SPRITZENVORRICHTUNG

An operable syringe assembly comprises a barrel (21) including a cylindrical coextruded body portion (22) having a longitudinal axis. The body portion (22) forms a side wall (25) spaced from the axis defining a chamber (27) for retaining fluid. The body portion (22) includes an open proximal end (28) and a distal end (29) and further includes an inner portion (31) of plastic material and a rigid portion (32) of plastic material surrounding the inner portion (31). The rigid portion (32) has a higher hardness than the inner portion (31). A plunger (40) including an elongate shaft portion (41) having a proximal end (43), a distal end (44) and a rigid piston (45) at the distal end (44) is provided. The piston (45) has an outside diameter greater than the inside diameter of the inner portion (31) and a higher hardness than the inner portion (31). The piston portion (45) is slidably positioned in fluid-tight engagement inside the barrel (21). The fluid-tight engagement is caused by the piston (45) compressing the inner portion (31) of the plastic material of the coextruded body portion (22). The proximal end (43) of the plunger (40) extends outwardly from the open proximal end (28) of the barrel (21) to facilitate moving the piston portion (45) with respect to the barrel (21).