Abstract: A mixing and dispensing syringe having a single mixing cylinder loadable at one end with a plurality of different materials to be blended and mixed by static devices, a dispensing nozzel on the opposite end of said cylinder, a piston-like unit axially movable in the cylinder between opposite ends thereof by means of a manually-operable member connected to one end of the unit, whereby, when the unit is positioned nearest the nozzle in the cylinder and the cylinder is loaded with the materials to be mixed, movement of the unit toward the loadable end of the cylinder causes the materials to pass through a mixing device in the unit and into a common chamber or barrel of the syringe to effect partial mixing and when the unit next is moved toward the nozzle by the manual member, the partially mixed materials then pass through the static mixing device in the nozzle and are further mixed incident to being discharged from the syringe.

Abstract: A multiple, metered dosage device having an elongated body provided adjacent one end with a compartment or an ampule to contain material to be dispensed, a piston movable against the material to discharge it from a nozzle, a rod-like plunger movable by a pressure device against the piston to discharge material and a combination stop and release unit movable intermediately of the ends of the body between depressed and elevated positions respectively to engage a pair of racks of teeth on the plunger and including first and second teeth respectively engageable with the racks of teeth sequentially to permit the pressure device to advance the plunger and piston in similar metered, precise or predetermined increments of feeding in discharge direction and then stop the feeding movement and maintain such stopped position until the stop and release unit next is depressed.