A

Dental apparatus, namely, delivery systems comprised of air and water conduits and valves for controlling the supply of air and water to dental handpieces and implements; saliva ejectors; medical syringes; dental examination chairs and apparatus for controlling the same, namely, foot operated controls for dental examination chairs; dental stools; dental lights; dental cuspidors; self-contained water supply apparatus, namely, vessel for containing water and hoses for conveying the water to dental handpieces and medical syringes; portable self-contained dental units, namely, delivery system comprised of self-contained water supply unit and apparatus for the control of flow of air and water to dental handpieces and syringes, instrument holders, syringe, instrument tray, and mobile frame for supporting the same; [ warm water heaters with heated syringe tubing for dental use; ] chair-mounted delivery systems for use by dental assistants comprised of apparatus for controlling the flow of air and water to dental handpieces and implements and support arms therefor; and oral evacuators for removing particles from oral cavity