1
Niklaus Hug: Removable dust collecting container for professional and household vacuum cleaners. Rommag P Worwag & Co, Becker & Becker, June 30, 1981: US04276070 (34 worldwide citation)

A removable dust collecting container for professional and household vacuum cleaners. The container is closed with a dust filter embodied as a cover, whereby between the dust collecting container and the cover-like filter, a soft-elastic seal is arranged. The filter is embodied in a frame configurat ...


2
Niklaus Hug: Vacuum cleaner. Rommag P Worwag & Co, Becker & Becker, July 14, 1981: US04278456 (8 worldwide citation)

A vacuum cleaner includes a receiving chamber and a removable dust collecting container. The dust collecting container has a guide groove on that outer surface facing the inlet flow connection of the vacuum cleaner, and this guide groove is adapted or matched to the discharge opening of the inlet fl ...


3
Niklaus Hug: Vacuum cleaner for professional and household purposes. Rommag P Worwag & Co, Becker & Becker, November 10, 1981: US04299007 (7 worldwide citation)

A vacuum cleaner for professional and household purposes, with actuating elements for introducing the individual apparatus functions, including, for instance, turning the blower motor on and off, rewinding the power supply line into the housing interior, and changing the suction capacity. The actuat ...


4

5

6

7