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Application filed by Malchus Johannes Andries ChrisfiledCriticalMalchus Johannes Andries Chris
Publication of CH254222ApublicationCriticalpatent/CH254222A/de
A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
A47L9/19—Means for monitoring filtering operation
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
Filters For Electric Vacuum Cleaners
(AREA)
CH254222D1943-03-251946-07-12Staubsauger mit Signalvorrichtung.
CH254222A
(de)