Surgical turbine

Claim 1

IN A SURGICAL TURBINE, AN ELONGATED HOUSING OF A SIZE SUITABLE TO BE HELD PEN-LIKE IN THE HAND, MEANS FOR SUPPLYING FLUID PRESSURE TO ONE END OF SAID HOUSING, A COLLET AT THE OTHER END OF SAID HOUSING FOR THE RECEPTION OF THE SHANK OF A SURGICAL BUR OR THE LIKE, A SHAFT, BEARINGS JOURNALING SAID SHAFT IN SAID HOUSING FOR ROTATING SAID COLLET, SAID COLLET BEING MOUNTED ON THE OUTER END OF SAID SHAFT, A TURBINE WHEEL ON SAID SHAFT FOR ROTATING THE SAME, MEANS FOR DIRECTING FLUID PRESSURE TO THE VANES OF SAID TURBINE WHEEL INCLUDING A CONTROL VALVE, A BRAKE FOR SAID SHAFT COMPRISING A FRICTION APPLYING ELEMENT LONGITUDINALLY MOVABLE WITH RESPECT TO SAID HOUSING AND NORMALLY BIASED TO ENGAGE THE INNER END OF SAID SHAFT, A BRAKE RELEASE ELEMENT MOVABLE TRANSVERSELY OF SAID HOUSING, AND A CONTROL LEVER PIVOTED AT ONE END TO SAID HOUSING AND EXTENDING LONGITUDINALLY THERETO SO THAT INDEX FINGER PRESSURE MAY BE APPLIED THERETO AS SAID HOUSING IS HELD IN THE HAND, SAID CONTROL LEVER UPON INITIAL DEPRESSION COOPERATING WITH SAID BRAKE RELEASE ELEMENT AND THEREAFTER UPON FURTHER PRESSURE COOPERATING WITH SAID CONTROL VALVE TO OPEN IT IN PROPORTION TO THE DEGREE OF PRESSURE APPLIED TO SAID CONTROL LEVER.