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:
Dec. 06, 1983
Filed:
Dec. 07, 1981
Applicant:
Inventor:
Ernest J Fischer, Skokie, IL (US);
Assignee:
Breuer Electric Mfg. Co., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L / ;
U.S. Cl.
CPC ...
15326 ; 55276 ; 55379 ; 181231 ; 181250 ; 417312 ;
Abstract
A noise suppressor for vacuum cleaners is characterized by a muffler formed of a succession of tubes of different cross sectional areas and lengths. The muffler defines a low pass acoustic filter, and is connected in line with an exhaust outlet from the vacuum cleaner. Preferably, the muffler is used in place of a sleeve conventionally found in a filter bag for the vacuum cleaner, and thereby acts as a stand pipe to maintain the inlet to the filter bag above collected debris so that the inlet is not choked off with debris before the bag is filled.