Suction nozzle height adjustment and control arrangement

Details Suction nozzle height adjustment and control arrangement Suction nozzle height adjustment and control arrangement

2007-04-17

2007-04-17

Till, Terrence R. (Department: 1744)

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

C015S354000

Reexamination Certificate

active

10746057

ABSTRACT:
A floor care appliance is provided with a microprocessor based control arrangement. The microprocessor adjust the height of the suction nozzle through a motorized suction nozzle height gear and cam arrangement. The microprocessor is programmed to turn the current off to either of the motor-fan assembly or the agitator drive motor when the current consumed by either exceeds a predetermined amount based upon the nozzle height. The height of the suction nozzle is selected by one or more switches located on the appliance handle. A separate switch is provided to select bare floor mode and the microprocessor is programmed to store the height of the suction nozzle prior to bare floor mode being selected. By pressing a the bare floor mode button again or the use of a sensor the suction nozzle is returned to the stored position when the suction nozzle is returned to the carpeted surface.

REFERENCES:
patent: 4754520 (1988-07-01), Steadings et al.
patent: 5056175 (1991-10-01), Stein et al.
patent: 6481515 (2002-11-01), Kirkpatrick et al.
patent: 2006/0000052 (2006-01-01), Budd

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