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Dentists preparation instrument

An instrument and dental technology, applied in the field of dental processing instruments, can solve the problems of unfavorable noise characteristics of turbines and unfavorable service life of bearings

Active Publication Date: 2015-03-18
SIRONA DENTAL SYSTEMS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the idling speed in order to increase the maximum power is not good for the service life of the bearings and is not good for the noise characteristics of the turbine

Method used

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Experimental program
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Embodiment Construction

[0029] figure 1 In a partially exploded side view, a dental treatment device 1 is shown schematically, which has a turbine 4 to which compressed air is applied to drive a tool 3 mounted and driven in the head part 2 . The turbine 4 contains a turbine chamber 5 in which a rotor 6 is mounted rotatably about a longitudinal axis 7 . The support of the rotor 6 in the head part 2 itself and the interaction of the rotor 6 with the tool 3 are not shown, in this regard refer to, for example, the background art in the literature cited at the outset, from which various different s solution. The processing device 1 has a central axis 27 which also extends through the head part 2 .

[0030] In addition to the compressed air supply (not shown), return air ducts 8 are provided in the head part 2, which conduct compressed air out of the turbine chamber 5 so that the compressed air is conducted via the handle part to the processing device. The coupling part is likewise known from the backgr...

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Abstract

Disclosed is a dentists' preparation instrument (1) comprising a turbine (4) for driving a tool (3) using compressed air, and a rotor (6) that is arranged in a turbine compartment (5), rotates about a longitudinal axis (7), and has blades (11) extending to a face (13) of the rotor (6). The turbine compartment (5) has a wall (10) opposite the face (13), and a discharge port (12) for the compressed air in the direction of a returning air duct (8). The discharge port (12) is disposed in such a way that at leasts parts of the blades (11) swipe past the discharge port (12) as they rotate about the longitudinal axis (7). The turbine compartment (5) also has a disruptive contour chamber (15) that adjoins the face (13). The face (13) of the blades (11) of the rotor (6) that faces the disruptive contour chamber is open towards the disruptive contour chamber (15). Inside the disruptive contour chamber (15), a disruptive contour (9) is formed on the wall (10) opposite the face (13) by at least one projection (14) extending along a height (h) in the direction of the longitudinal axis (7).

Description

technical field [0001] The invention relates to a dental treatment appliance with a turbine for driving tools by means of compressed air. A rotor arranged in a turbine chamber and rotating about a longitudinal axis has blades extending as far as the rotor end side. The turbine chamber has a wall facing the end side and has compressed air outlet openings facing the return air duct, wherein the outlet openings are arranged in the turbine chamber in such a way that at least part of the rotor blade rotates about the longitudinal axis When passing by the discharge hole. Background technique [0002] Known dental treatment instruments with a turbine drive, also known as dental turbines, use air under pressure to drive the rotor. The kinetic energy of the air produces force impacts on the rotor blades through pulse exchange. The impact of force creates a torque on the rotor, and the corresponding rotational speed depends mainly on the speed of the air flowing out of the nozzle d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C1/05
CPCA61C1/05
Inventor M. 赖因S. 戈伊泽M. 埃图格鲁尔R. 苏特
Owner SIRONA DENTAL SYSTEMS
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