Needle Safety device with floating ring

摘要

A needle safety device includes a sleeve having proximal and distal portions separated by a radially-inwardly projecting ledge. A ring in the proximal portion is movable between a first position spaced from the ledge, and a second position adjacent to or abutting the ledge. A shield with at least one radially deformable tab receives the syringe and is movable in the sleeve between an initial position with the tab adjacent to or abutting the ledge, an injection position with the tab spaced from the ledge, and a protection position with the tab located distally from the ledge. The tab, during movement between initial and injection positions, deforms inwardly and traverses the inner surface of the ring, and during movement between injection and protection positions, translates with the ring from the first to the second position, and subsequently deforms inwardly and traverses the inner surface of the ring and the ledge.

主权项

1. A needle safety device for a syringe having a barrel and a needle fitted to a distal end of the barrel, the device comprising:
a hollow sleeve having a proximal portion and a distal portion, the proximal portion being separated from the distal portion by a radially-inwardly projecting ledge; a ring disposed in the proximal portion of the sleeve and having an outer surface and an inner surface, the ring being movable with respect to the proximal portion of the sleeve in an axial direction between a first position wherein the ring is spaced from the projecting ledge, and a second position, wherein the ring is adjacent to or abuts the projecting ledge; a hollow shield configured to receive the syringe at least partially therein and having at least one radially deformable tab at a proximal end thereof, the shield being at least partially disposed in the sleeve and being movable in an axial direction with respect to the sleeve between an initial position wherein the at least one tab is adjacent to or abuts the projecting ledge, an injection position wherein the at least one tab is spaced from the projecting ledge, and a protection position wherein the at least one tab is located distally from the projecting ledge so that the shield covers the needle, the at least one tab being configured to:
(i) during movement between the initial position and the injection position, deform radially inwardly and traverse the inner surface of the ring in the first position,(ii) during movement between the injection position and the protection position, translate with the ring from the first position to the second position, and subsequently deform radially inwardly and traverse the inner surface of the ring and the projecting ledge.