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:
Jun. 12, 1979
Filed:
Feb. 02, 1978
Applicant:
Inventor:
Dirk G Kronsbein, Dusseldorf, DE;
Assignee:
Ultrafilter GmbH, Dusseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
210489 ; 55482 ; 55485 ; 55487 ; 210492 ; 210503 ;
Abstract
A filter element for filtering air, other gases and liquids comprises two permeable supporting shells arranged one within the other, and a filter medium filling the space between the shells. The filter medium is formed by a plurality of layers of different filter gauge. The finest filter layer is covered by a coarser filter layer at least on its side which is, in use, towards the inlet for the fluid to be filtered. Preferably the filter medium includes three layers, the middle layer of which is the finest filter consisting of binder-free microfiber fleece and the other two layers are similar coarser filters consisting of binder-free supporting fiber fleece.