Patent ID: 7980424

Claim:
A fluid transfer device for dispensing flowable material from a container by piercing, comprising: (A) a hollow body, said hollow body having: (a) a longitudinal axis, (b) a through internal passage, (c) a piercing end, and (d) a dispensing end wherein said dispensing end is adapted to receive a dispensing tube; wherein said piercing end has a peripheral extremity that is tapered in relation to said longitudinal axis of said hollow body; wherein said piercing end also has a leading tooth that is located at a distal extrema of said peripheral extremity so as to initiate piercing and wherein said leading tooth comprises an exterior surface substantially parallel to said longitudinal axis of said hollow body and an interior surface inclined inwardly and forming an angle of 10° to 45° with said exterior surface and wherein said piercing end further comprises a plurality of additional teeth disposed around said peripheral extremity.