Patent ID: 6152736
Filing Date: 2000-11-28
Classification: A61C,F01D,Y10S

Abstract:
Dental turbine comprising a rotor (10) which is rotatably received in a housing (12) having an inlet opening (23) for propellant air, a receiving space for the rotor (10) and a propellant air outlet (22), wherein the rotor can be loaded with propulsion air via an axial inlet and has substantially radially extending flow passages extending to the outer periphery and having tangential outlets, via which the outflowing propellant air produces tangential drive components which make the rotor rotate, characterized in that the rotor (10) is of disk-like shape; in that the rotor (10) is axially non-displaceably journalled in the housing (12) by means of mechanical bearings (14, 16); in that the rotor (10) has a co-rotating, journalled, axial inlet part (30) to the propellant air feed extending to the inlet opening (23); in that the substantially radially extending flow passages provided in the rotor (10) each merge into a part (36) extending substantially in the circumferential direction of the rotor (10) and continuing the radial flow passage (34); in that the rotor (10) is surrounded by a ring-like collection channel (24) formed in the housing and into which the rotor flow passages (34, 36) open via decompression spaces (38) formed in the rotor (10) and in that the decompression spaces (38) have a scythe-like shape in cross-section.