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. 21, 1999
Filed:
Nov. 14, 1997
Aaron J Potts, Carrollton, OH (US);
Jerome G Kitska, Akron, OH (US);
David B Finley, Alliance, OH (US);
Overhead Door Corporation, Dallas, TX (US);
Abstract
Vacuum cleaning apparatus, particularly adapted for wet/dry cleaning operations includes a powerhead housing assembly formed by an impeller housing for supporting an electric motor which drives a working air impeller and a motor cooling air fan and a cover member removably secured to the impeller housing. The impeller housing and the cover member define flow passages and chambers for diffusing and expanding working air flow to reduce noise emissions therefrom and for directing motor cooling air through the housing assembly without mixing with working air flow and while minimizing the ingestion of working air into the motor cooling air flowpath. An alternate embodiment of the housing assembly includes separable, opposed impeller housing members and a shroud member, all secured together by common fasteners and cooperating to form the working air diffusing and expansion chambers together with the cooling air flow passages. Inlet and discharge ports in the air positioned to provide for minimizing ingestion of exhausted working air into cooling air intake ports.