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:
Sep. 29, 1998
Filed:
Jan. 15, 1997
Applicant:
Inventors:
Reinhold Hopfensperger, Magersdorf, DE;
Rudolf Tungl, Ergolding, DE;
Assignee:
Motoren Ventilatoren Landshut GmbH, Landshut, DE;
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
415206 ;
Abstract
An improved centrifugal fan whose air capacity is to be increased, without changing the dimensions of the casing and without using a higher-powered motor improves the fan by a) reducing the volume of the pressure space by enlarging the impeller diameter, b) shifting a location of a least distance between the impeller and the casing in the direction of rotation of the impeller, c) forming a wedge-shaped space ahead of the location of the least distance, and d) providing the impeller with very flat blades. The centrifugal fan has a higher air capacity at a lower rpm.