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Publication numberUS3789506 A
Publication typeGrant
Publication dateFeb 5, 1974
Filing dateDec 23, 1971
Priority dateOct 16, 1969
Also published asDE2129542A1
Publication numberUS 3789506 A, US 3789506A, US-A-3789506, US3789506 A, US3789506A
InventorsJohns R
Original AssigneeVann Brothers Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dental handpieces
US 3789506 A
Abstract
A handpiece for a dental drill 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.
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Description  (OCR text may contain errors)

United States Patent 1191 Johns Feb. 5, 1974 15 DENTAL HANDPIECES 3,032,878 5/1962 White 32/27 [75] Inventor: Richard Bell Johns, Orpington,

England Primary Examiner-Louis G. Mancene [73] Assignee: Vann Brothers Limited, London, Asslsmm Lever England Attorney, Agent, or Firm-Barlow & Barlow [22] Filed: Dec. 23, 1971 [21] Appl. No.: 211,458 [57] ABSTRACT A handpiece for a dental drill comprising a fibre optic [52] US. Cl. 32/27 light conductor p g along i i the handpiece and A616 l/l0 emerging towards the operative end thereof the Said 1e 0 are 32/26, 27 conductor terminating adjacent the operative end of the handpiece so as to illuminate a drill tip when such [5 6] References C'ted is fitted in the handpiece.

UNITED STATES PATENTS 3,614,414 10/1971 Gores 32/27 3 Claims, 3 Drawing Figures Patented Fe'b. 5, 1974 3,789,506

Flew.

1 DENTAL HAN DPIECES 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 drill 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 drill 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 light, for maintenance, sterilization or other purposes.

The invention is applicable to dental handpieces of all types, including both straight and contra-angle handpieces, and in particular, it is independent of the form of power used for driving the drill.

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

FIG. 1 is a side elevation of a dental handpiece incorporating a light conductor accordingto a preferred form of the invention;

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

FlG. 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). The handpiece is supplied with air and water through a composite flexible line 4 which is attached to the handpiece by a connection to be more described below and which incorporates a mould sleeve 5.

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. The conductor 6 is itself substantially rigid and mounted so as to maintain its location within the body of the handpiece 1 in relationship with a water conduit 7 and a pair of air conduits 8. Light is supplied to the conductor 6 by way of a flexible light conductor 9, the remote end of which (not shown) is located adjacent a suitable light source. For ease of handling, the conductor 9, may be secured to the assembly 4, at least over part of their mutual length.

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. The free ends of the conductor 6 and the conduits 7 and 8, which are within the body of the handpiece 1, are received through suitable apertures in the base of a socket 10 seated in the body, and a neopreme or like gasket 11 is also sealingly received over the free ends. The passages in the assembly 4, and the conductor from the flexible conductor 9, are suitably terminated in a plug 12 which fits within the socket 10 to provide a proper mating connection between the parts. After assembly, the sleeve 5 is screwed over the end of the body 1 and bears on abutments 13 on the socket 12 to compress the gasket and maintain a water air and light tight joint.

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

I claim:

1. In a handpiece for a dental drill having a tubular wall and an operative end adapted to receive a drill tip, a plurality of internal service lines extending through said handpiece, that im-provement comprising a fibre optic light conductor passing along inside the tubular wall of the handpiece and emerging through the wall thereof adjacent said operative end, the said conductor terminating adjacent the operative end of the handpiece, a second flexible fibre optic light conductor arranged as a continuation of the said first mentioned light conductor at the end remote from said operative end for illuminating a drill tip when such is fitted in the operative end of the handpiece, a composite connection for connecting said internal service lines to external service lines and said second fibre optic conductor to the first fibre optic conductor including a socket inserted in the end of the handpiece remote from the operative end, said socket having a base through which project ends of the internal service lines and the said first mentioned fibre optic light conductor from within the handpiece, and a plug member received in the socket and having recesses for receiving the said external service lines and flexible light conductor whereby the external lines and conductor and internal lines and conductor may be connected together.

2. A handpiece as claimed in claim 1 comprising a compressible gasket between the end of the plug member and the base of the socket.

3. A handpiece as claimed in claim 1 in which the light conductor emerges at a position through the wall of and offset from the center axis of the handpiece adjacent the operative end thereof, and is angled to direct light towards the position of the drill tip received on the operative end.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3032878 *Mar 14, 1960May 8, 1962White Raymond ADental handpiece control
US3614414 *Apr 3, 1970Oct 19, 1971Kirkman Lab IncWork area illuminator
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3893242 *Jun 5, 1974Jul 8, 1975Star Dental Mfg CoAir driven dental handpiece
US4014098 *Jul 21, 1975Mar 29, 1977Vicon Products CorporationFiber optics element and dental handpiece containing the same
US4020556 *Jan 14, 1972May 3, 1977Star Dental Manufacturing Co., Inc.Air driven dental handpiece
US4303392 *Jul 9, 1979Dec 1, 1981A-Dec, Inc.Dental handpiece with quick disconnect coupling
US5096418 *Jul 5, 1990Mar 17, 1992Micro Motors, Inc.Motorized dental handpiece with fiber optic illumination
US5312349 *Nov 25, 1992May 17, 1994Kaltenbach & Voigt Gmbh & Co.Medical treatment device, in particular for surgical purposes
US5503559 *Sep 30, 1993Apr 2, 1996Cedars-Sinai Medical CenterFiber-optic endodontic apparatus and method
US5868571 *Feb 12, 1998Feb 9, 1999Nakanishi Inc.Dental hose assembly
US7104794Jun 28, 2004Sep 12, 2006Discus Dental Impressions, Inc.Ultrasonic dental tool having a light source
US8491300Oct 30, 2007Jul 23, 2013Zila, Inc.Ultrasonic dental tool having a light source
US20050032017 *Jun 28, 2004Feb 10, 2005Haim LevyUltrasonic dental tool having a light source
US20050095557 *Dec 16, 2004May 5, 2005David PollockUnitized modular ultrasonic handpiece cable connector
Classifications
U.S. Classification433/29, 433/165, 433/126
International ClassificationA61C1/08
Cooperative ClassificationA61C1/088
European ClassificationA61C1/08L