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Object-proximity monitoring and alarm system

  • US 7,009,522 B2
  • Filed: 08/16/2004
  • Issued: 03/07/2006
  • Est. Priority Date: 09/28/2001
  • Status: Expired due to Fees
First Claim
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1. A child-proximity monitoring and alarm system for use with a child seat securable within a vehicle, comprising:

  • a detector assembly including a sensor and a transmitter, wherein the sensor is adapted to determine whether the child seat is occupied and the transmitter is operable to transmit a first indication that the child seat is occupied responsive to input from the sensor;

    a base unit including a transceiver operable to receive the first indication that the child seat is occupied and, responsive thereto, to transmit a second proximity-sensitive indication that the child seat is occupied;

    a portable unit housing an alarm and a receiver operable to receive the second proximity-sensitive indication that the child seat is occupied and to activate the alarm if the portable unit is removed beyond a first predetermined proximity range of the transmitter while the child seat is occupied; and

    a plurality of satellite units each having a transceiver operable to communicate to the base unit whether they are within a predetermined accessory proximity range.

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