US 6,616,639 B2 · Safety shield system for syringes

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.

Drawings

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Drawings

Claims21

Dependent claims

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.

2 more elements

An injection device, comprising:

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.

4 more elements

An injection device, comprising:

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.

3 more elements

Dependencies are inferred from the claim text.

Description4,807 words

Summary1,637 words

#1. Field of the Invention

#The field of the invention relates to shield systems for protecting against needle sticks, and syringes including such systems.

#2. Brief Description of the Related Art

Brief description of the drawings10 figures

#FIG. 1 is a top perspective view of a preferred embodiment of the medical device according to the invention as assembled;

#FIG. 2 is an exploded, perspective view thereof;

#FIG. 3 is a sectional elevation view thereof;

Detailed description2,991 words

#An injection device 10 for injecting a medicament, drug or vaccine into a patient is shown in FIGS. 1-8. The device comprises a prefilled or prefillable syringe 12 and a shield assembly coupled to the syringe.

#Syringes are ordinarily comprised of a tubular, generally cylindrical portion 16, known as a barrel, a needle cannula 18 or other piercing element or a connecting element secured to one end of the barrel, and a piston or stopper 20 slidably positioned within the barrel. The needle cannula may be removably secured to the barrel, but is more likely to be permanently secured to the barrel when the barrel is comprised of glass. Glass barrels are commonly used in prefillable syringes, and ordinarily contain a single dose of medication. Prefilled syringes made from plastic are also known to the art. Referring to FIG. 2, the shield system disclosed herein is employed in conjunction with a prefillable syringe 12 including a barrel 16, a cannula such as a needle 18 permanently secured to the barrel, a stopper 20 slidably positioned with the barrel, and a plunger rod 22 engageable with the stopper. The syringe barrel 16 includes a radially outwardly extending integral flange 24, which is normally grasped by the healthcare worker or patient but is used to couple the syringe to the shield system of this invention.

#The shield system 14 according to this invention includes a tubular holder 26, a tubular shield 28 coupled to the holder, a coil spring 30 and an end fitting 32 which engages one end of the spring. With the exception of the spring 30 and the fitting 32, all of the components of the shield system may be made from a semi-rigid plastic material, such as polypropylene. The spring is preferably a metal coil spring. The fitting is preferably formed of a resilient polymer, such as a thermoplastic elastomer, rubber, synthetic rubber or a rubber blend.

Facts

Application

10/131,363Filed 24 Apr 2002 · continuation

Priority

17 Apr 1998

Published

US 2002/0004649 A124 Oct 2002

Granted

9 Sep 2003

Term ended

12 Apr 2019

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification6 codes

A61M 5/326
Being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel: fully automatic sleeve extension, i.e. in which…
A61M 5/3129
Details: syringe barrels
A61M 5/3135
Syringe barrels: characterised by constructional features of the proximal end
A61M 2005/3247
Constructional features thereof, e.g. to improve manipulation or functioning: means to impede repositioning of protection sleeve from needle…

Family

Application60/082,221Us provisional application · filed 17 Apr 1998

Application09/290,786Parent of this continuation-in-part · filed 12 Apr 1999

Application09/838,032Parent of this continuation-in-part · filed 19 Apr 2001

Application09/876,710Parent of this continuation · filed 7 Jun 2001

Application09/885,815Parent of this continuation · filed 20 Jun 2001

US 2002/0156426 A1Pre-grant publication · published 24 Oct 2002

Application09/885,815Parent of this continuation

Application09/876,710Parent of this continuation-in-part

Application09/838,032Parent of this continuation-in-part

US 6,319,233 B1Parent of this continuation-in-part

US 2002/0004649 A1Published application

US 2003/0050607 A1Published application

US 6,679,864 B2Related patent

US 6,719,730 B2Related patent

US 6,616,639 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

17 Apr 1998Priority claimedParent application 60/082,221
24 Apr 2002Application filedUS 10/131,363
14 Jun 2002Assigned to Becton Dickinson and Companyassignment of assignor's interest
24 Oct 2002PublishedUS 2002/0004649 A1
9 Sep 2003GrantedUS 6,616,639 B2
12 Apr 2019Term endedEstimated

Safety shield system for syringes

Life of this patent

Safety shield system for syringes

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims21

Description4,807 words

Drawings

Classification6 codes

Life of this patent

Description4,807 words