Patent ID: 7699813
Filing Date: 2010-04-20
Classification: A61M

Abstract:
1. A safety arrangement for a medical needle having a mount end and a sharp tip, which arrangement comprises: a support adapted directly or indirectly to carry the mount end of a needle so that the needle has a part projecting forwardly away therefrom; a sleeve mounted directly or indirectly on the support and being slideable with respect thereto from an initial position where the sleeve fully covers the projecting part of a carried needle to a retracted position where the tip of a carried needle and a part of the needle back from its tip is exposed, and then to a protecting position corresponding to the initial position and where the sleeve again covers the projecting part of the needle, said protecting position of the sleeve relative to said tip of the needle corresponding to the initial position of the sleeve relative to said tip; resilient means arranged to urge the sleeve towards its protecting position; a tubular blocking member at least a part of which projects forwardly from the support, the blocking member having a non-blocking position where the blocking member is co-axial with the sleeve whereby the sleeve is slidable with respect to the blocking member to said retracted position, and the blocking member having a blocking position where the axis of the blocking member lies at an acute angle to the sleeve and the blocking member is disposed between the support and a part of the sleeve, thereby blocking movement of the sleeve away from said protecting position; and control means for maintaining the blocking member co-axial with the sleeve during movement of the sleeve from its initial position to its retracted positions, but during movement of the sleeve from its retracted position said control means releases the blocking member for movement to its blocking position, and on subsequent movement of the sleeve to its protecting position the blocking member thereafter blocks movement of the sleeve away from its protecting position.