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. 15, 1994
Filed:
Oct. 29, 1992
Aktiebolaget Electrolux, , SE;
Abstract
A device for purifying water comprises a filter unit (10) containing an osmotic membrane and provided with an inlet (11), a filtrate outlet (12), a return conduit (14) for a recirculating large flow of unfiltered water and having an outlet (22) for a small flow of reject water, According to the invention, two ion exchange units (17, 18) are arranged in parallel and connected to the filter unit (10) in such way that raw water entering the device is first passed through one of said ion exchange units to be softened, and that the reject water is passed in the opposite direction through the other ion exchange unit to regenerate the same. Valve means (19, 24) are provided for alternately shifting the ion exchange units between the functions of softening and regeneration.