Surgical or dental instrument and cannulae for aspirating, cleaning, drying and illuminating

Claim 1

A surgical or dental instrument comprising a hollow body incorporating means for connecting it to a suction pipe, means for fitting thereon a removable cannula, means for supplying fluid which will be conveyed to the end of said cannula, and a supply of electrical current for illuminating a bulb, wherein said hollow body contains a sleeve, made of a transparent material having a refraction coefficient greater than that of air, traversed by an axial bore whose diameter is equal to the inner diameter of said cannula, said sleeve comprising, on its periphery, a housing in which is placed said bulb which emits light in the direction of said cannula, said cannula being removably connected to said hollow body; said cannula is made of a transparent material having a refraction coefficient greater than that of air, the rear end of said cannulae is, when said cannula is fitted in said hollow body, in contact with the front end of said sleeve, so that the light generated by said bulb is conveyed in said sleeve then in said cannula of which the wall performs the role of light conductor; said cannula further comprising in its wall longitudinal conduits for transporting said fluids, said conduits opening out, on the one hand, at the outer end of said cannula and, on the other hand, in the vicinity of the other end of the cannula on the outer wall of said cannula at two points which are offset longitudinally and which communicates with spaces disposed between spaced O-rings arranged in the inner face of said hollow body, into which the ends of the means for supplying said fluids also open out; said cannula and said hollow body being at the level of those parts of these pieces corresponding to the fit, of cylindrical section, so that said cannula may pivot on itself in said hollow body.