Positive drive chuck and bur arrangement for a dental handpiece
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United States of America Patent
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-
May 8, 2018
Issued Date -
N/A
app pub date -
Aug 18, 2014
filing date -
Jul 29, 2011
priority date (Note) -
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Abstract
A chuck assembly for a dental handpiece includes a hollow cylindrical tube portion having a first internal bore, and a chuck portion having a second bore. The chuck portion is supported within the first bore co-rotational with the tube portion about a common axis. The chuck portion has an annular body portion defining the second bore for supporting a cylindrical tool therein. A drive element comprising a drive pin inserted in a first end of the tube portion traverses the first internal bore at a first end of the tube portion. The drive pin cooperates with a distal end of a rotary tool insertable into the second bore to transfer torque to the tool. The tool has an elongated body portion having a driven portion and a working portion. The driven portion includes a shank portion with channels for receiving the drive pin.
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