Vacuum cleaner clogged condition indicator

Details Vacuum cleaner clogged condition indicator Vacuum cleaner clogged condition indicator

1974-06-03

1976-02-10

Aegerter, Richard E.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15319, 15327R, A47L 928

Patent

active

039369048

ABSTRACT:
A vacuum cleaner having an indicator for indicating an undesirable clogged condition of a dirt-collecting structure thereof. The indicator includes a control having a heater and a thermally responsive device responding to heat transferred from the heater to operate an observable indicator carried by the vacuum cleaner when a substantially clogged condition of the dirt-collecting means occurs. Operation of the indicator by the thermally responsive device is prevented as long as the dirt-collecting structure remains substantially unclogged as a result of the cooling action of air being flowed through the vacuum cleaner.

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