Cartridge and its extractor

Claim 1

An injection apparatus for discharging liquid carried within a container, said apparatus comprising: a cartridge including said container prefilled with said liquid, an injecting tube formed integrally with said container and extending in a forward, discharging direction from said container, and a projection means integrally formed with said container and extending in a rearward direction, said container being collapsible in said discharging direction; a housing for supporting said cartridge; and a piston, supported by a rearward portion of said housing, for reversible sliding motion relative to said cartridge, said piston including a forward portion including means for coupling said cartridge projection means with said piston forward end, said housing comprising a hollow portion for supporting said container, and a projection extending forwardly from said hollow portion, said projection including a bore extending therethrough for supporting the injecting tube of said cartridge, said projection including a recess disposed in the wall of said bore and extending in a direction generally normal to the discharging direction, said injecting tube having a forward portion extending forwardly and outside of said projection, and a rearward portion having convex projection extending in said generally normal direction, said injecting tube convex projection cooperating with said projection bore wall recess to secure said cartridge in a fixed position relative to said housing; wherein said housing comprises shell-like sections, and means for joining said sections, whereby the cartridge may be disposed in one of said housing sections by first inserting the cartridge rearward end into the rearward portion of said one housing section, and then placing the container and injecting tube of said cartridge in the one housing section hollow portion and projection, respectively, wherein said container comprises two receptacles each carrying a liquid, and each having an injection tube and projection means, said receptacles being disposed in parallel relationship and being joined to each other at their adjacent sides, said housing comprises three of said sections including a base section and two cover sections, said base section being disposed between said cover sections and having a hollow portion configured to support said two receptacles, and said piston comprises two parallel plungers, each of said plungers having a forward end and a rearward end, the forward end of each of said plungers being coupled with the projection means of a respective receptacle, and the rearward ends of said plungers being joined to one another, whereby movement of said piston in said discharging direction causes simultaneous discharge of the liquids from said receptacles through respective injecting tubes.