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:
Jan. 07, 2003
Filed:
Apr. 23, 2001
Applicant:
Inventor:
Rolf Fuesser, Bad Herrenalb, DE;
Assignee:
Filterwerk Mann & Hummel GmbH, Ludwigsburg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 4/610 ;
U.S. Cl.
CPC ...
B01D 4/610 ;
Abstract
An enclosure for an air aspirating machine, such as a compressor for a fuel cell drive , which represents a closed volume, so that said volume can be used acoustically for the air that is being drawn in. An air intake is extended into the enclosure , which is made of a sound damping and absorbing material , so that the resonant cavity acts as a series resonator. The air is drawn in via an air inlet of the compressor . Alternatively, the resonant cavity can also be used as a parallel resonator in that the intake path for the air is sealed within the enclosure and is provided only with sound communicating openings to the resonant cavity.