Patent
1976-04-23
1977-10-18
Peshock, Robert
A61C 110
Patent
active
040539830
ABSTRACT:
A prophylactic angle head for a dental handpiece having a driver in a threaded casing has a housing made up of an upper housing shell and a lower housing shell. The shells have faces meeting on a common plane. When put together the shells define an approximately spherical interior chamber having an opening to the outside and define a tube in communication with the chamber. The threaded casing engages matching threads on the housing shells to hold them together and to assemble them to the driving handpiece. A driver in the handpiece casing is coupled to a drive shaft in the housing. A bearing sleeve carries the drive shaft and is snugly seated between the two shells and assists in holding them against movement relative to each other. A bevel gear on the end of the drive shaft meshes with another bevel gear on an elongated hub and mounted for rotation on a hard, tungsten carbide pin seated in the upper shell and extending along an axis normal to that of the drive shaft. The hub extends toward the opening and is internally threaded to receive a dental tool.
REFERENCES:
patent: 1198628 (1916-09-01), Ebenreiter
patent: 1838982 (1931-12-01), Angell
patent: 3798777 (1974-03-01), Reiter
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