Quick shot single barrel dispensing system

Claim 1

A syringe dispensing system comprising: housing means for containing at least two sealed bags of a compound to be dispensed; nozzle means, in fluid communication with said housing means, for providing an outlet from the housing means for the compound; a shaft disposed within said housing means; handle means, attached to said shaft, for moving the shaft longitudinally within the housing means; bag rupturing means, attached to said shaft, for piercing said bag upon movement of said shaft in one direction, said bag rupturing means comprising a plurality of pointed projections on a plate, said pointed projections extending in a direction, from the plate, opposite the nozzle means; mixing means, attached to said shaft, comprising a plurality of apertures in said plate, for mixing the compounds in the at least two bags after rupture thereof by the bag rupturing means; rupturable membrane means, disposed between said bag rupturing means and said nozzle means, for preventing premature dispensing of the compound through the nozzle means; piston means for forcing said compound out of said housing means, through said nozzle means, upon movement of said shaft in an opposite direction, said piston means comprising a circular disk having means, defining a plurality of depressions thereon, for receiving the pointed projections, in order to enable the bag rupturing means and piston means to nest together when the bag rupturing means and piston means are engaged with one another; and latch means for engaging said bag rupturing means with said piston means, in a nested arrangement, for movement together with said shaft in the opposite direction.