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:
Aug. 23, 1983
Filed:
Sep. 07, 1981
Applicant:
Inventors:
Assignee:
Progress-Elektrogerate Mauz & Pfeiffer GmbH & Co., Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D / ; A47L / ; H02P / ;
U.S. Cl.
CPC ...
15319 ; 318644 ;
Abstract
A vacuum cleaner with constant air flow for household and industrial purposes. The vacuum cleaner includes a suction fan driven by an electric motor. An air flow measuring device is arranged in the working air flow of the suction fan, and has an electrical output signal proportional to the air flow. This electrical output signal is conveyed to a regulating and control circuit which adjusts the working air flow to a predetermined value as a function of the output signal.