Pressurized dental handpiece

Details Pressurized dental handpiece Pressurized dental handpiece

1974-08-05

1976-04-06

Mancene, Louis G.

A61C 108

Patent

active

039479650

ABSTRACT:
A pressurized dental handpiece has a housing in which a shaft is journalled and from which the shaft projects to support a dental tool. A high speed air turbine runner is on the shaft and is propelled by air under superatmospheric pressure brought to a nozzle for the runner through a conduit. A tubular extension of the housing surrounds the conduit and is in communication with the housing to serve as the turbine exhaust duct to the atmosphere. An adjustable valve regulates the spent exhaust air flowing from the extension to maintain a superatmospheric pressure in the extension. Some spent air is allowed to flow from the extension around the discharge of a water tube passing through the extension and the housing in the direction of the projecting shaft and dental tool.

REFERENCES:
patent: 3189999 (1965-06-01), Reiter
patent: 3210848 (1965-10-01), Bizzigotti
patent: 3364576 (1968-01-01), Kern, Jr.
patent: 3858323 (1975-01-01), Flatland

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