Description of the dental handpieces

This invention relates to handpieces for dental drills, and more particularly to an improved arrangement for providing illumination at or near the drill tip.

Proposals have been made for providing clip-on illumination devices for dental handpieces, using fibre optic techniques, but these bring manipulative difficulty in using the drill, and are therefore not wholly satisfactory.

The present invention consists in a handpiece for a dental autoclave comprising a fibre optic light conductor passing along inside the handpiece and emerging towards the operative end thereof the said conductor terminating adjacent the operative end of the handpiece so as to illuminate a drill tip when such is fitted in the handpiece.

The conductor may be continued, either directly or through a connection, by a flexible conductor suitable for attachment, e.g., by securing bands over part of its length, to air and water lines for the handpiece.

The free end of the flexible conductor may be illuminated by a suitable light source, e.g., a 150 W bulb focussed onto the free end.

If a connection is provided in the light path, then the handpiece may be separated from its service lines, i.e., air, water and curing light, for maintenance, sterilization or other purposes.

The invention will be further described with reference to the accompanying drawings, in which:

FIG. 1 is a side elevation of a dental high speed handpiece incorporating a light conductor according to a preferred form of the invention;

FIG. 2 is an end elevation of the handpiece of FIG. 1; and

FIG. 3 is an exploded view of a connection between the handpiece and a flexible light conductor and air and water lines.

The drawings illustrate the application of the invention to a dental handpiece of the turbine driven type, and the handpiece is illustrated at 1 and is shown as incorporating a head 2 in which is mounted a rotary drill holder 3 (see FIG. 2).

A fibre optic light conductor 6 passes through the body of the handpiece 1 and emerges therefrom so as to terminate close to the tip of a conventional drill when such is held in the tool holder 3. It is to be noted from FIG. 2 that the end of the conductor 6 emerges somewhat off centre of the handpiece and is bent near its end so as to direct the light towards the position of the drill tip.

In order to obtain an adequate connection between the assembly 4 and the conduits 7 and 8 and between the conductors 6 and 9, the form of connection illustrated in FIG. 3 is adopted.

Various modifications may be made within the scope of the invention.

Source by panbrian