Safety shield system for prefilled syringes
AssigneeBecton, Dickinson and Company
InventorsHubert Jansen, Samuel Gagnieux
Life of this patent
Estimating the term…
Abstract
A medical device is provided which includes a shield system and a syringe which is coupled to the shield system. The shield system includes a syringe holder and a shield which is slidably coupled to the holder. A spring resiliently urges the shield from a retracted position to an extended position. Stop members are provided on the holder and shield for maintaining the shield in the retracted position. The syringe is slidably coupled to the holder, and extends within the shield. Axial movement of the syringe with respect to the holder causes disengagement of the stop members, allowing the spring to move the shield to the extended position. Detents are provided on the holder for maintaining the shield in the extended position.
Claims19
A medical device, comprising:
- a substantially cylindrical barrel;
- a needle connected to an end of said barrel;
- a holder defining an enclosure, said barrel extending at least partially within said enclosure and being axially movable with respect to said holder;
- a retaining member positioned on said holder and engageable with said barrel;
- a shield positioned about at least a portion of said barrel and connected to said holder, said shield being axially movable with respect to said holder between retracted and extended positions;
- a spring urging said shield towards its extended position;
- a first stop member positioned on said shield;
- a second stop member positioned on said holder and engageable with said first stop member when said shield is in its retracted position, the force of said spring being insufficient to cause disengagement of said first and second stop members;
- said barrel being operationally coupled to said shield such that sufficient axial movement of said barrel in the direction of said needle causes axial movement of said shield sufficient to cause disengagement of said first and second stop members, allowing said spring to move said shield to the extended position.
A medical device, comprising:
- a holder comprising an elongate body, an elongate enclosure defined by said body, and first and second open ends;
- a syringe including a barrel, a needle secured to said barrel, a piston slidably positioned within said barrel, and a plunger rod engaging said piston, said syringe being coupled to said holder and slidably positioned within said enclosure, said syringe being axially slidable within said enclosure;
- a shield coupled to said holder and axially movable between a retracted position wherein said needle is at least partially exposed and an extended position wherein said shield covers said needle;
- a spring urging said shield towards the extended position;
- a stop member mounted to said holder and positioned to maintain said shield in the retracted position when said syringe is in a first axial position, wherein said spring urges said shield to the extended position when said syringe is moved a sufficient distance towards said first open end of said holder.
A shield system comprising:
- a holder comprising an elongate body, an elongate enclosure defined by said body, and first and second open ends, said body further including first and second axially spaced and opposing abutment surfaces adjacent to said second open end;
- an elongate shield coupled to said holder and positioned at least partially within said enclosure, said shield including a passage extending therethrough and axially opposing openings to said passage, said shield being slidable within said enclosure between a retracted position and an extended position wherein said shield extends beyond said first open end of said holder;
- a stop member mounted to said holder and engageable with said shield, said stop member being positioned to maintain said shield in the retracted position and release said shield upon sufficient axial displacement of said shield;
- and
- a spring positioned within said enclosure and urging said shield towards the extended position.
Dependencies are inferred from the claim text.