Turbine driven air bearing dental handpiece

Claim 1

AN INFLOW IMPULSE TURBINE COMPRISING, A HOLLOW ROTOR HAVING FIRST AND SECOND FRUSTO-CONICAL END SURFACES AND A CYLINDERICAL SURFACE THEREBETWEEN, A HOLLOW HOUSING OF COMPLIMENTARY SYMMETRY AS COMPARED WITH SAID ROTOR SEPARATED FROM, AND ENCLOSING SAID ROTOR, THE SEPARATION BETWEEN SAID ROTOR AND SAID HOUSING BEING SUBSTANTIALLY UNIFORM AND OF SUCH DIMENSION AS TO ESTABLISH A HYDROSTATIC FILM THEREBETWEEN, A SOURCE OF PRESSURIZED FLUID COMMUNICATING WITH THE INTERIOR OF SAID HOUSING FOR ESTABLISHING SAID HYDROSTATIC FILM, THE RADIAL LOAD ON SAID ROTOR BEING SUPPORTED BY THE COMPLETE FILM AND THE END THRUST LOADS ON SAID ROTOR BEING SUPPORTED BY THE FILM AT THE FRUSTO-CONICAL END SURFACES, NOZZLE MEANS COMMUNICATING THE INTERIOR OF SAID HOUSING WITH THE INTERIOR OF SAID ROTOR, EXHAUST PASSAGE MEANS COMMUNICATING THE INTERIOR OF SAID ROTOR WITH THE EXTERIOR OF SAID HOUSING, WHEREBY ROTARY MOTION MAY BE IMPARTED TO SAID ROTOR AS A RESULT OF THE PASSAGE OF SAID PRESSURIZED FLUID FROM THE SPACE BETWEEN THE HOUSING AND THE ROTOR THROUGH SAID NOZZLE MEANS.