Title:
MOTOR-DRIVEN ROTARY TOOL WITH INTERNAL HEATING TEMPERATURE DETECTING FUNCTION
Document Type and Number:
WIPO Patent Application WO/2002/060651
Kind Code:
A1
Abstract:
A motor-driven rotary tool with internal heating temperature detecting function capable of conveniently and easily preventing a damage such as low temperature burn from being applied to an operator by the heating of an electric motor incorporated in the holding part the motor-driven rotary tool, comprising the electric motor (12) incorporated in the holding part thereof for performing operations such as screw tightening by driving a rotary tool such as a screwdriver bit by the driving of the electric motor, a torque setting and automatically stopping means for detecting a load torque generated in the rotary tool after the specified operations are completed and stopping the driving of the rotary tool when the load torque reaches a preset torque value, a temperature sensor (20) installed in the casing of the electric motor (12) incorporated in the holding part, and a power shutdown means (25) for detecting the heated state of the casing with the temperature sensor when the temperature of the casing is increased to 55 to 75° C or higher by the heating of the electric motor and stopping the driving of the electric motor.
Inventors:
TOTSU KATSUYUKI (JP)
Application Number:
PCT/JP2002/000409
Publication Date:
August 08, 2002
Filing Date:
January 22, 2002
Export Citation:
Assignee:
TOTSU KATSUYUKI (JP)
International Classes:
B25B21/00; B25B23/14; B25B23/147; B25F5/00; (IPC1-7): B25B23/14; B25B21/00
Foreign References:
| JPH08192370A | 1996-07-30 | |||
| US5563482A | 1996-10-08 | |||
| US4306264A | 1981-12-15 |
Attorney, Agent or Firm:
Honda, Takashi (8Fe 1-17 Akasaka 1-chome Minato-ku, Tokyo, JP)
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