Connecting device for medical liquid containers

A connection assembly comprising:

• a medical liquid container;
• a tubular port member extending from the container, said tubular port member including a flange member disposed about its distal end;
• a pierceable diaphragm positioned within and sealing said tubular port member;
• a hollow tubular piercing pin connected at its proximal end to a length of flexible tubing and having a sharpened tip at its distal end adapted for penetration of said pierceable diaphragm member;
• locking means for the selective retention of said piercing pin within said tubular port member;
• said locking means comprising a clasp member including first and second substantially C-shaped body portions hingedly connected to each other and further including latching means at opposing sides thereof, said clasp member being constructed and arranged for telescopic attachment to said tubular port;
• a plurality of protruding frictional engagement means integrally formed and disposed within said clasp member proximate the distal end thereof, said protruding frictional engagement means being constructed and arranged for securing said clasp member on said port following said telescopic attachment;
• and
• additional engagement means defined by a flange member extending from said piercing pin and a wall surface positioned within said clasp member to limit longitudinal movement of said piercing pin in either direction.