Dental handpiece having coaxial ring gears rotatable at differen

Details Dental handpiece having coaxial ring gears rotatable at differen Dental handpiece having coaxial ring gears rotatable at differen

1992-08-13

1994-01-25

Wilson, John J.

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

A61C 102

Patent

active

052811387

ABSTRACT:
A dental handpiece includes a drive shaft which is driven by a drive motor and which has two coaxial ring gears which can selectively be coupled to shafts passing through different tool carriers. Different angular speeds of the coaxial ring gears is achieved by the inner ring gear being directly connected to the drive shaft, whereas the outer ring gear is driven by the drive shaft by way of a planetary transmission.

REFERENCES:
patent: 3229369 (1966-01-01), Hoffmeister et al.
patent: 3942392 (1976-03-01), Page, Jr. et al.
patent: 4121342 (1978-10-01), Flatland
patent: 4433957 (1984-02-01), Nakanishi

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