Safety syringe needle device with interchangeable and retractable needle platform
First Claim
Patent Images
1. For use with a syringe barrel having a female thread at a distal end thereof, a plunger at least partially within the barrel and adapter engagement structure on a distal end portion of the plunger, an adapter comprising:
- an adapter body having a male thread for releasable threaded engagement with the female thread at the distal end of the barrel to releasably secure the adapter and the barrel to one another and enable withdrawal of the adapter body into the barrel;
said adapter body having a central axial passageway for passing fluid between respective proximal and distal end portions thereof;
a plunger engagement structure on a proximal end portion of said adapter body for engagement with the adapter engagement structure on the distal end portion of the plunger, said plunger engagement structure including connective and drive surfaces, said connective surfaces including one of a generally radially extending rib or groove for engagement with a generally complementary-shaped groove or rib, respectively, of the adapter engagement structure of the plunger for withdrawing the adapter body into the barrel upon release thereof from the barrel;
said drive surfaces including a plurality of generally axially extending circumferentially spaced surfaces for engagement by generally complementary-shaped drive surfaces, respectively, of the adapter engagement structure of the plunger and rotating said adapter body relative to the barrel to unscrew the adapter body from the barrel in response to joint rotation of the plunger and adapter body relative to the barrel.
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Accused Products
Abstract
A syringe has a barrel, a plunger and an adapter for threaded engagement with the distal end of the barrel. The adapter has a central axial passageway for passing fluid between proximal and distal ends. The plunger and adapter have cooperating engagement structure including connective and drive surfaces for connecting the plunger to the adapter and unthreading the adapter from the barrel end for withdrawal of the adapter into the interior of the barrel.
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Citations
24 Claims
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1. For use with a syringe barrel having a female thread at a distal end thereof, a plunger at least partially within the barrel and adapter engagement structure on a distal end portion of the plunger, an adapter comprising:
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an adapter body having a male thread for releasable threaded engagement with the female thread at the distal end of the barrel to releasably secure the adapter and the barrel to one another and enable withdrawal of the adapter body into the barrel; said adapter body having a central axial passageway for passing fluid between respective proximal and distal end portions thereof; a plunger engagement structure on a proximal end portion of said adapter body for engagement with the adapter engagement structure on the distal end portion of the plunger, said plunger engagement structure including connective and drive surfaces, said connective surfaces including one of a generally radially extending rib or groove for engagement with a generally complementary-shaped groove or rib, respectively, of the adapter engagement structure of the plunger for withdrawing the adapter body into the barrel upon release thereof from the barrel; said drive surfaces including a plurality of generally axially extending circumferentially spaced surfaces for engagement by generally complementary-shaped drive surfaces, respectively, of the adapter engagement structure of the plunger and rotating said adapter body relative to the barrel to unscrew the adapter body from the barrel in response to joint rotation of the plunger and adapter body relative to the barrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A syringe comprising:
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(a) a hollow, axially elongated barrel having a hollow interior; (b) an adapter carried by said barrel adjacent a distal end thereof and removable therefrom in response to rotation relative to and about the axis of said barrel, the adapter having a passage for providing fluid communication with the interior of said hollow barrel; (c) a plunger axially movable in said barrel between positions axially spaced from said adapter and engaging said adapter, said plunger having first and second opposite ends; and (d) adapter engagement structure disposed at said first end of the plunger and engageable with a mating connection engagement structure on the adapter, said structures each having drive and connective engagement surfaces, said drive surfaces of said respective structures being engageable with one another when said plunger engages said adapter and jointly movable to enable rotation of the adapter relative to the barrel in response to relative rotation of the plunger and barrel to cause the adapter to part from the distal end of the barrel, said connective surfaces being engageable with one another to connect the plunger and adapter one with the other and enable said adapter, when parted from the end of the barrel in response to joint rotation of said adapter and said plunger relative to said barrel, to be withdrawn wholly into the interior of the barrel in response to joint axial movement of said plunger and said adapter in a direction away from the distal end of the barrel. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A syringe comprising:
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(a) a hollow, axially elongated barrel; (b) an adapter carried by said barrel adjacent a distal end thereof and removable therefrom in response to rotation relative to said barrel, the adapter having a central passage for providing fluid communication with the interior of said hollow barrel; (c) a plunger axially movable in said barrel between positions axially spaced from said adapter and engaging said adapter, said plunger having first and second opposite ends; and (d) adapter engagement structure disposed at said first end of the plunger and engageable with a mating connection engagement structure on the adapter, said structures each having drive and connective engagement surfaces, said drive surfaces being engageable with one another when said plunger lies in said adapter engaged position, said drive surfaces being jointly movable to enable rotation of the adapter relative to the barrel in response to relative rotation of the plunger and barrel to cause the adapter to part from the distal end of the barrel, said connective surfaces (i) lying in axial opposition to and engaged with one another when said drive surfaces are engaged with one another to connect the plunger and adapter one with the other and (ii) enabling said adapter, when parted from the end of the barrel in response to joint rotation of said adapter and said plunger relative to said barrel, to be withdrawn into the interior of the barrel in response to joint axial movement of said plunger and said adapter in a direction away from the distal end of the barrel. - View Dependent Claims (22, 23, 24)
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Specification