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. 10, 2012
Filed:
Jul. 11, 2007
Applicant:
Chuan Hui Fang, Hong Kong, CN;
Inventor:
Chuan Hui Fang, Hong Kong, CN;
Assignee:
Johnson Electric S.A., La Chaux-de-Fonds, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 39/02 (2006.01); F04B 39/06 (2006.01); F03B 1/00 (2006.01); F03B 11/02 (2006.01); F03D 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A blower for a vacuum cleaner has a diffuser with an increased efficiency by coupling the attack angle A of the diffuser vanes with the attack angle B of the return guide vanes where angle A is between 4° and 6° and angle B is between 6° and 20°.