Dental turbine support structure

Details Dental turbine support structure Dental turbine support structure

A - Human Necessities

61

C

A61C 1/05 (2006.01) A61C 1/18 (2006.01)

Patent

CA 2454476

A support structure for a turbine motor for use in a dental handpiece includes a pair of resilient rings to capture and limit rotation of an outer race of a bearing supporting a rotor of the turbine motor, The turbine motor is supported by first and second bearing assemblies, the first bearing assembly being proximate a dental tool and the second bearing assembly being distal the dental tool. The pair of rings are preferably located on the first bearing assembly, but optionally could be located on only the second bearing assembly or on both first and second bearing assemblies. The support structure further includes a resilient spacer ring located on the second bearing assembly to provide axial pre-load to the bearing assemblies.

Ce brevet décrit un organe de support de moteur de turbine utilisé dans une pièce à main dentaire; il comporte une paire d'anneaux souples pour soutenir le chemin de roulement extérieur sur lequel repose le rotor du moteur de la turbine et en limiter la rotation. Le moteur de turbine est soutenu par le premier jeu et le second jeu de roulements, le premier étant situé près de l'outil dentaire et le second loin de ce dernier. Idéalement, la paire d'anneaux est située sur le premier jeu de roulements, mais pourrait aussi être située sur le second jeu ou encore sur les deux jeux de roulement. L'organe de support comprend aussi une rondelle d'espacement souple sur le second jeu de roulements pour assurer le préchargement axial des jeux de roulements.

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