Patent ID: RE39107

Claim:
A cap operated retractable medical device combination comprising: a long thin walled tubular outer body having a back end with an opening and a front end which incorporates a centered hub; an elongated movable member closely fitting entirely within the outer body, the movable member having a back end with an opening and a front end and front portion wherein the front portion has a radially enlarged inner surface and an outer surface; a retraction body having a laterally extending wall with an outwardly facing edge, releasably held at a forward position with respect to the movable member by means of the radially enlarged inner surface of the front portion of the movable member; the movable member being held in position with the retraction body adjacent the hub of the outer body by means of a tight area created between the outer surface of the front portion of the movable member and the inside surface of the wall of the outer body near its front end; a cap hinged at the back end of the outer body and selectively movable between an open position and a closed position relative to the opening at the back end of the outer body, said cap having a cam surface confined to engage the back end of the movable member inside the outer body and move it forward as the cap is moved to the closed position; and whereby closing the cap causes the movable member to move forward while the retraction body is restrained by the hub in the outer body thereby releasing the retraction body from the movable member.