Dental bur cooling device

Claim 1

A GENERALLY CYLINDRICAL DENTAL TURBINE HOUSING HAVING AN OPENING AT ONE END, AN AIR-DRIVEN TURBINE WITHIN SAID HOUSING IN COMBINATION WITH BEARING MEAND MOUNTING SAID TURBINE FOR ROTATION WITHIN THE HOUSING ABOUT AN AXIS CONCENTRIC WITH SAID OPENING, MEANS TO MOUNT A BUR ON SAID TURBINE TO PROJECT OUTWARDLY THROUGH SAID OPENING, MEANS TO SUPPLY MOTIVE AIR TO THE INTERIOR OF THE HOUSING TO DRIVE THE TURBINE, SEPARATE CONDUIT MEANS SUPPORTED BY THE HOUSING, SAID CONDUIT MEANS PROVIDED WITH INLET MEANS FOR CONNECTION WITH A LIQUID SUPPLY MEANS, SAID HOUSING BEING PROVIDED WITH AN APERTURE ADJACENT SAID OPENING TO EXHAUST A PORTION OF SAID AIR IN A DIRECTION GENERALLY PARALLEL WITH A BUR SHAFT DRIVEN BY THE TURBINE, SAID CONDUIT MEANS TERMINATING IN AN OUTLET ORIFICE POSITIONED TO DIRECT SAID LIQUID ANGULARLY TOWARD A BUR SHAFT AND INTO CONFLUENCE WITH SAID EXHAUSTED AIR TO ATOMIZE SAID LIQUID AND FORM A SPRAY TO COOL THE WORKING PORTION OF THE BUR.