Patent ID: 9302055
Filing Date: 2016-04-05
CPC Classification: A61M

Claim Text:
1. A medical device selectively attachable to a syringe having a barrel with a front end and a back end, a plunger slidably disposed inside the barrel, a fluid chamber disposed forwardly of the plunger, and a plunger handle projecting rearwardly from an opening in the back end of the barrel, the medical device comprising: a hub assembly comprising a hub disposed forwardly of the plunger, a retraction tube laterally spaced apart from the hub, and a frame member interconnecting the hub and the retraction tube in substantially fixed, laterally spaced-apart relation to each other; a nose projecting forwardly from the hub; a rearwardly biased needle retraction mechanism seated inside the nose; a retractable needle projecting forwardly of the nose; a fluid flow path from the fluid chamber through the hub, nose, needle retraction assembly and needle; wherein the barrel and hub assembly are manually rotatable by a user through an arc relative to the nose from a first position wherein hub and barrel are coaxially aligned with the needle and the needle retraction mechanism to a second position wherein the retraction tube is coaxially aligned with the needle and needle retraction mechanism to allow the retraction mechanism to force the needle rearwardly into the retraction tube so that the needle no longer projects forwardly of the nose; and wherein the frame member comprises an orifice disposed proximally to the hub and to the retraction tube, and wherein the nose comprises a rearwardly extending boss that is inserted through the orifice and snaps into rotatable engagement with the frame member.