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. 01, 1993
Filed:
May. 13, 1992
Applicant:
Inventors:
Heinz Weiland, Waldenburg, DE;
Helmut Fuchs, Schonbuch, DE;
Ulrich Ackermann, Schonbuch, DE;
Andreas Jacobs, Aschendorf, DE;
Joachim Mohr, Pforzheim, DE;
Assignee:
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
415119 ; 415914 ;
Abstract
An axial fan has an impeller provided with vanes and mounted in a flow duct. In or on the wall of the duct at least one port is arranged adjacent to the vane tips. The duct side the port is provided with a covering means having passages therethrough.