Dentistry – Apparatus – Having intra-oral dispensing means
Patent
1999-02-03
2000-03-21
Lewis, Ralph A.
Dentistry
Apparatus
Having intra-oral dispensing means
451 99, A61C 302, B24C 700
Patent
active
060395672
ABSTRACT:
A dental abrasion arrangement includes a pressure vessel that has an inlet port and an outlet port. A source of pressurized propellant gas is attached to the inlet port and a dental abrasion tool is attached to an outlet port of the pressure vessel. Abrasive powder is ejected from the pressure vessel and to the abrasion tool via a discharge assembly and the outlet port. A feeding and metering auger is mounted within the pressure vessel. The auger is mounted substantially horizontally within the pressure vessel. The auger is driven by a motor, so that the abrasive powder within the pressure vessel is fed to the discharge assembly as the motor causes the auger to rotate. The rotation of the auger, and thus the feed rate of powder to the tool, is preferably adjusted by a controller, which controls the rotation of the motor, preferably according to pre-determined profiles that take into account parameters such as the geometry of the auger and the dental tool, as well as variables such as the internal pressure in the pressure vessel. The outer casing of the pressure vessel can be made so small that it can be mounted on a standard dental tray, or on a supporting arm of a dental chair.
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Abbott John D.
Vassiliadis Arthur
Dove Systems, Inc.
Lewis Ralph A.
Slusher Jeffrey
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