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Locking device for vehicles

  • US 4,926,332 A
  • Filed: 11/15/1988
  • Issued: 05/15/1990
  • Est. Priority Date: 07/22/1985
  • Status: Expired due to Fees
First Claim
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1. A lock device for a vehicle comprising:

  • lock instruction means for selectively generating and transmitting a command to lock or unlock the lock device, said lock instruction means including register means for storing a base code and an update code, each of said base code and said update code identifying said lock instruction means, said lock instruction means for transmitting said command including a transmitter identification portion corresponding to said update code;

    lock control means for storing a reference code and for establishing a locked state for the lock device in response to said reference code being equal to said transmitted transmitter identification portion and said command being to lock the lock device and an unlock state in response to said reference code being equal to said transmitted transmitter identification portion and said command being to unlock the lock device;

    code changing transmission means responsive to said reference code being equal to said transmitted transmitter identification portion for transmitting to said lock instruction means information for modifying the transmitter identification portion and for modifying said reference code in accordance with said modifying information; and

    code update means in said lock instruction means, responsive to said modifying information, for storing a modified transmitter identification portion as said update code in said update code register.

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