A - Human Necessities – 47 – L
Patent
A - Human Necessities
47
L
A47L 9/19 (2006.01) A47L 9/10 (2006.01)
Patent
CA 2619128
A floor care apparatus has a filter with an intake and out take. A first pressure sensor is arranged on the intake while a second pressure sensor is arranged on the out take. A controller connects to the sensors to receive signals indicative of relative pressure. Whenever a predetermined pressure differential between the signals is achieved, an undesirable load on the filter is deemed occurred and initiation of a self-cleaning of the filter begins. In this manner, filter cleaning only occurs on an as-needed basis and user intervention is avoided, thereby adding convenience. The controller is also able to ascertain a clogged airway condition. Various features contemplate pressure sensor signals arranged to scale suction as positive pressures, meeting the predetermined pressure differential at other than a maximum pressure differential between the first and second pressure sensors, and scaling the predetermined pressure differential relative to the maximum pressure differential.
Charbonneau Gary P.
Dever Kerry L.
Panasonic Corporation Of North America
Riches Mckenzie & Herbert Llp
LandOfFree
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