Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1989-08-14
1990-12-18
Recla, Henry J.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15339, A47L 928
Patent
active
049776398
ABSTRACT:
A floor detector for a power brush of a vacuum cleaner comprises a lift sensor S1 and a floor sensor S2. The lift sensor S1 has a movable member which yieldably displaces when the power brush is placed on a relatively soft floor while the floor sensor S2 has a movable member which yieldably displaces when the power brush is placed on a relatively hard floor. Each of movable members is detected its movement by a corresponding light sensor which provides a signal representative of the movements. The signals from the light sensors are sent to a control circuit which controls a drive source for driving the brush member of the power brush. In this manner, the brush member is rotated when the power brush is placed on a relatively soft floor such as a carpeted floor and is not rotated when the power brush is placed on a relatively hard, flat, smooth floor.
REFERENCES:
patent: 4342132 (1982-08-01), Fromknecht
patent: 4654924 (1987-04-01), Getz et al.
patent: 4754520 (1988-07-01), Steadings et al.
Imai Tomohisa
Noguchi Yoshihiro
Takahashi Yutaka
Yanagida Takahiro
Fetsuga Robert M.
Mitsubishi Denki & Kabushiki Kaisha
Mitsubishi Electric Home Appliance Co., Ltd.
Recla Henry J.
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