Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1978-10-23
1981-03-03
Shay, F. Barry
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
433133, A61C 105
Patent
active
042538327
ABSTRACT:
A dental handpiece having a cross head with one end capped and the other end open, a driven gear in the capped end having a thrust bearing against the cap, and a fixed bearing extending from the gear to the open end with a driven shaft rotatably mounted in the bearing; a threaded socket in the driven shaft to receive the complementary attaching means on a dental tool, a cylindrical recess in the open end to receive a flange on the tool and grooves in the driven shaft to restrain travel of abrasive from the open end toward the closed end thereof, the bearing being long enough to give complete bearing support for the rotating mechanism.
REFERENCES:
patent: 517248 (1894-03-01), Stanbrough
patent: 2025779 (1935-12-01), Roelke
patent: 2469261 (1949-05-01), Cooper
patent: 2813337 (1957-11-01), Uhler
patent: 2943343 (1960-07-01), Jankelson
patent: 3436830 (1969-04-01), Richmond
patent: 3472045 (1969-10-01), Nelsen et al.
patent: 3769707 (1973-11-01), Condon
Shay F. Barry
Wilson John J.
Young Dental Manufacturing Company, Inc.
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