Patent ID: 9364295
Filing Date: 2016-06-14
CPC Classification: A61C,B23B,Y10T

Claim Text:
1. A clamping device for a dental tool in a dental turbine handpiece having at least one clamping lever that can be deflected about a virtual fulcrum and that extends along a longitudinal axis of a tool shank to be clamped, wherein the at least one clamping lever is designed and arranged such that the tool shank can be clamped using the at least one clamping lever and that on rotation of the clamping device about the longitudinal axis, through the effect of a centrifugal force, the at least one clamping lever is radially deflected about the virtual fulcrum so as to increase the clamping force acting on the tool shank, and wherein the at least one clamping lever forms part of a collet that has a plurality of clamping levers disposed about the longitudinal axis of the tool shank to be clamped; a spreading element for maintaining the clamping force of the at least one clamping lever even when the centrifugal force is decreased; a push button for applying an external force to the collet; and a housing in which the collet is supported so as to translate in an axial direction when subject to the external force.