Closed loop speed control for a pneumatic dental handpiece

A - Human Necessities – 61 – C

Patent

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Details

A61C 1/00 (2006.01) A61C 1/18 (2006.01) F16L 37/413 (2006.01)

Patent

CA 2642268

A detection system for remotely determining the speed of a rotating tool tip in a pneumatic dental handpiece. A means for detecting the speed of the rotating tool tip monitors a periodic mechanical function at the pneumatic hose connected to the handpiece. The monitored periodic mechanical function serves to provide feedback that is used to control the speed of the rotating tool tip. The means for detecting the speed of the rotating tool detects a mechanical function of the rotating tool tip, which in transmitted to a controller. The controller in turn regulates the operation of an air supply valve in response to the detected mechanical function. The valve regulates the flow of air to the handpiece. By continuously adjusting the flow of air through the valve into the pneumatic hose, the speed of the rotating tool is maintained at the desired cutting speed.

La présente invention concerne un système de détection destiné à déterminer à distance la vitesse du bout d'un outil rotatif dans un appareil dentaire pneumatique. Un moyen de détection de la vitesse du bout de l'outil rotatif surveille une fonction mécanique périodique au niveau du flexible pneumatique raccordé à l'appareil. La fonction mécanique périodique surveillée sert à fournir un retour d'information qui est utilisé pour commander la vitesse du bout de l'outil rotatif. Le moyen de détection de la vitesse de l'outil rotatif détecte une fonction mécanique du bout de l'outil rotatif, qui est transmise vers un dispositif de commande. Le dispositif de commande régule ensuite le fonctionnement d'une soupape d'alimentation en air en réponse à la fonction mécanique détectée. La soupape régule le débit d'air vers l'appareil. En ajustant continuellement le débit d'air à travers la soupape vers le flexible mécanique, la vitesse de l'outil rotatif est maintenue à la vitesse de coupe souhaitée.

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