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Lock portion with piezo-electric actuator and anti-tamper circuit

  • US 8,047,031 B2
  • Filed: 12/27/2007
  • Issued: 11/01/2011
  • Est. Priority Date: 12/27/2007
  • Status: Expired due to Fees
First Claim
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1. An electronic lock, comprising:

  • a piezo-electric actuator positioned in a plug of a rotatable core, wherein the piezo-electric actuator has a first position and a second position and is configured to resist movement of a locking member during a non-normal unlocking operation of the electronic lock, wherein the locking member is at least partially positioned within a recess of the plug, and the piezo-electric actuator is in the first position when the electronic lock is locked and in the second position when the electronic lock is unlocked; and

    tamper circuitry coupled with a connector of the piezo-electric actuator wherein the tamper circuitry is configured to resist an externally induced acceleration of the electronic lock by shunting electrical power produced by a resultant externally induced motion of the piezo-electric actuator back to the piezo-electric actuator such that the piezo-electric actuator bends toward the first position.

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