Dentistry – Apparatus – Hand manipulatable implement
Patent
1997-12-29
1999-08-24
Wilson, John J.
Dentistry
Apparatus
Hand manipulatable implement
433114, 433126, 433133, A61C 300
Patent
active
059417056
ABSTRACT:
A manual drive endodontic handpiece includes a housing having proximal end and a distal end provided with an angle head which receives a dental tool. A drive shaft extends through the housing and is coupled to a manual driver such that rotational movement of the manual driver causes rotational movement of the shaft. A pinion gear is provided at the distal end of the drive shaft and enters into the angle head. Rotation of the manual driver relative to the housing causes rotational movement of the pinion gear at the distal end of the shaft. A dental tool provided in the angle head has a head that includes a pinion gear which meshes with the pinion gear at the distal end of the shaft and is rotated by rotational movement of the pinion gear at the distal end of the shaft. According to one embodiment, the housing is provided with windows through which the manual driver may be directly rotated. According to another embodiment, an offset manual driver in conjunction with an axial driver permit manual rotation of the drive shaft. A spring is provided between the driver and drive shaft and biases the pinion gear at the distal end of the shaft into the angle head. Means are provided for moving the shaft against the bias of the spring to retract the pinion gear from the angle head and to permit a dental tool to be inserted in and removed from the angle head.
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Product Catalog, Nobelcare AB, 1996, Special Equipment and Torque Driver Set shown at p.52.
Advertisement for Tri Auto-ZX, for J. Morita USA Inc., Aug., 1997.
De Jackmo Frank
Makris Georghios
Jacobson David S.
Odontal Associates
Wilson John J.
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