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Automatic air freshener with dynamically variable dispensing interval

  • US 6,644,507 B2
  • Filed: 03/14/2002
  • Issued: 11/11/2003
  • Est. Priority Date: 03/14/2001
  • Status: Expired due to Term
First Claim
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1. An apparatus for periodically activating a control valve on a canister to discharge a quantity of the contents of the canister into a room, the apparatus comprising:

  • an actuator which engages the canister to open the control valve;

    a sensor which senses a characteristic of the room and produces a signal indicating that characteristic;

    an input device which designates a dispense interval at which the contents of the canister are to be discharged into a room; and

    a controller connected to the sensor, the device and the actuator, and evaluating the signal from the sensor to determine whether the room is being used, the controller periodically activates the actuator at intervals which correspond to the dispense interval when a determination is made that the room is being used, and when a determination is made that the room is not being used the controller periodically activates the actuator at intervals which are longer than the dispense interval.

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