Apparatus for the reduction/increase in speed of a micromotor an

Details Apparatus for the reduction/increase in speed of a micromotor an Apparatus for the reduction/increase in speed of a micromotor an

1992-07-07

1994-01-11

Braun, Leslie A.

Planetary gear transmission systems or components

Input from independent power sources

Including electric motor input

475296, 475331, F16H 3706

Patent

active

052776697

ABSTRACT:
A device for stepping down and/or stepping up the speed of rotation of a motor element, such as a dental micromotor, includes two toothed pinions with common axes of rotation and which are mounted in a support piece. The support piece can turn through an angle (.alpha.) with respect to the body o the motor element about an axis (A) parallel with an axis (o) of the input pinion of the device and offset with respect to the axis (o) by a distance (OA). The axis (A) is further offset with respect to the axis (O') of rotation of the output pinion by a distance (AO') equal to the distance (OA). As a result, in a first position, the axis (O') is merged with the axis (O), and a first one of the pinions (or a crown wheel) is meshed with elements upstream of the kinematic chain. In a second position, following rotation of the support piece through a defined angle (.alpha.), the first one of the pinions is disengaged and a second one of the pinions (or a crown wheel(), is, in turn, meshed with the elements upstream of the kinematic chain.

REFERENCES:
patent: 3631742 (1972-01-01), Hoffmeister
patent: 4040311 (1977-08-01), Page, Jr. et al.
patent: 4063470 (1977-12-01), Kelbel
patent: 4306865 (1981-12-01), Leonard
patent: 4344746 (1982-08-01), Leonard
patent: 4617837 (1986-10-01), Kataoka et al.

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