Patent ID: 8932264
Filing Date: 2015-01-13
Classification: A61M

Abstract:
1. A medication delivery pen assembly comprising: a pen body adapted to receive a medicinal container inside the pen body; and a needle assembly having a hub mounted to the pen body; the hub comprising a cavity defined by a wall having an interior surface with features defined thereon for mounting the pen body, the hub further comprising, complementary ribs and grooves extending longitudinally along the hub and the shield preventing relative rotation between the hub and the shield; wherein said shield is axially displaceable along said hub distally from a first position, where the shield is releasably held against the hub in an interference fit, and where said distal end of said needle cannula is exposed, to a locked and extended second position, where said distal end of said needle cannula is enclosed by said shield, and wherein, upon said shield being displaced to said second position, a portion of the first inclined surface of said second projection resiliently presses against and is deflectibly urged past a portion of the first inclined engagement surface of said first projection into an expanded state so that distal-to-proximal movement of said shield relative to said hub is hindered by interengagement of a portion of the second inclined surface of said second projection and a portion of the second inclined engagement surface of said first projection.