Patent ID: 8491535
Filing Date: 2013-07-23
Classification: A61M

Abstract:
1. A safety pen needle assembly comprising: a hub having a tubular side wall defining a lumen with an inner lumenal surface and an outer ablumenal surface, a transverse wall extending transversely from said side wall to overlap at least a portion of said lumen; a needle fixed to said transverse wall, said needle having a distal end, formed for insertion into a patient, and a proximal end; and, a shield having a shield side wall extending between proximal and distal ends, said shield side wall being formed to at least partially telescope over said hub, said shield side wall defining a shield lumen with an inner shield lumenal surface, wherein, said ablumenal surface and said shield lumenal surface being formed with cooperating thread elements to permit relative rotation between said hub and said shield, wherein, in an initial state, said cooperating thread elements being in threaded engagement with said shield being positioned relative to said hub with said distal end of said shield side wall being located distally of said distal end of said needle, and, wherein, in said initial state, said shield and said hub being configured with a rotation-resistance arrangement which inhibits relative rotation between said hub and said shield, said rotation-resistance arrangement being surmountable to allow relative rotation between said hub and said shield with an at least threshold amount of torque being applied therebetween, said threshold amount of torque being greater than required to mount said safety pen needle assembly onto an injector body.