Patent ID: 7354422

Claim:
A hypodermic needle assembly comprising a needle hub comprising an inner needle assembly comprising a needle having a needle tip attached thereto; a triggering portion extending from the inner needle assembly comprising a latching section; a pressure fitting comprising a flange and at least one arm extending away from a first side of the flange, wherein the at least one arm comprises a mating latching section, a trigger ring coaxially disposed with the needle hub comprising an extending trigger member extending from the trigger ring; and a resilient member in a compressed configuration on the first side of the flange and coaxial with the needle; wherein the mating latching section is snapped fit with the latching section of the triggering portion, and wherein the extending trigger member of the trigger ring contacts a portion of the pressure fitting such that when the trigger ring is rotated relative to the needle hub, the extending trigger member rotates the pressure fitting to unsnap the mating latching section from the latching section to release the compression on the resilient member.