Surgical, torque-transferring instrument including an associated tool

Abstract

A chip-removing tool of a surgical torque-transferring instrument includes a distal engagement segment or tool head which is adjoined by a tool shaft whose proximal end portion is prepared for a torque-transferring insertion into a tool mounting of the instrument. The proximal end portion is subdivided at least in a functional section for torque transmission and a functional section for axial locking which is axially spaced therefrom. The functional section for axial locking, with respect to its geometry, includes parameters which are intended to be changed and cooperate according to the key/keyhole principle only with one tool mounting including corresponding geometrical mating parameters for a correct mounting of the tool.

1 .- 10 . (canceled) 
     
     
         11 . A chip-removing tool of a surgical torque-transferring instrument comprising:
 a distal engagement segment adjoined by a tool shaft whose proximal end portion is prepared for a torque-transferring insertion into a tool mounting of the instrument, wherein the proximal end portion is subdivided at least in a functional section for torque transmission and a functional section for axial locking axially spaced therefrom,   wherein the functional section for axial locking, with respect to its geometry, comprises parameters which are intended to be changed and cooperate according to a key/keyhole principle only with one tool mounting comprising corresponding geometrical mating parameters for a proper mounting of the tool.   
     
     
         12 . The chip-removing tool according to  claim 11 , wherein the functional section for axial locking, with respect to the tool engagement segment, is arranged proximal relative to the functional section for torque transmission. 
     
     
         13 . The chip-removing tool according to  claim 12 , wherein the functional section for axial locking is situated outside a torque transmission train. 
     
     
         14 . The chip-removing tool according to  claim 12 , wherein, in the functional section for axial locking, the tool shaft diameter is smaller than in the functional section for torque transmission. 
     
     
         15 . The chip-removing tool according to  claim 11 , wherein the geometric parameters intended for being changed can be selected among the shaft diameter, the axial length, the axial distance between the functional section for torque transmission, and undercuts arranged on the circumference of the shaft in the functional section for axial locking, notches or lathed portions for the introduction of an axial force into the tool shaft, the notch shape and/or circumferential position of the notches with respect to the geometry in the functional section for torque transmission. 
     
     
         16 . The chip-removing tool according to  claim 15 , wherein the geometrical parameters, which are to be changed or can be destined for being changed, form a tool coding means for the only possible use of a tool in a specific handpiece shaft. 
     
     
         17 . The chip-removing tool according to  claim 15  comprising the following parameter combinations:
 small diameter—short distance; 
 small diameter—large distance; 
 large diameter—small distance; and 
 large diameter—large distance. 
 
     
     
         18 . A surgical torque-transferring instrument comprising:
 a tool mounting for selectively receiving a rotatably supported surgical tool, the tool mounting configured for axially securing the tool in the tool mounting as well as for transferring a torque to the tool, wherein the tool comprises:   a distal engagement segment adjoined by a tool shaft whose proximal end portion is prepared for a torque-transferring insertion into the tool mounting, wherein the proximal end portion is subdivided at least in a functional section for torque transmission and a functional section for axial locking axially spaced therefrom,   wherein the functional section for axial locking, with respect to its geometry, comprises parameters which are intended to be changed and cooperate according to a key/keyhole principle only with one tool mounting comprising corresponding geometrical mating parameters for a proper mounting of the tool.   
     
     
         19 . The surgical torque-transferring instrument according to  claim 18  comprising a universal handpiece comprising an integrated torque transmission train and/or drive and a selectable handpiece shaft comprising an integrated tool mounting, said handpiece shaft being able to be flanged to the universal handpiece while coupling the tool mounting to the torque transmission train or drive. 
     
     
         20 . The surgical torque-transferring instrument according to  claim 18 , wherein the tool mounting comprises a torque transmission section as well as an axial locking section axially spaced therefrom, which are able to be brought into operative engagement with the tool-side functional sections for torque transmission and axial locking, with the following geometrical parameters being selectable for the purpose of individual alteration:
 the mounting diameter in the torque transmission section;   the axial length of the torque transmission section; and   the axial distance between the torque transmission section and the axial locking elements in the axial locking section.