Safety assembly for a syringe

摘要

A safety support device for a syringe comprises a support sheath for the body of the syringe and an inner sheath suitable for sliding relative to the support sheath between a waiting, retracted position and the extended position for protecting the needle of the syringe. The device has means for holding the syringe body relative to the support sheath and retaining means suitable for being activated to retain g the inner sheath in the waiting, retracted position inside the support sheath and for being deactivated by the piston of the syringe to allow the inner sheath to extend into its protective, extended position.

主权项

1. A safety syringe support system comprising,
a) a first rigid sheath having a proximal end opposite a distal front end; b) a second rigid sheath having a proximal end opposite a distal front end; c) a pre-stressed spring biasing the first and second sheaths to move independently and relative to each other, where the pre-stressed spring has a loaded position and an unloaded position; d) an abutment surface at the proximal end of the first sheath; and e) at least two resilient tongues extending axially and proximally from the proximal end of the second sheath and in snap fit engagement with the abutment surface, where the two resilient tongues are configured to flex radially disengaging from the abutment surface and allowing the pre-stressed spring to unload and to move one sheath relative to other sheath, wherein the first sheath and the second sheath are non-collapsible and form overlapping concentric tubes when the pre-stressed spring is in both the loaded and unloaded positions and neither sheath comprises a syringe body, and wherein one of the two sheaths is configured to engage and hold a syringe body inside the sheath when the syringe body is inserted into the sheath from the proximal end such that the syringe body is surrounded by the sheath.