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. 04, 2008
Filed:
Jul. 03, 2001
Applicant:
Peter Nøhr Larsen, Copenhagen NV, DK;
Inventor:
Peter Nøhr Larsen, Copenhagen NV, DK;
Assignee:
Nilfisk-Advance A/S, , DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 1/02 (2006.01); H02K 5/24 (2006.01); F01N 3/02 (2006.01); F01N 1/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A suction apparatus is provided with noise reduction means in one or more airflow passages for reducing noise emission from an airflow generator or the like, wherein at least one airflow passage is provided with at least one indentation with a predetermined depth extending substantially perpendicularly to the general direction of the noise in the passage.