Patent ID: 7429256

Claim:
An assembly comprising a safety support device for a syringe and a syringe having a body presenting a collar, a piston, and a needle, the device comprising a support sheath for the syringe body and safety means comprising an inner sheath capable of sliding relative to the support sheath between a waiting, retracted position in which the inner sheath is substantially retracted inside the support sheath and is suitable for being placed around at least an end portion of the syringe body carrying the needle, and a protective, extended position in which the inner sheath projects beyond the support sheath to provide protection around the needle, the device further comprising retaining means suitable for being activated to retain the inner sheath in the waiting, retracted position inside the support sheath and for being deactivated to allow the inner sheath to be extended under drive from a thrust means, wherein the retaining means comprise resilient tongues and retaining surfaces, said tongues being integral with the inner sheath, said retaining surfaces formed on an inner periphery of the support sheath, the tongues being retained on the retaining surfaces in their active, retaining configuration, and being suitable for being moved resiliently towards their inactive configuration in which they escape from said surfaces, wherein the resilient tongues are oriented substantially axially, and co-operate in their active configuration with said retaining surfaces, and wherein the resilient tongues present free ends which extend through passages formed between the collar of the body of the syringe and the inner periphery of the support sheath, and wherein the piston of the syringe further comprises an actuation head suitable for cooperating with the free ends of the tongues to urge the tongues towards their inactive position, the collar being held motionless against an abutment so as to maintain the syringe body fixed inside said support sheath, and the retaining means being suitable for being activated as a function of the position of the piston of the syringe, while the body of the syringe remains fixed inside the support sheath.