Patent ID: 9272100
Filing Date: 2016-03-01
CPC Classification: A61M

Claim Text:
1. A pen needle assembly, comprising: a hub adapted to receive a medication pen body having a medication compartment therein; a needle cannula affixed to the hub having a distal end extending from the distal end of the hub and a proximal end adapted to access the medication compartment in the pen body; a first passive shield with a distal end at or proximal of the distal end of the hub in an initial position arranged on the hub and encircling the needle cannula; a biasing member biasing the first passive shield to a distal position covering the needle cannula after injection; an outer sleeve attached to the hub having a distal end encircling the first passive shield and the hub; an outer shield radially outward of the first passive shield and radially inward of said outer sleeve, said outer shield covering the needle cannula in an initial state prior to use; the outer shield having a retaining feature retaining the first passive shield in the initial position and not engaging the first passive shield radially, wherein rotating movement of the outer shield frees the first passive shield from the retaining feature so that the first passive shield moves distally under urging of the biasing member to cover the needle cannula in an after-use position; and wherein the distal end of the hub extends beyond the distal end of the outer sleeve, and the distance between the distal tip of the needle and the distal end of the hub is the effective penetration depth of the needle.