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Dual mode portable suction cleaner

  • US 6,448,732 B1
  • Filed: 08/10/2000
  • Issued: 09/10/2002
  • Est. Priority Date: 08/10/1999
  • Status: Expired due to Fees
First Claim
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1. A vacuum cleaner comprising:

  • a motor;

    an AC supply input;

    a DC supply input;

    a switch that selectively couples either the AC or DC input to said motor to thereby deliver power to said motor; and

    a control adapted for operating said motor from at least two different rated batteries connected with said DC supply input, said control monitoring the voltage at said DC input when said switch has electrically coupled said DC input to said motor, said control terminating power to the motor when the voltage at said DC input falls beneath a threshold level, said control establishing said threshold as a function of which rated battery is connected to said DC input.

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