Vacuum cleaner with operating condition indicator system

  • US 4,733,430 A
  • Filed: 12/09/1986
  • Issued: 03/29/1988
  • Est. Priority Date: 12/09/1986
  • Status: Expired due to Term
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First Claim
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1. A vacuum cleaner system condition indicator for use with a vacuum cleaner having an intake port, a dust collecting compartment, a dust bag in said compartment and a discharge port, comprisingfirst sensing means for sensing a first pressure differential between said intake port and said dust collecting compartment, said first sensing means providing a first sensing signal when said sensed first pressure differential is of at least a first magnitude,second sensing means for sensing a second pressure differential between said discharge port and said dust collecting compartment, said second sensing means providing a second sensing signal when said sensed second pressure differential is of a least a second magnitude, andindicator means associated with said first and second sensing means for providing sensorially perceptible indicating signals in response to said first and second sensing signals.

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