Patent ID: 8961177
Filing Date: 2015-02-24
Classification: A61B,A61C

Abstract:
1. A medical or dental handpiece, comprising: an outer sleeve, a tool-holding sleeve for holding a treatment tool, the tool-holding sleeve being arranged in the outer sleeve, wherein the tool-holding sleeve comprises a central axis about which the tool-holding sleeve can be rotated and wherein the tool-holding sleeve can be induced to a stroke motion by a driveshaft of the handpiece, and an adjusting device, which is configured to secure the tool-holding sleeve selectively in a rotational position or to allow a free rotatability of the tool-holding sleeve, wherein the adjusting device comprises a fixation element, which secures or releases the tool-holding sleeve and an adjusting element, which is at least operatively connected to the fixation element, wherein the adjusting element comprises an elongate pin which is movable substantially parallel to the central axis of the tool-holding sleeve, wherein the elongate pin has a first section with a first outside dimension and a second section with a second outside dimension being different from said first outside dimension, wherein the elongate pin is movable substantially parallel to the central axis of the tool-holding sleeve relative to a contact area on or adjacent to the tool-holding sleeve, such that, in a first position, one of the first section with the first outside dimension and the second section with the second outside dimension is arranged opposite the contact area, and in a second position, the other of the first section and the second section is arranged opposite the contact area, such that, in one of the first position and the second position, the tool-holding sleeve is secured in a rotational position, and in the other of the first position and the second position, the tool-holding sleeve is allowed to freely rotate.