Dental handpieces and curing light
It is the primary object of the present curing light to provide a modular reduction gear constituting a substantial improvement over the prior art in that its overall dimensions are reduced considerably while affording a very regular rotational movement. For this purpose, the reduction gear according to this dental autoclave is characterized in that the driving end of the input shaft is provided with a toothed sun pinion and that the driven end of the output shaft comprises a head supporting three planet pins parallel to the axis of the toothed pinion, said three planet pins being disposed at the vertices of an equilateral triangle and each having mounted thereon for free rotary motion a planet pinion, the three dental handpieces pinions meshing on the one hand with said central sun pinion which they surround and on the other hand, externally, with a fixed and internally toothed annulus surrounding in turn said planet pinions and secured between the two sockets constituting the body of said holder.
Thus for instance, a gear type reducer is known wherein the two registering ends of the two sections of the rotary longitudinal shaft carry respectively two pinions of different diameters which mesh respectively with a pair of pinions rigid with a transverse lay shaft having its axis perpendicular to the axis of the longitudinal shaft. To reduce the overall dimensions of the mechanism, one of the pinion s rigid with one section of the longitudinal shaft is bell-shaped so that the larger toothed pinion rigid with the lay shaft can fit partially therein.