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:
Apr. 04, 1978
Filed:
Jul. 02, 1976
Applicant:
Inventor:
Joseph Francis Schmitz, St. Paul, MN (US);
Assignee:
Whirlpool Corporation, Benton Harbor, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
415209 ; 415206 ; 4152 / ; 4174 / ;
Abstract
A vacuum cleaner apparatus having a fan housing defining a plurality of corner portions and a wall structure extending across the housing and defining with the housing corner portions flow restricting air flow passages for conducting air from the fan impeller through a discharge portion of the housing with improved efficiency. The housing may be polygonal in transverse cross section and the wall structure may have turned edge portions for suitably cooperating with the housing in directing the air from the fan through the air flow passages.