Patent ID: 7662131

Claim:
A liquid-injection syringe assembly of the type comprising: a tubular syringe body forming a reservoir for the liquid, the body being provided with a distal end carrying a liquid-injection needle; a syringe plunger mounted to be axially movable in the body between a ready position and an end-of-injection position; and a tubular sheath in which the syringe body is mounted to be axially movable between an active position in which the needle projects from the distal end of the sheath, and a protecting position in which the needle is retracted inside the sheath; the assembly including: return means for resiliently returning the body towards its protecting position; retaining means for retaining the body in its active position relative to the sheath, opposing the resilient force of the return means; a member carried by the plunger for co-operating with the retaining means to deactivate them when the assembly is in an end-of-injection configuration; and axial securing means for securing the plunger and the sheath axially in a relative position of said plunger and said sheath serving both to position the body in its protecting position relative to the sheath, and to position the plunger in its end-of-injection position relative to the body, comprising distal securing abutment and a proximal securing abutment, carried by the sheath, between which the member is designed to be snap-fastened, so that the member is in between the distal securing abutment and the proximal securing abutment.