Patent ID: 7413560
Filing Date: 2008-08-19
Classification: A61M

Abstract:
1. A winged safety needle assembly, comprising: a hub having a distal end, a proximal end, and an axial through hole, said hub further supporting a pair of flexible extension arms, said pair of flexible extension arms each having a shoulder that extends from said hub at approximately a center of said hub, said pair of flexible extension arms extending toward the distal end of the hub; a cannula joined to said hub adjacent the distal end of said hub, said cannula having a beveled edge at a distal end thereof; a cylindrical sheath having a locking tab attached to an outer surface thereof by a hinge, said locking tab being rotatable over at least a 180 degree arc, said cylindrical sheath retaining said hub therein and having a distal end and a proximal end, said hub being slideable along an inner surface of said cylindrical sheath from a first position at which the distal end of said cannula joined to said hub projects beyond the distal end of said cylindrical sheath by a predetermined length, to a second position at which said distal end of the cannula is protectively contained within said cylindrical sheath; a pair of flexible wings provided on the outer peripheral surface adjacent the distal end of said cylindrical sheath; and a first locking mechanism and a second locking mechanism disposed on said assembly, said first locking mechanism releasably locking said hub and said cylindrical sheath at the first position, and said second locking mechanism unreleasably locking said hub and said cylindrical sheath at the second position, wherein said first locking mechanism comprises said pair of flexible extension arms supported by said hub and a groove formed on the inner surface of the distal end of said cylindrical sheath in combination with said locking tab and a slot in the cylindrical sheath, and when said hub is locked at the first position in relation to said cylindrical sheath a pair of tips of said pair of flexible extension arms releasably engages the groove, and said locking tab includes an arc shaped projection that is inserted through the slot in the cylindrical sheath to directly engage the shoulders of the pair of flexible extension arms, said arc shaped projection having an arc length that extends over a 180 degree arc.