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 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.
A medical device, comprising:
- a tubular barrel having an open proximal end;
- a needle connected to a distal end of said barrel;
- a piston slideable within said barrel having a plunger extending through said open proximal end of said tubular barrel;
- a tubular holder generally surrounding said tubular barrel and retained to said tubular barrel adjacent said open proximal end of said tubular barrel;
- a tubular shield at least partially located within said tubular holder surrounding said tubular barrel and extendable axially from a retracted position to an extended position surrounding said needle;
- a spring operatively biased between said tubular barrel and said tubular shield urging said tubular shield toward said extended position;
- and
- said tubular holder including a first internal stop and a second internal stop spaced axially from said first internal stop, and said tubular shield including an external stop engaging said first internal stop of said tubular holder in said retracted position and said second internal stop of said tubular holder in said extended position.
A medical device, comprising:
- a tubular barrel including and open proximal end a radial flange portion surrounding said open proximal end;
- a needle connected to a distal end of said tubular barrel in fluid communication with an interior of said tubular barrel;
- a tubular holder generally surrounding said tubular barrel including an open distal end and an open proximal end having spaced internal radial surfaces receiving said flange portion of said tubular barrel therebetween and retaining said tubular barrel within said tubular holder;
- a tubular shield at least partially located within said tubular holder surrounding said tubular barrel extendable axially from a retracted position wherein said needle is exposed to an extended position surrounding said needle;
- a spring biasing said tubular shield toward said extended position;
- and
- said tubular holder including first and second stop members with said second stop member spaced axially from said first stop member, and said tubular shield including a third stop member with said third stop member of said tubular shield engaging said first stop member of said tubular holder in said retracted position of said tubular shield and said third stop member of said tubular shield engaging said second stop member of said tubular holder in said extended position.
Dependencies are inferred from the claim text.