Vacuum cleaner with performance monitoring system

  • US 4,733,431 A
  • Filed: 12/09/1986
  • Issued: 03/29/1988
  • Est. Priority Date: 12/09/1986
  • Status: Expired due to Fees
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First Claim
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1. A vacuum cleaner condition indicator for use with a vacuum cleaner having a dust collecting compartment and a dust bag adapted to be disposed in said dust collecting compartment, comprisingdust bag sensing means for sensing the differential pressure between the inside of said dust bag and said dust collecting compartment to provide a first signal when said dust bag is properly disposed in said dust collecting compartment, and to provide a second signal when said dust bag is not properly disposed in said dust collecting compartments, andindicating means associated with said dust bag sensing means for providing sensorially perceptible indicating signals in response to said first and second signals.

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