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:
May. 17, 1994
Filed:
Aug. 21, 1992
Applicant:
Inventor:
Robert S Holland, Georgetown, CT (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L / ;
U.S. Cl.
CPC ...
15353 ; 15314 ; 15413 ; 154222 ; 4174238 ; 4174235 ;
Abstract
A dry vacuum apparatus for a dental operatory features an in-line configuration wherein a power unit subassembly is directly mounted upon a collection tank with a pair of brushless DC vacuum motor fan units in axially aligned, vertically stacked reverse relation with air inlets of the motors confronting one another and with a vacuum air outlet of one blower connected in series relation to a vacuum air inlet of the other blower, an air cooling circuit being provided for supplying cooling air to a common sealed plenum chamber servicing the confronting motor air inlets and also to the vacuum air inlets of the blowers.