Safety syringe needle device with interchangeable and retractable needle platform
First Claim
1. A syringe comprising:
- (a) a hollow axially elongated barrel;
(b) an adapter removably mounted at the distal end of said barrel and having a central fluid passage;
(c) a ferrule carrying a hollow needle and adapted for removable connection with one of the barrel end and the adapter adjacent the barrel end, with the hollow needle in communication with the central fluid passage of the adapter;
(d) a plunger axially movable in the hollow barrel; and
an adapter engagement structure disposed at the distal end of the plunger and engageable with a mating connection engagement structure on the adapter in response to axial movement of the plunger toward the distal end of the barrel, said structures being cooperable to cause (1) relative rotation of the plunger end and the adapter in response to such axial movement, and (2) the adapter and needle ferrule with the needle attached thereto to part from the end of the barrel in response to subsequent relative rotation of the plunger and the barrel, thereby enabling the adapter and the needle ferrule with the needle attached thereto to be withdrawn into the interior of the barrel when the plunger is withdrawn from the distal end of the barrel.
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0 Petitions
Accused Products
Abstract
This invention relates to a safety syringe needle device which has medical and industrial application. More particularly, this invention pertains to a syringe which, after being used by a person to inject medication or fluid into a patient, or in sampling or exposure to toxic materials, or the like, can be transformed by the person to withdraw the needle into the barrel of the syringe for disposal purposes, thereby eliminating needlestick injuries among such persons. A syringe comprising (a) a hollow elongated barrel means; (b) penetration means which is adapted to removably engage with an end of the barrel means; (c) plunger means adapted to fit within and move axially in the hollow barrel means; the plunger means causing a pumping action within the interior of the barrel means between the plunger means and the end of the barrel means when the plunger means is pushed into the interior of the barrel means in the direction of the end of the barrel means; and (d) engaging means at the end of the plunger means proximate to the penetration means, the engaging means being adapted to engage the end of the penetration means when the plunger means is fully inserted into the interior of the barrel means in the direction of the end of the barrel means and cause the penetrating means to part from the end of the barrel means and to be withdrawn into the interior of the barrel when the plunger means is withdrawn away from the end of the barrel means. An adapter for a syringe having a piston and a needle base fitting in the end of the syringe comprising: (a) a protrusion formed at one end of the adapter for fitting inside the hollow of a base affixed to a syringe needle; (b) releasable engagement means formed in the exterior of the adapter and being adapted to releasably engage with the interior of the needle receiving end of a syringe barrel; and an engagement means formed in the end of the adapter opposite the protrusion, said engagement means being adapted to engage with the piston end of a syringe plunger.
98 Citations
36 Claims
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1. A syringe comprising:
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(a) a hollow axially elongated barrel; (b) an adapter removably mounted at the distal end of said barrel and having a central fluid passage; (c) a ferrule carrying a hollow needle and adapted for removable connection with one of the barrel end and the adapter adjacent the barrel end, with the hollow needle in communication with the central fluid passage of the adapter; (d) a plunger axially movable in the hollow barrel; and an adapter engagement structure disposed at the distal end of the plunger and engageable with a mating connection engagement structure on the adapter in response to axial movement of the plunger toward the distal end of the barrel, said structures being cooperable to cause (1) relative rotation of the plunger end and the adapter in response to such axial movement, and (2) the adapter and needle ferrule with the needle attached thereto to part from the end of the barrel in response to subsequent relative rotation of the plunger and the barrel, thereby enabling the adapter and the needle ferrule with the needle attached thereto to be withdrawn into the interior of the barrel when the plunger is withdrawn from the distal end of the barrel. - View Dependent Claims (2, 3, 4, 7, 8, 10, 11, 12)
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5. A hollow adapter for the interior of a syringe having a barrel, and a piston axially movable within the barrel, said adapter releasably attaching a hollow needle base to the distal end of the syringe and comprising:
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(a) a fitting formed at the distal end of the adapter for releasably coupling to the base of the syringe needle; (b) a releasable engagement means formed on the exterior of the adapter for releasable engagement with the interior of the distal end of the syringe barrel; and (c) an engagement means formed in the proximal end of the adapter for engagement with the distal end of the plunger including a non-jamming spiral thread one revolution or less about an axis coincident with the barrel axis and a groove formed about the adapter at an axial location generally corresponding to the base of the thread. - View Dependent Claims (6, 9)
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13. A syring having a plunger axially movable within a barrel toward and away from a distal end of the barrel and a multiple engagement mechanism disposed at said distal end, said mechanism including first, second and third separate attachment areas for effecting selective individually controllable attachment respectively;
- (a) to said distal end of the barrel, (b) to the distal end of said plunger and (c) to a removable hollow needle base, wherein said second attachment area includes a hollow central protrusion having at least one helical track around an outer surface of the protrusion.
- View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A device for use with a syringe barrel and piston and a removable hollow syringe needle having a standard connection, said device comprising:
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a central body having a central bore therethrough, a distal portion tapered to mate inside a standard hollow needle base and a proximal portion with engagement surfaces for receiving the distal end of a syringe piston latch; a radially projecting portion extending circumferentially and radially outwardly from said central body and disposed between said distal and proximal portions, said radially projecting portion being sized to fit within the distal end of a syringe barrel, said engagement surfaces of the central body including a pair of helical tracks disposed along the outside of said central body and terminating in linear axially and radially extending surfaces for engaging corresponding surfaces on the distal end of a syringe; and an externally threaded section on said adapter sized to removably mate within an internally threaded portion of he distal end of a syringe barrel. - View Dependent Claims (21, 22, 23)
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24. A syringe comprising:
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(a) a hollow, axially-elongated barrel; (b) an adapter carried by said barrel adjacent the distal end thereof and removable therefrom in response to rotation relative to the barrel, the adapter having a central fluid passage and adapted for removable coupling to a hollow needle; (c) a plunger axially movable in the hollow barrel; and (d) adapter engagement structure disposed at the distal end of the plunger and engageable with a mating connection engagement structure on the adapter, said structures having alignment, drive and connective pairs of respective engagement surfaces, said alignment pair of surfaces being engageable and relatively movable to align and engage said drive surfaces one with the other thereby to enable subsequent rotation of the adapter relative to the barrel in response to relative rotation of the plunger and barrel, said connective surfaces being engageable in response to substantially full axial insertion of said plunger in said barrel to connect the plunger and adapter one with the other, enabling the adapter and any attached needle to part from the end of the barrel and to be withdrawn into the interior of the barrel when the plunger is withdrawn from the distal end of the barrel. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A syringe comprising:
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(a) a hollow, axially-elongated barrel; (b) an adapter carried by said barrel adjacent the distal end thereof and removable therefrom in response to rotation relative to the barrel, the adapter having a central fluid passage and adapted for removable coupling to a hollow needle; (c) a plunger axially movable in the hollow barrel; (d) cooperable rotary drive and driven surfaces on said plunger and said adapter, respectively; (e) connective surfaces on said plunger and adapter, respectively; and (f) means cooperable between the distal end of the plunger and the adapter to enable initial relative rotation therebetween in response to axial movement of the plunger in the barrel toward full insertion to (a) align the cooperable rotary drive and driven surfaces, respectively, one with the other end (b) engage the connective surfaces thereof enabling joint axial movement of the adapter and plunger and, (c) upon subsequent relative rotational movement of said plunger and barrel, enable said adapter to part from the end of the barrel and to be withdrawn into the interior of the barrel when the plunger is withdrawn from the distal end of the barrel.
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Specification