Dental polisher combining pressurized fluid and abrasive flow

Claim 1

A dental polisher combining pressurized fluid and an abrasive flow for application to the teeth of a patient during performance of a cleaning function, said polisher capable of attaching with a standard supply fitting, comprising, a body means having a length to be conveniently grasped and held by the hand during application of the polisher, said body means having a pair of conduits therethrough, one conduit being a fluid conveying conduit, and the other being an abrasive conveying conduit, a delivery nozzle provided forwardly of the body means, connecting therewith, and useful during application for separately discharging the fluid and abrasive while providing for their convergence forwardly of the nozzle and into a combined flow, a supply housing means provided rearwardly of the body means and incorporating a pair of additional conduits for accommodating separate flows of the fluid and abrasive and each communicating with the respective conduits provided through the body means, a reservoir connecting with the housing means and provided for holding a supply of abrasive, the said abrasive conduit through the housing means formed into two flow lines, one of said flow lines at one end communicating with the interior of the reservoir, and at its other end opening for attaching with the supply fitting, the other flow line at one end also communicating with the interior of the reservoir and at its other end opening for communication with the abrasive conveying conduit provided through the body means, wherein air under pressure traversing said abrasive conduits entraining said reservoired abrasive for conduct through and discharge from the said delivery nozzle, said delivery nozzle having a series of discharge ports therethrough, one of said discharge ports being centrally disposed and communicating with the abrasive conveying conduits and provided for releasing a stream of the pressurized air entrained abrasive, and a series of additional fluid discharge ports surrounding said central port, and communicating with the fluid conveying conduits and providing for release of a series of streams of fluid substantially surrounding the discharged abrasive stream, and wherein said abrasive discharge port of the nozzle extending further forwardly than the fluid discharge ports of the same nozzle.