Turbine-driven dental instrument

Abstract

Flow-driven dental instrument (1), comprising a grip part (2), a head part (3), a media line (4), and a fastening means (8), wherein the grip part (2) is constructed in the form of a sleeve with two ends and a media connection (5) is disposed on the first end. At the second end, the head part (3) projects at least partially into the grip part (2). A first end of the media line (4) is connected to the head part (3) and the media line (4) extends from the head part (3) through the grip part (2) to the media connection (5). The fastening means (8) comprises a sleeve (9) having an external thread and a nut (10) having an internal thread, wherein the sleeve (9) is connected to the outer wall of the media line (4) in a material-locking manner and, at least in a direction toward the head part (3), the nut is held in the grip part (2) in a fixed position.

1 . Flow-driven dental instrument, comprising a grip part, a head part, a media line for a medium and a fastening means for connecting the head part with the grip part, wherein
 the grip part is constructed in the form of a sleeve with a first end and a second end,   a media connection for a supply line providing the medium is disposed on the first end of the grip part,   the head part is disposed on the second end of the grip part, and at least partially projects into the grip part,   the media line is connected to the head part in a force-locking, form-locking and/or material-locking manner,   the media line extends from the head part through the grip part to the media connection,   the fastening means comprises a sleeve having an external thread and a nut having an internal thread corresponding to the external thread,   the nut is disposed in the grip part and, at least in a direction toward the head part, is held in the grip part in a fixed position relative to said grip part, and   to fasten the head part to the grip part, the nut is at least partially screwed onto the sleeve fastening means, wherein   the external thread is provided on a sleeve disposed around the media line on an outer wall of the media line between a first end of the media line and a second end of the media line, and is connected to the outer wall in a material-locking manner and wherein   in a region comprising the sleeve and together with the sleeve, the media line comprises a first wall thinness and, in a remaining region, comprise a second wall thickness, whereby the first wall thickness is greater than the second wall thickness.   
     
     
         2 . Flow-driven dental instrument according to  claim 1 , wherein the media line is constructed as a tube or as a hose. 
     
     
         3 . Flow-driven dental instrument according to  claim 1 , wherein the nut is held in the grip part, in a direction toward the head part, by means of a holding plate and a projection on an inner wall of the grip part. 
     
     
         4 . (canceled) 
     
     
         5 . Flow-driven dental instrument according to  claim 1 , wherein the second wall thickness is between 0.1 mm and 0.3 mm and/or the first wall thickness is between 0.2 and 0.5 mm. 
     
     
         6 . (canceled) 
     
     
         7 . Flow-driven dental instrument according to  claim 1 , wherein the external thread of the sleeve comprises a pitch of 0.2 to 0.4 mm. 
     
     
         8 . Flow-driven dental instrument according to  claim 1 , wherein the sleeve is connected to the outer wall of the media line in a material-locking manner by soldering or by adhesive bonding. 
     
     
         9 . Flow-driven dental instrument according to  claim 1 , wherein the media line is a compressed air line for propellant air, a spray water line or a spray air line. 
     
     
         10 . Flow-driven dental instrument according to  claim 1 , wherein the sleeve is disposed around at least two media lines. 
     
     
         11 . Flow-driven dental instrument according to  claim 1 , wherein the sleeve and/or the media line comprise stainless steel, brass, or copper-nickel-zinc alloy.