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. 25, 1989
Filed:
Mar. 18, 1988
Roy O Erickson, Jr, Cadillac, MI (US);
Rexair, Inc., Troy, MI (US);
Abstract
An improved blower assembly particularly useful for liquid bath type vacuum cleaners is disclosed. The improved blower assembly features enhanced noise attenuation achieved by providing a four-stage noise reduction system featureing a serpentine airflow path at the blower assembly air inlet and outlet. The four stages of the noise reduction system are comprised of: a noise reduction stage housing, a lower stage assembly, an upper stage assembly, and a motor base, respectively. Improvements in the production assembly techniques of the blower assembly components are further provided through a modified upper stage assembly which is assembled to a motor base component by a partial turn and lock procedure so that the components become firmly locked together and accurately positioned. This production technique can be accomplished quickly without a requirement of a high degree of operator skill.