Abstract: A tool holder is furnished for fastening a dentistry-type tool to be subjected to vibrations. A core is attached to a generator of vibrations and includes a housing for a tool. A locking assembly cap having a rear end is fitted onto a forward area of the core. A locking assembly sliding component is placed over a rear area of the core for contacting the rear end of the core with front end of the locking assembly cap. A compressive spring engages the core and the locking assembly sliding component for pushing the locking assembly sliding component in a forward direction.

Abstract: A dental drill having an elongate drill body tapered to a conical tip. The drill body has a plurality of substantially identical barbs projecting outwardly from the drill body and arranged helically about the drill body. Each barb has an outer peripheral profile resembling a parabola in shape extending generally toward the tip of the drill body. Each barb has a flat surface contiguous with the flat surface of an adjacent barb at a point of juncture with the drill body. The barb flat surfaces are disposed in a common helical path about the drill body and each has a shape resembling a parabola. The barbs have a peripheral profile also resembling a parabola. Each resembles a paraboloid in which intersections by planes parallel to the corresponding flat surface thereof and spaced axially on the drill body resemble parabolas with the axes thereof decreasing in length as the intersections are made in a direction toward the tip of the drill body.

Abstract: A syringe is provided with a helical spring, which furnishes an upper limit to a pressure employed via a plunger to move a fluid or paste through an opening in a syringe. The plunger is maintained in a low compressing state versus the fluid with the helical spring. A toothed rack is attached to the plunger. The toothed rack is engaged by a ratchet forming part of a lever. The lever is hinged on an axially movable assembly. Actuation of the lever drives the ratchet and therewith toothed rack and plunger forward against the force of the spring. As more force is applied to the plunger the resilient force of the compression spring allows the axially movable assembly to move backward and thus to limit the pressure exerted by the plunger on the fluid. A second ratchet can be provided for preventing a backward motion of the toothed rack while the lever seeks a new point of engagement for the ratchet with the toothed rack.

Abstract: System of coupling of the head of a drive unit to the body of a driven unit, characterized in that, the head bears a longitudinal key having two slopes inclined in relation to the axis of the head, and the body has a guiding or key-way groove for this key, this groove opening on an annular clearing in which a segment can be rotated against a spring and in which a pin is fastened radially, so that, while the key is engaged, this pin, by cooperation with the first of the slopes controls the rotation of the segment, then by cooperation with the second slope controls the blocking of the head in its driving position, and the segment can also be operated by hand so as to free the pin and allow the withdrawal of the head by drawing the key rearwardly.

Abstract: The invention relates to a dental drill.According to the invention, the drill has a triple helicoidal flute and progressive pitch, the free spaces between the cutting lips increasing from the tip (3) toward the shank (1) of the drill.Application: dental apparatus.

Abstract: A dental tool having a head with an output spindle to which are coupled dental treating devices such as a dental massaging brush. The output spindle is driven with a reciprocatory rotary motion imparted to it from a rotationally driven drive shaft coupled to the output spindle by a drive coupling device which converts the rotational motion of the drive shaft to reciprocatory rotary output of the output spindle. An O-ring effects a seal about the output spindle where it extends outwardly of the head. The drive coupling device has an eccentric stud fixed eccentrically to the drive shaft extending therefrom from one side to the other of a projection of the longitudinal axis of the drive shaft and making an angle with the projection of the axis. The eccentric stud is received in an axial slit in the output spindle for effecting the motion conversion.

Abstract: A device for supplying luminous energy to a dental instrument to illuminate the area of treatment on a tooth being treated. The luminous energy is applied from a bulb housed in the device through an optical fiber extending through the dental instrument and having an end disposed for receiving the luminous energy from the bulb. Provision is made for energizing the bulb when the device is mounted on an electrical supply cable. A contact arrangement of two conductive studs disposed in a bore of an insulating sleeve and axially biased by a conductive spring to extend from the bore provides for making contact between the bulb and supply cable when the device is mounted on the supply cable. A section of the bore of the sleeve between the ends of the sleeve defines shoulders limiting the axial travel of the studs which have enlarged ends for engaging the shoulders.

Abstract: A container for dental instruments has a thin plate provided with a plurality of pairs of opposed recesses disposed in two parallel rows in a major surface of the plate. A plurality of channels connect the two recesses in each of the pairs of recesses. Dental instruments are received by the pairs of recesses and their interconnecting channels and are covered by a cover secured to the surface of the plate having the recesses. A plurality of containers may be stacked and held together by a clamp for ease of shipping or storage.