Patent · US Expired

Vacuum cleaner with constant air flow

US4399585A · kind A · utility

23Cited by

0References

14Claims

0Family size

Assignee

Progress-Elektrogeraete Mauz & Pfeiffer GmbH · DE

Inventors

Gunter Kullik · Meinerzhagen, DE
Werner Durr · Leonberg, DE
Robert Maier · Babenhausen, DE

Key dates

Filing date	Sep 7, 1981
Grant date	Aug 23, 1983
Priority date	—
Expiry date	Sep 7, 2001

Classification

Technology area (CPC G)Physics
CPC primaryG05D7/0688
WIPO fieldFurniture, games
WIPO sectorOther fields

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.