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. 22, 2019
Filed:
Feb. 12, 2016
Applicant:
Johnson Electric S.a., Murten, CH;
Inventors:
Assignee:
JOHNSON ELECTRIC S.A., Murten, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/66 (2006.01); F04D 29/54 (2006.01); F04D 29/32 (2006.01); F04D 17/16 (2006.01); F04D 25/06 (2006.01);
U.S. Cl.
CPC ...
F04D 29/665 (2013.01); F04D 17/165 (2013.01); F04D 25/0606 (2013.01); F04D 29/325 (2013.01); F04D 29/542 (2013.01);
Abstract
A noise reduction diffuser for an electric blower has a motor holder and a rear cover fitted to the motor holder. The motor holder includes a sidewall and a bottom portion at one end of the sidewall. The other end of the sidewall has an opening for mounting an electric motor inside the sidewall. An output shaft of the motor extends through the bottom portion for driving a fan. The motor holder and the rear cover form a Helmholtz resonance cavity.