Tool holder for a rotary tool
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United States of America Patent
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May 14, 2013
Grant Date -
Aug 18, 2011
app pub date -
Apr 25, 2011
filing date -
Jun 14, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A shrink-fit chuck tool holder which comprises: clamping means which are provided centrally with respect to an axis of rotation of the tool holder for holding a shank of a rotary tool, and which define a receiving opening for the shank. The clamping means can be displaced in the radial direction between a release position for insertion or removal of the shank and a clamping position. The clamping means are assigned a clamping surface with a cylindrical contour which, in the clamping position, bears against the outer circumferential surface of the shank. The clamping surface has a helical groove surrounding the axis of rotation or a multiplicity of annular grooves surrounding the axis of rotation, which as seen in the direction of the axis of rotation project towards the axis of rotation and the roof surfaces of which form the clamping surface.
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