Syringe safety sleeve and adaptor

Details Syringe safety sleeve and adaptor Syringe safety sleeve and adaptor

1999-11-16

2001-09-11

Kennedy, Sharon (Department: 3763)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

C128S919000

Reexamination Certificate

active

06287282

ABSTRACT:

BACKGROUND OF THE INVENTION AND PRIOR ART
The present invention relates to medical syringes for safely drawing blood or other fluid from a patient or for injecting a patient with medication of the type in which a protective sleeve is provided into which a hypodermic needle can be withdrawn and contained after use for safe disposal.
It is well known that protection of medical personnel from contaminated blood or other bodily fluids with which the medical personnel may come into contact during use of medical syringes is highly desirable if not essential in keeping with current medical safety standards.
OBJECTS OF THE INVENTION
It is therefore the primary object of the invention to provide an adaptor and protective sleeve combination for hypodermic syringes in which the adaptor may be easily and permanently affixed to the syringe without special tools by medical personnel or others and wherein the adaptor cooperates with the protective sleeve into which the syringe needle may be withdrawn after use.
It is a further object of the invention to provide a reliable syringe adaptor and protective sleeve combination for converting a conventional non-safety syringe to a safety syringe in which the adaptor and protective sleeve do not contact the syringe flow path and therefore need not be sterile and which is comprised of a small number of parts, each of which are easily formed in mass production.
It is a further object to provide a syringe and protective sleeve combination which meets the foregoing objectives.
SUMMARY OF THE INVENTION
The present invention accordingly provides a protective sleeve and adaptor hub combination for affixation to a medical syringe to enclose a needle affixed to the syringe following use thereof, said combination comprising:
a) an elongate generally cylindrical protective sleeve for telescopically enclosing a syringe, said sleeve having a track on an interior surface for receiving an external follower projection on an adaptor hub as said sleeve is affixed to said adaptor hub; and
b) a generally cylindrical adaptor hub sized to internally receive a needle support hub of a medical syringe axially in said adaptor hub, said adaptor hub having at least one internal male screw thread having a sharp leading end for penetrating relatively soft material of a syringe needle support hub during rotation of said adaptor hub relative to said needle support hub as said adaptor is screwed onto a support hub, said adaptor hub further having at least one external follower projection on an exterior surface for engagement with said track in said sleeve for guiding said hub in said sleeve for movement longitudinally of said sleeve; and
c) said sleeve and said hub having an engageable mating annular rib and recess for restraining axial movement of said hub and an attached syringe in said sleeve.
The present invention further provides a medical syringe including a housing having a needle support hub, a plunger in said housing and a needle affixed to said needle support hub, a protective outer sleeve for enclosing said needle following use thereof, said protective sleeve telescopically enclosing said syringe housing, and an adaptor hub affixed to said needle support hub and said outer sleeve, said adaptor hub internally receiving said needle support hub axially in said adaptor hub, said adaptor hub having at least one internal male screw thread having a hard sharp leading end penetrating relatively soft material of said needle support hub during rotation of said adaptor hub relative to said needle support hub as said adaptor hub is screwed onto said support hub, said sleeve having a track on an interior surface and said adaptor hub having at least one follower projection on an exterior surface engaged with said track in said sleeve for guiding said hub in said sleeve for movement longitudinally of said sleeve, and said sleeve and said hub having an engageable mating rib and recess for restraining axial movement of said hub and attached syringe in said sleeve.


REFERENCES:
patent: 5217437 (1993-06-01), Talonn et al.
patent: 5415645 (1995-05-01), Friend et al.
patent: 5817064 (1998-10-01), DeMarco et al.
patent: 5984899 (1999-11-01), D'Alessio et al.
patent: 6017329 (2000-01-01), Hake

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