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Flight lock actuator with dual energy sources

  • US 7,137,595 B2
  • Filed: 09/09/2003
  • Issued: 11/21/2006
  • Est. Priority Date: 11/13/2001
  • Status: Expired due to Term
First Claim
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1. A method for providing improved reliability in an aircraft door flight lock actuator comprising:

  • storing energy provided to the actuator during a powered locking stroke of the actuator in a mechanical energy storage means;

    storing energy provided to the actuator, during a powered locking stroke of the actuator and while the actuator is in a state of powered stall in a locked position, in an electrical energy storage means;

    powering the actuator using the energy stored in the mechanical energy storage means to complete an unlocking stroke;

    powering the actuator using the energy stored in the electrical energy storage means to complete the unlocking stroke, in the event that the energy stored in the mechanical energy storage means does not successfully power the actuator to complete the unlocking stroke;

    controlling a linear velocity of the actuator; and

    controlling a current supplied to the actuator while the actuator is in said state of powered stall.

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