Oral syringe

Claim 1

An oral hydrotherapeutic syringe for delivering a fluid carrier stream to the teeth for effecting the cleaning thereof and for massaging the gums, the combination comprising: a syringe having a central body portion; a handle detachably connected to said body portion and provided with a mixing chamber for storing a quantity of mouthwash; a nozzle detachably connected to said body portion for discharging said main carrier stream; an attachment portion including an inlet chamber coupled to a source of pressurized fluid constituting said main carrier stream; a control mechanism operably carried on said central body portion between said nozzle, said mixing chamber and said inlet chamber for selectively conducting said main carrier stream therebetween; said control mechanism including a valve means responsive to manual depression for interconnecting said inlet chamber to said nozzle for discharge of said main carrier stream and responsive to rotation thereof in cooperation with axial rectilinear displacement of said valve means to interconnect said mixing chamber with said nozzle simultaneously with said interconnected inlet chamber for a combined discharge of said mouthwash with said main carrier stream; said valve means includes an elongated spindle mounted for rectilinear and rotary movement on said central body portion; at least three seals carried on said spindle is fixed spaced apart relationship so as to define a pair of annular fluid conducting chambers between adjacent seals; a first chamber of said pair operable in response to a first depression of said valve means to interconnect said inlet chamber with said nozzle and said mixing chamber; a second chamber of said pair operable in response to simultaneous rotation and a second further depression of said valve means to interconnect said mixing chamber with said nozzle simultaneously with said interconnection between said inlet chamber and said nozzle via said first chamber; stop means limiting said rectilinear movement of said valve means; said stop means includes a projection carried on one end of said spindle releasably engageable with a lip provided on said central body portion so as to prevent depression of said valve means beyond said intercommunication of said inlet chamber with said mixing chamber and said nozzle; said stop means further includes interference of a selected one of said seals with said central body portion to arrest movement of said valve means so as to close communication between said inlet chamber with said mixing chamber and said nozzle; spring biasing means yieldably urging said selected seal into engagement with said central body portion; and indicia displayed on said central body portion for mixing and no-mixing; and said valve means having a pushbutton carried on said spindle incorporating a pointer operable with said indicia to visually display the rotational position of said valve means.