Safety shield system for syringes
First Claim
1. An injection device, comprising:
- a generally cylindrical tubular barrel including a first end having a needle cannula having a sharp distal end and a second open end having a radial flange adjacent said second open end;
a tubular holder surrounding said barrel including a first open end adjacent said first end of said barrel spaced from said sharp distal end of said needle cannula and a second open end having a chamber receiving said flange of said barrel, said chamber having an abutment surface facing said flange of said barrel;
a tubular shield releaseably retained by said holder located within said holder surrounding at least a portion of said barrel including a first open end and a second open end, said tubular shield axially moveable with respect to said barrel between a retracted position, wherein said sharp distal end of said needle cannula is exposed, to an extended position, wherein said sharp distal end of said needle cannula is enclosed by said shield;
a fitting within said tubular holder having a tubular portion surrounding said tubular shield and a radial flange portion located within said chamber of said tubular holder between said flange of said barrel and said abutment surface of said chamber having at least one resiliently deformable projection extending toward said abutment surface;
and a spring operably biased between said shield and said holder urging said shield from said retracted position toward said extended position when said shield is released from said tubular holder, whereby said resiliently deformable projection on said flange portion of said fitting damps movement of said flange of said barrel in said chamber, reducing damage to said flange of said barrel.
1 Assignment
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Accused Products
Abstract
A medical injection device including a shield system and a syringe coupled to the shield system. The shield system includes a syringe holder, a shield telescopically received in the holder and slidably coupled to the holder and an end fitting which isolates the syringe flange from the holder, preventing damage to the flange. A spring resiliently urges the shield from a retracted position to an extended position. Stop members are provided adjacent the distal end of the holder and the proximal end of the 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.
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Citations
21 Claims
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1. An injection device, comprising:
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a generally cylindrical tubular barrel including a first end having a needle cannula having a sharp distal end and a second open end having a radial flange adjacent said second open end;
a tubular holder surrounding said barrel including a first open end adjacent said first end of said barrel spaced from said sharp distal end of said needle cannula and a second open end having a chamber receiving said flange of said barrel, said chamber having an abutment surface facing said flange of said barrel;
a tubular shield releaseably retained by said holder located within said holder surrounding at least a portion of said barrel including a first open end and a second open end, said tubular shield axially moveable with respect to said barrel between a retracted position, wherein said sharp distal end of said needle cannula is exposed, to an extended position, wherein said sharp distal end of said needle cannula is enclosed by said shield;
a fitting within said tubular holder having a tubular portion surrounding said tubular shield and a radial flange portion located within said chamber of said tubular holder between said flange of said barrel and said abutment surface of said chamber having at least one resiliently deformable projection extending toward said abutment surface;
and a spring operably biased between said shield and said holder urging said shield from said retracted position toward said extended position when said shield is released from said tubular holder, whereby said resiliently deformable projection on said flange portion of said fitting damps movement of said flange of said barrel in said chamber, reducing damage to said flange of said barrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An injection device, comprising:
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a generally cylindrical tubular barrel formed of glass including a first reduced diameter end portion having a needle cannula attached thereto having a sharp distal end and a second open end having an integral radial flange adjacent said second open end;
a stopper located in said barrel telescopically moveable through said barrel and a plunger attached to said stopper extending through said second open end of said barrel;
a tubular holder surrounding said barrel including a first open end adjacent said first open end of said barrel and a second open end having a chamber receiving said flange of said barrel, said chamber having an abutment surfaces on opposed sides of said flange of said barrel;
a tubular shield located within said tubular holder surrounding at least a portion of said barrel releaseably retained by said holder including a first open end and a second open end, said tubular shield axially moveable with respect to said barrel between a retracted position, wherein said sharp distal end of said needle cannula is exposed, to an extended position, wherein said sharp distal end of said needle cannula is enclosed by said shield;
a fitting located within said tubular holder including a tubular portion surrounding said tubular shield and a radial flange portion located within said chamber of said holder between said flange of said tubular barrel and one of said abutment surfaces of said chamber, wherein said flange portion of said fitting includes at least one resiliently deformable projection extending toward one of said abutment surfaces of said chamber; and
a coil spring surrounding said tubular shield adjacent said second end resiliently biased between said shield and said flange portion of said fitting urging said shield from said retracted position toward said extending position when said shield is released, whereby said resiliently deformable projection on said flange portion of said fitting damps movement of said flange of said barrel in said chamber, reducing damage to said flange of said barrel. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 20, 21)
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19. An injection device, comprising:
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a generally cylindrical tubular barrel including a reduced diameter first open end having a needle cannula secured thereto having a sharp distal end and a second open end having a radial flange adjacent said second open end;
a tubular holder surrounding said barrel including a first open end adjacent said first open end of said barrel and a second open end having a chamber therein receiving said flange of said barrel, said chamber having opposed first and second abutment surfaces, wherein said first abutment surface faces said flange of said barrel;
a tubular shield located within said tubular holder surrounding at least a portion of said barrel releaseably retained by said holder including a first open end and a second open end, said tubular shield axially moveable with respect to said barrel between a retracted position, wherein said needle cannula is exposed, to an extended position, wherein said needle cannula is enclosed by said shield;
a fitting within said tubular holder having a flange portion located within said chamber of said tubular holder between said flange of said barrel and said first abutment surface including a plurality of resiliently deformable projections circumferentially spaced around said flange portion; and
a spring resiliently biased between said shield and said fitting biasing said flange of said barrel against said second abutment surface of said chamber when said shield is in said retracted position, whereby said resilient projections damp movement of said flange of said barrel in said chamber, reducing damage to said flange, when said shield is extended to said extended position.
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Specification