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METHOD AND DEVICE FOR CONTROLLING USE OF POWER TOOLS

  • US 20090273436A1
  • Filed: 05/05/2008
  • Published: 11/05/2009
  • Est. Priority Date: 05/05/2008
  • Status: Abandoned Application
First Claim
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1. A method for blocking the unauthorized use of electrically powered tools while allowing authorized use, the method comprising the steps of:

  • a) providing a circuit-interrupting device in an electrical power circuit between the tool and an electrical power source for powering the tool, with the circuit-interrupting device being configured to be in a normally circuit interrupted condition with an open relay in the electrical power circuit between the tool and the electrical power source;

    b) connecting an activation signal receiving device to the circuit-interrupting device such that an activation signal from a remote activation signal transmitting device is wirelessly received by the activation signal receiving device and relayed to the circuit-interrupting device which is configured to close the relay, upon receiving the signal, to complete an electrical power circuit to the tool, thereby permitting the tool to be power activated;

    c) configuring an activation signal transmitting device, remote from the activation signal receiving device, to transmit a wireless signal, while in proximity with the receiving device, which signal is received by the receiving device and transmitted to the circuit interrupting device to cause the circuit interrupting device to close the relay and provide operating power to the tool; and

    d) configuring at least one of the circuit-interrupting device and activation signal transmitting device to deactivate the power tool after use thereof by one of;

    i) preventing an activation signal from reaching the signal receiving device to thereby cause the circuit-interrupting device to resume its normally circuit interrupting condition by opening the relay;

    ii) providing a deactivation signal to the signal receiving device to cause the circuit-interrupting device to resume its normally circuit interrupting condition by opening the relay; and

    iii) preventing operating current from reaching the tool with the circuit interrupting device being configured to detect such prevention and resume its normally circuit interrupting condition by opening the relay.

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