DENTAL HANDPIECE WITH VORTEX-WASHER-DRIVEN PARTICULATE DISCHARGE
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United States of America Patent
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Issued Date -
May 14, 2015
app pub date -
Nov 8, 2013
filing date -
Nov 8, 2013
priority date (Note) -
Abandoned
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Abstract
A dental handpiece has a turbine head housing a chuck assembly with a burr tube secured to and rotated by a gas-driven handpiece motor assembly supported by a bearing assembly having a first bearing. A portion of the burr tube passes through the housing end wall forming an opening concentric with and spaced from the burr tube. A cavity is formed in the housing by a first lateral face of a first flange of an outer race of the first bearing, a first end of the housing sidewall and a housing end wall. The cavity is in fluid communication with the opening in the end wall and a vent in the housing side wall. A vortex washer disposed in the cavity and fixed to the burr tube for rotation therewith draws dental worksite particulate through the opening and into the cavity and discharges the particulate through the vent.
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