The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1999
Filed:
Jul. 19, 1996
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Morita Seisakusho, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61C / ;
U.S. Cl.
CPC ...
433 27 ; 433131 ;
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.
Published as: