1976-05-06
1977-08-23
Peshock, Robert
A61C 1902
Patent
active
040430413
ABSTRACT:
A dental treatment control unit for controlling the flow of air and/or water to dental treatment instruments. The flow of air and/or water through flexible lines to selected ones of the dental instruments is regulated by line squeezing lever arms that are normally biased for squeezing the flexible lines to prevent the flow of air and/or water therethrough. The lever arms are moved in response to the operation of a foot control mechanism to unsqueeze those air and/or water lines that are connected to the selected dental treatment instruments. A foot pedal controls a closed hydraulic system which includes a hydraulic actuator which operates a piston to move the line squeezing lever arms.
Flow of air and/or water to only selected dental treatment instruments is automatically programmed by positioning the hydraulic actuator and piston adjacent the squeezing lever arm corresponding to the selected instrument. Automatic programming is provided by a positioning lever arm having the hydraulic actuator and piston attached to one end thereof and a dental instrument receptacle attached to the other end. When a given selected dental treatment instrument is removed from the receptacle, the positioning lever arm responds by moving to position the hydraulic actuator and piston adjacent the squeezing lever arm corresponding to the given selected instrument.
REFERENCES:
patent: 2711279 (1955-06-01), Day et al.
patent: 3536294 (1970-10-01), Rodriguez
patent: 3759483 (1973-09-01), Baxter
patent: 3986262 (1976-10-01), Casilles
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