Patent ID: 9604035
Date: 2017-03-28
CPC Classifications: A61M

Claim:
1. A needle assembly comprising: a support structure having a distal end and a proximal end; a needle comprising a distal piercing end, an axial bore extending therethrough, and a needle proximal portion, the needle being located in the support structure where the distal piercing end extends beyond the distal end of the support structure; a catch material within the support structure, where the needle proximal portion applies a proximal force against the catch material and the catch material prevents proximal movement of the needle until a fluid passing through the axial bore of the needle weakens the catch material to allow proximal movement of the needle which causes the distal piercing end to retract within the support structure; and where the proximal end of the support structure includes a liquid barrier to prevent leakage of the fluid passing through the axial bore of the needle from the support structure.