Frontal Attachment Device For Syringe With Rotationally Activated Retractable Needle

摘要

A medical device attachable to the front of a conventional syringe and having a hub assembly selectively attachable to the syringe, a nose projecting forwardly from the hub assembly, a rearwardly biased needle retraction mechanism seated inside the nose, a retractable needle projecting forwardly of the nose, and a fluid flow path from the fluid chamber through the hub assembly, nose, needle retraction assembly and needle, wherein the needle is retracted into the nose and a retraction tube external to the syringe by rotating the syringe relative to the nose.

主权项

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 nose is rotatably attached to the hub assembly along an axis of rotation that is parallel to and offset from both a first longitudinal axis through the hub and the retractable needle, and is also parallel to and offset from a second longitudinal axis through the retraction tube.