Polishing device

In a tooth polishing device wherein a polishing tool is secured to a power drive means and said powder drive means is pivotably mounted in a casing for movement between first and second positions within said casing and including a motor;

• and power supply means, including a switch, are coupled to said power drive means for supplying electrical power thereto;
• the improvement comprising:
• said power drive means including a speed reducer gear and bearing means rotatably mounting said speed reducer gear;
• said speed reducer gear comprises an annular gear member with gear teeth on the inner surface thereof and an output shaft journalled in said bearing means, said bearing means surrounding said annular gear member and attached to said motor, and said motor having a geared output shaft of substantially smaller diameter than the speed reducer gear, said output shaft engaging the teeth of the speed reducer gear, whereby said motor, gear reducer means and bearing means pivot within said casing as a unit.

A tooth polishing device comprising in combination:

• a polishing tool;
• a power drive means mounting said polishing tool for rotation to effect polishing action;
• a sealed elongated casing housing said power drive means with said power drive means extending from one end of said casing;
• means pivotably mounting said power drive means within said casing;
• means sealing the joint between said power drive means and said casing;
• a battery mounted in said sealed casing;
• means electrically coupling said battery to said power drive means to apply electrical power thereto for operation of said polishing tool, said coupling means including switch means for opening and closing said electrical coupling means upon pivotable movement of said power drive means within said casing;
• and
• recharging contacts on said casing and electrically coupled to said battery;
• whereby said battery may be recharged while it is in said sealed casing.