Patent
1974-02-19
1976-10-19
Peshock, Robert
A61C 1902
Patent
active
039862623
ABSTRACT:
A control unit is provided for a plurality of dental handpieces of the electrically energized type, which includes individual arms for supporting the handpieces, and which selectively directs the flow of pressurized air to the handpieces, so that high pressure driving air may be supplied to a selected handpiece as it is removed from its supporting arm. The air pressure is controlled by a common controller which may be of the usual foot operated type in general use in most dental offices, so that the speed of the selected handpiece may be controlled. The unit includes a pressure-sensitive electrical impedance of each of the electrical handpieces which responds to the pressurized air from the controller as the corresponding electrical handpiece is selected to control the flow of electrical energy to the selected handpiece.
REFERENCES:
patent: 3568318 (1971-03-01), Martin
patent: 3676931 (1972-07-01), Pietschmann
patent: 3844039 (1974-10-01), Fleer et al.
patent: 3902247 (1975-09-01), Fleer et al.
Beecher Keith D.
Peshock Robert
Progressive Machine Products, Inc.
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