Patent ID: 8562343
Filing Date: 2013-10-22
Classification: A61C,F16C

Abstract:
1. A dental handpiece, comprising: a head; a grip connected to said head; a handle connected to said grip; said head containing a removably attached cartridge; a rotor mounted in said cartridge, said rotor having two opposing frusto-conical shapes to support the rotor in both the radial and axial directions simultaneously; said rotor further comprising a centrally disposed plurality of turbine blades; a single fluid inflow tube passing through said handle; said inflow tube of said handle being in communication with a bifurcation contained within said grip wherein one passageway is in fluid communication with a plurality of fluid ports on said cartridge for supplying fluid flow to a space between said frusto-conical shapes of said rotor and an interior conforming shape of said cartridge to create a hydrostatic bearing and a second passageway in communication with said turbine blades of said rotor, said first passageway being more direct than said second passageway; and exhaust means for fluid flow exiting said head, said exhaust means including means for balancing an upper and lower portion of said fluid flow between said frusto-conical shapes of the bearings of said rotor and the interior of said cartridge.