filtration gap and which are located either on the inner member or on the outer member or on both. During the filtration process, permeate passes from the feed fluid in the fluid filtration gap through the one or more filters. The inner member has an internal pathway for the flow of feed fluid. Fluid from the body of fluid to be filtered flows from the body of feed fluid to be filtered through the internal pathway, reverses direction, and then flows through the fluid filtration gap back to the body of feed fluid. Alternatively, fluid from the body of fluid to be filtered passes from the body of feed fluid to be filtered through the fluid filtration gap, reverses direction, and then flows through the internal pathway back to the body of feed fluid. The outer member may be closed so that feed fluid keeps circulating in the fluid filtration gap until it leaves through the filter as permeate or reenters the surrounding reservoir of feed fluid via, for example, a pressure control valve that relieves any overpressure condition in the fluid filtration gap.