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Motor-driven rotary tool with internal heating temperature detecting function

  • US 7,063,171 B2
  • Filed: 01/22/2002
  • Issued: 06/20/2006
  • Est. Priority Date: 01/31/2001
  • Status: Expired due to Fees
First Claim
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1. A hand held motor-driven rotary tool, comprising:

  • an electric motor;

    a rotary tool driven by the motor;

    a housing for housing the motor and for gripping by an operator of the tool;

    a torque setting and automatic stopping device for detecting torque load applied to the rotary tool by engagement of the rotary tool with a workpiece and for stopping drive of the rotary tool when the torque load reaches a predetermined value; and

    a means for preventing injury to said operator of the rotary tool from low-temperature burn;

    said means comprising;

    a temperature sensor on the housing for sensing predetermined temperature of the housing, said temperature being within a range of 45°

    C. to 65°

    C.; and

    a power shutdown device operatively connected to the temperature sensor for shutting down power to said electric motor in response to sensing by the temperature sensor of a temperature of the housing within a predetermined range of 45°

    C. to 65°

    C.

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