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:
Mar. 11, 2014
Filed:
Dec. 07, 2009
Norbert Weisser, Niedereschach-Kappel, DE;
Marcel Paffendorf, Zimmern ob Rottwer, DE;
Wolfgang Laufer, Aichhalden, DE;
Jürgen Herr, St. Georgen, DE;
Stefan Mayer, Brigachtal, DE;
Norbert Weisser, Niedereschach-Kappel, DE;
Marcel Paffendorf, Zimmern ob Rottwer, DE;
Wolfgang Laufer, Aichhalden, DE;
Jürgen Herr, St. Georgen, DE;
Stefan Mayer, Brigachtal, DE;
EBM-PAPST St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
A fan () has a fan housing (). The latter has an air entrance opening () and an air exit opening (). It further has a swivel joint arrangement () having at least one swivel joint () that is arranged on a joint carrier (); at least one non-return flap () that is journaled rotatably by means of the at least one swivel joint () and, in its closed position, at least partly closes off the air exit opening (); and at least one elastic return member () that is associated with the at least one non-return flap () and urges it toward its closed position.