Dentistry – Apparatus – Having means to emit radiation or facilitate viewing of the...
Patent
1985-03-14
1986-12-02
Peshock, Robert
Dentistry
Apparatus
Having means to emit radiation or facilitate viewing of the...
433126, A61C 108, A61C 300
Patent
active
046262105
DESCRIPTION:
BRIEF SUMMARY
The invention is directed to a dental handpiece comprising a grip sleeve having at least one cordlike light guide in the area of the handpiece head part which passes out of the latter in the direction of the tooth treatment tool and accordingly extends in its entirety within the grip sleeve and is connected at the rear end to a light source and comprising a detachable connecting piece for the connection at the end member of a supply tube for the supply media of the handpiece, the connecting piece being arranged so as to be freely rotatable relative to the grip sleeve, wherein the connecting piece is provided with media throughpass ducts which open into it and pass through it and which are connectable with media lines of the grip sleeve leading to the use positions of the handpiece.
In a known handpiece of this type the light source is centrally located at the front end of the connection piece. Accordingly, the light guide likewise ends centrally at the end of the handpiece remote of the tool so that when the connecting piece is introduced the light source lies opposite the light guide end. Because of this arrangement it is necessary to allow the ducts for the supply media, which ducts are located in the connecting piece, to pass out radially, which necessitates a complicated course of these ducts in the connecting piece, as well as in the grip sleeve.
The object of the invention is to retain the simple course of these ducts, which object is met, according to the invention, in that the light source is arranged in the grip sleeve. The connection of the light source to the current source, which connection thereby becomes necessary, can be effected by means of a contact arrangement, known per se, between the grip sleeve and the connecting piece, which contact arrangement permits the grip sleeve and the connecting piece to rotate freely. The opinion prevailing against the arrangement of the light source in the grip piece is that the sterilization is made more difficult thereby and the light source could be damaged by means of the sterilization. Practical tests prove that this opinion is incorrect.
In addition, a handheld instrument is known in which a transition piece and a lamp chamber, which latter is connectable with the supply tube, are connected at the conventional grip sleeve. Since these parts are rigidly connected with one another, the instrument is heavy and cumbersome, an undesirable effect which is further exacerbated in that the tube is connected at the protracted end of the instrument and therefore, with its weight, brings about a considerable strain on the hand so that it is more difficult to accurately guide the tool at the tooth. The above-mentioned objects of the invention are to be provided without changing the length of the instrument or its weight.
Accordingly, the invention is characterized in a handpiece of the type named in the beginning in that the light source is arranged in a recess located, preferably eccentrically, in the grip sleeve and is electrically connected with at least one current conductor which is connectable by means of a contact arrangement, known per se, which permits a reciprocal rotation of the grip sleeve and connecting piece, with a current conductor which penetrates the connecting piece and has a contact at the end of the connecting piece remote of the tool for connecting to an opposite contact in the supply tube end member.
The invention is directed, in addition, to constructions of the new handpiece.
The subject matter of the invention is shown in the drawing in an exemplary embodiment form. FIG. 1 shows the grip sleeve, including the head part, partly in section; FIG. 2 shows the connecting piece in longitudinal section; and FIG. 3 shows the supply tube end member, likewise partly in section.
The handpiece, designated in its entirety by 1, consists of a two-part grip sleeve 2 and a grip sleeve member 3 located in the latter, as well as a head part 4 having a compressed air-operated drive unit in whose rotor shaft a tool 5 can be inserted. The grip sleeve has seve
REFERENCES:
patent: 4230453 (1980-10-01), Reimers
patent: 4403956 (1983-09-01), Nakanishi
patent: 4403957 (1983-09-01), Mossie et al.
Malata Peter
Rosenstatter Otto
Dentalwerk Burmoos Gesellschaft m.b.H.
Peshock Robert
LandOfFree
Dental handpiece does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dental handpiece, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dental handpiece will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2290516