Compagnie Plastic Omnium

Rexam Healthcare La Verpilliere

Michel Pouget

Thierry Rimlinger

Philippe Dodier

Fabrice Bonacci

Thierry Peysson

The invention relates to a safety device () for a syringe (), the device comprising a protective sheath () in which the syringe () can slide, said sheath () presenting an opening () at a distal portion (), which opening is suitable for allowing the syringe () to project beyond the sheath (). According to the invention, the sheath () presents radial resilience at its distal portion () suitable for enabling the sheath () to receive a cylinder () of diameter greater than that of said opening ().

Safety device for a syringe

The assembly comprises a body forming a reservoir for the liquid, the body being provided with a liquid-injection needle, a plunger mounted to be axially movable in the body between a ready position and an end-of-injection position, and a sheath in which the body is mounted to be axially movable between an active position in which the needle projects from a distal end of the sheath, and a protecting position in which the needle is retracted inside the sheath. The assembly also comprises means for axially securing the plunger and the sheath in a relative position of said plunger and said sheath serving firstly to position the body in its protecting position relative to the sheath and secondly to position the plunger in its end-of-injection position relative to the body.

Liquid-injection syringe assembly, and a sheath for the assembly

The present invention relates to a safety device () for a prefilled syringe (), the syringe comprising a body (), a needle carrier (), a piston () movable inside the body, and a piston rod () suitable for pushing the piston inside the body towards the needle carrier. The device comprises a protective sheath () in which the syringe body can slide between an injection position and a safe position in which the needle is withdrawn inside the sheath, said device () comprising a resilient element () suitable for acting on the syringe to bring in into its safe position after injection, said resilient element presenting two axial ends and comprising at least two elastically-deformable arms extending between said two axial ends, one of the ends () being arranged so as to be capable of sliding freely relative to the piston rod () prior to injection, and/or one of the ends being arranged in such a manner as to be capable of being fixed to the protective sheath () in a position of adjustable height.

Security device for a syringe

A safety device for a syringe constituted by a body, a needle carrier mounted at one end of the body, a piston that is axially movable in the body, and a piston plunger projecting from the body at its end opposite from the needle carrier and suitable for pushing the piston inside the body towards the needle carrier, the device comprising a sheath in which the syringe body can slide axially between an injection position in which the needle carrier is flush with one end of the sheath and a safe position in which the needle carrier is retracted into the sheath, a helical spring which is axially compressed when the syringe body is in the injection position, said spring then exerting on said body a force tending to cause it to slide into the safe position, retention means for retaining the syringe body in the injection position, and a release mechanism for releasing the retention means acting on said retention means when the piston plunger of the syringe has pushed the piston inside the body into the vicinity of the needle carrier, wherein the retention means for retaining the body of the syringe in the injection position in the sheath are constituted by at least one radially-movable resilient tab extending substantially longitudinally relative to the sheath and arranged to hold the spring in the compressed state even when the syringe body is not in the sheath.

Safety device for an injection syringe

Safety device for a syringe is constituted by a body, a needle carrier, a piston, and a piston plunger. The device includes a sheath and a body. The syringe body may slide axially inside the sheath between an injection position and a safe position. A return member urges the syringe body towards the safe position, and may be triggered automatically when the piston plunger is pushed into the body. A telescopic head is capable of taking up a retracted position and an extended position. A combination for locking the telescopic head in the extended position may be constituted by a combination of two oppositely-directed axial bearing surfaces bearing against two oppositely-directed axial bearing surfaces of the sheath, and two oppositely-directed lateral bearing surfaces which bear against two oppositely-directed lateral bearing surfaces of the sheath.

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Domarin, France

Michel Pouget