Patent ID: 9623194
Date: 2017-04-18
CPC Classifications: A61M

Claim:
1. A safety pen needle assembly comprising: a hub having a proximal end and a distal end and a cross piece between said proximal end and said distal end forming one or more openings through the cross piece; a needle fixed to said hub, said needle having a distal end, formed for insertion into a patient, and a proximal end, said needle extending distally from said distal end of said hub so as to define an injection length of said needle between said distal end of said needle and said distal end of said hub; a first shield slidable relative to said hub from a first state, in which said first shield covers at least a substantial portion of said injection length of said needle, to a second state, in which at least a substantial portion of said injection length of said needle is exposed; a second shield slidable relative to said hub from a first position, in which said shield covers said proximal end of said needle, to a second position, in which said proximal end of said needle is exposed, said second shield having a base positioned on a distal side of said cross piece, said base having one or more shield members extending proximally from said base through said one or more openings in said cross piece, and one or more locking arms extending from a distal side of said base, said one or more locking arms configured to mate with said hub to retain said second shield in said second position; and, a biasing means disposed between said first and second shields configured to simultaneously generate a biasing force configured to urge said first shield distally towards said first state and to generate a biasing force configured to urge said second shield proximally towards said first position.