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:
May. 12, 2009
Filed:
Dec. 09, 2004
Applicants:
Helmut Bacher, St. Florian, AT;
Helmuth Schulz, Linz, AT;
Georg Wendelin, Linz, AT;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 29/01 (2006.01); B01D 35/00 (2006.01); B01D 29/88 (2006.01);
U.S. Cl.
CPC ...
Abstract
A backwashable filtering device for thermoplastic plastics material is disclosed. The device can filter thermoplastic plastics material through one or more nests of screens in the filtering position, while submitting some nests of screens to the backwashing process that cleans them. The filtering position and the backwashing position are selectable by displacing one or more carrying bodies with respect to a housing and/or by displacing one or more control bodies with respect to the carrying bodies. The backwashing can be performed over an entire nest of screens or over a portion of a nest of screens. The nests of screens can be straight or curved.