Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1988-01-11
1988-08-30
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
55374, 55DIG34, A47L 914
Patent
active
047666390
ABSTRACT:
In a vacuum cleaner having a disposable dust bag of the kind comprising an attachment plate of cardboard or the like, and a cover adapted to be opened for the replacement of the dust bag, a blocking device is provided which is adapted to prevent closing of the cover when the dust bag is missing. The blocking device includes a slide actuated by a spring to be moved to a first position in which the closing of the cover is prevented, and a toggle-joint mechanism adapted to be actuated by the attachment plate to move the slide to a second position for permitting closing of the cover.
REFERENCES:
patent: 2322948 (1943-06-01), Lofgren
patent: 2742105 (1956-04-01), Dow
patent: 4001912 (1977-01-01), Eriksson
patent: 4044421 (1977-08-01), Kristenson et al.
Francke Kurt O.
Hedin Ann-Christine
Lindquist Nils T.
Vukotic Milos
Aktiebolaget Electrolux
Miller Alfred E.
Moore Chris K.
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