Motor controller for a dental handpiece
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United States of America Patent
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-
Nov 9, 1999
Grant Date -
N/A
app pub date -
Jul 19, 1996
filing date -
Jul 28, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motor controller for a dental handpiece comprising a torque detection means for detecting the load torque applied to a cutting tool, and a control means for stopping a cutting tool drive motor, reducing the rotation speed of the motor or temporarily reversing the motor when the detected load torque has reached a preset reference torque. With this controller, a cutting tool such as a relatively slender file for root canal formation can be prevented from breaking. In addition, the operability of the handpiece can be improved, and operation such as root canal formation can be conducted easily.
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