Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1987-11-06
1989-05-23
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
A47L 906
Patent
active
048316865
ABSTRACT:
A combined vacuum cleaning tool comprises two mutually movable parts, such as a flat surface nozzle (12) and a brush nozzle (10) which are alternatively adjustable between working and non-working positions, the flat surface nozzle being resiliently actuated to occupy its working position. An adjusting mechanism comprises control means (15) rotatably supported by the brush nozzle and cooperating with a means (18, 21) attached to the flat surface nozzle in order to move the brush nozzle into engagement with a working surface during a first phase and remove the flat surface nozzle from the working surface during a second phase. The adjusting mechanism comprises a contact surface (18a, 15f) having a curvature generally corresponding to the path of movement of the brush nozzle during said first phase, whereby during at least the major portion of this phase the adjustment takes place generally without rotational movement of the control means (15), and during said second phase said flat surface nozzle being removed from said working surface as a result of the rotational movement of said control means.
REFERENCES:
patent: 2597808 (1952-05-01), McQuilkin
patent: 3952363 (1976-04-01), Lindman
patent: 4073031 (1978-02-01), Schwartz
patent: 4351083 (1982-09-01), Simonsson
patent: 4360948 (1982-11-01), Simonsson
Aktiebologet Electrolux
Miller Alfred E.
Moore Chris K.
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