Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1988-02-26
1989-05-30
Peshock, Robert
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
453133, A61C 102
Patent
active
048346527
ABSTRACT:
The handpiece comprises a speed reducer (34) formed by an interchangeable modular unit. This reducer (34) is mounted in a housing (15) equipped with bearings (16, 17) supporting the input shaft (1), and the output shaft (10) respectively. The housing is closed on the input side by a side plate (18) formed from a piece which has a fixed wheel (7), is concentric with respect to the input shaft and is equipped with radial toothing (6) facing the inside of the housing (15). The output shaft (10) comprises, at its rear end, an output wheel (9) having a radial toothing (8) facing the interior of the housing. A ball thrust bearing is provided between an internal shoulder (15a) of the housing and an external shoulder (9a) of the output shaft. On an inclined cylindrical part (2) extending the input shaft (1), there is mounted, in free rotation, an intermediate wheel (3) provided on each of its faces with radial toothings ( 4, 5), one of which cooperates with the radial toothing of the fixed wheel (7), and the other with a radial toothing (8) of the output wheel (10). The gearing ratios are selected such that the intermediate wheel transmits a geared-down rotation to the output wheel (9).
REFERENCES:
patent: 4475889 (1984-10-01), Garcia et al.
Micro-Mega (Suisse) S.A.
Peshock Robert
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