Patent ID: 7666168
Filing Date: 2010-02-23
Classification: A61M

Abstract:
1. A device for expelling a fluid through a hypodermic needle mounted on a hub, the device comprising: an adapter having a cylindrical-shaped wall surrounding a cavity, wherein the adapter defines an axis and has an open distal end and a proximal end substantially covered by a base; an elongated luer member having a proximal portion and a distal portion with a fluid conduit extending therebetween, wherein the proximal portion of the luer member is affixed to the adapter base to extend the luer member along the axis and through the adapter cavity to position the distal portion of the luer member proximate the distal end of the adapter; a cylindrical-shaped plunger positioned over the adapter and movable thereon between an advanced position and a withdrawn position to create a fluid chamber between the plunger and the adapter base when the plunger is in the withdrawn position; a tube-shaped guard having a lumen, wherein the guard is biased to extend distally from the distal portion of the luer member when the plunger is in the advanced position, and wherein the guard is selectively engageable with the plunger to be retracted into the adapter cavity and over the elongated luer member to expose the distal portion of the luer member for fluid engagement with the needle hub when the plunger is moved to the withdrawn position to create the fluid chamber and for subsequently expelling the fluid from the fluid chamber and through the needle; and a syringe body slidingly mounted on the adapter for relative axial movement thereon, the syringe body having a locking mechanism for locking the guard in an extended position to prevent reuse of the device.