Pulse torque generator and power tool having the same

Details Pulse torque generator and power tool having the same Pulse torque generator and power tool having the same

2007-05-15

2007-05-15

Smith, Scott A. (Department: 3721)

Tool driving or impacting

Automatic control of power operated means

C173S093000, C173S117000, C192S021500, C081S473000, C310S023000

Reexamination Certificate

active

11319173

ABSTRACT:
A pulse torque generator utilizing a magnetic coupling, and an electric power tool provided with the pulse torque generator. The pulse torque generator includes an input shaft extending in its axial direction and having a hollow section providing a hollow space, and an output shaft rotatably provided in the hollow space. A magnetic fluid is encapsulated in a hollow space between the input shaft and output shaft. A magnetic field generating unit is disposed, and magnetic segments are provided in the input shaft. A magnetic fluid provides a magnetic fluid bridge bridging between the input shaft and the output shaft each time the magnetic segment is brought into confrontation with the magnetic field generating unit.

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