Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1995-06-06
1996-06-25
Lucchesi, Nicholas D.
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
433125, A61C 118
Patent
active
055294952
ABSTRACT:
An angle drive dental hand piece or prophy with a drive train including an essentially cylindrical spindle frictionally engaged by the turns of a spiral spring. The driving end of the spring which in turn rotates a tool holder carrying a dental tool such as a rubber scrubber. The drive spring is bent at an angle such as a right angle while being rotated and is of a diameter in relation to the housing bore through which it passes so that there is no engagement or consequent friction from any contact of the spring with the bore housing. Overload on the tool causes slippage between the spring and the spindle on which it is wound so that damage to the drive train components from overload is avoided.
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