Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent
1981-04-29
1982-09-28
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Machines
Brushing
15383, 15389, 51176, 173 12, A47L 526, A47L 1114
Patent
active
043510787
ABSTRACT:
A floor maintenance machine includes a machine housing, a treating tool mounted on the machine housing for positional adjustment toward and away from the surface to be treated as considered in the operative position of the machine, an electric motor having a housing and an output shaft, and a transmission interposed between the output shaft of the motor and the treating tool and operative for transmitting torque therebetween. The motor housing is mounted on the machine housing for angular displacement in a range delimited by abutments on these housings about the axis of the output shaft and carries an eccentrically situated pin which is received in a slot of an adjusting lever which is rigid with a frame on which the treating tool is mounted, so that the tool is lifted when the torque increases and lowered when the torque decreases. A section of the machine housing is transparent and markings provided on the periphery of the motor housing are visible therethrough. A latching member arrests the motor housing in its then assumed position when the torque exceeds a predetermined limit and switches off the supply of electric energy to the motor at the same time, until released by a releasing element. A centrifugally extendable control member on the motor housing abuts a stationary stop on the machine housing when the speed of angular displacement of the motor housing exceeds a predetermined limit.
REFERENCES:
patent: 3639941 (1972-02-01), Kirwan
patent: 3772727 (1973-11-01), Worwag
Roberts Edward L.
Striker Michael J.
Vorwerk & Co. Interholding GmbH
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