Hypodermic syringe for blood tests

Claim 1

A syringe assembly for drawing blood samples, said assembly comprising: A. an open-ended cylindrical tube of transparent material, B. a needle-pierceable closure secured to one end of said tube, said closure being formed of self-sealing material and having a coupling shoulder attached to said end of said tube, a constricted neck extending from said shoulder and having an internal chamber communicating through a passage in said shoulder with said tube and a bulbous head extending from the neck, C. a piston slidable in said tube from an initial position abutting said coupling shoulder and blocking the passage therein to seal said chamber to a final position adjacent the other end of said tube, D. a stem telescoping in said tube and terminating in a handle outside of said tube at said other end of said tube, said stem being coupled to said piston and being detachable therefrom whereby after said piston is pulled by said handle to said final position drawing a desired amount of blood in said tube, said stem may be detached from said piston which then serves as a stopper, and E. an applicator frictionally engaging said closure for filling said tube with a blood sample and being removable therefrom when the filled tube is to be transmitted, said applicator having a U-shaped yoke engaging said neck of said closure laterally, said applicator being provided with an L-shaped, double-pointed needle whose junction is secured to said yoke, said needle having a lateral arm which penetrates said neck to enter said chamber and a longitudinal arm for injection.