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 carried by said barrel adjacent the needle 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 needle end of the plunger and engageable with a mating connection engagement structure on the adapter, said structures being engageable to enable subsequent rotation of the adapter relative to the barrel in response to relative rotation of the plunger and barrel, after substantially full axial insertion of said plunger in said barrel engages the plunger and adapter one with the other, thus enabling the adapter and any attached needle to be removed from the end of the barrel and to be withdrawn into the interior of the barrel when the plunger is rotated in a given direction and the plunger is withdrawn from the needle end of the barrel,said plunger including a needle end portion and an opposite end portion, said opposite end portion including connection structure at its distal end sized and designed to cooperate with complementary connection structure included at the needle end of said barrel;
said plunger further including intermediate structure for detachably connecting said needle end and opposite end portions;
whereby said opposite end portion of the plunger can be detached, and connected to the needle end of the barrel when the plunger has been withdrawn from the needle end of the barrel whether or not a needle connected to said engagement mechanism extends from said barrel.
4 Assignments
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 needle stick 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.
141 Citations
51 Claims
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1. A syringe comprising:
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(a) a hollow, axially-elongated barrel; (b) an adapter carried by said barrel adjacent the needle 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 needle end of the plunger and engageable with a mating connection engagement structure on the adapter, said structures being engageable to enable subsequent rotation of the adapter relative to the barrel in response to relative rotation of the plunger and barrel, after substantially full axial insertion of said plunger in said barrel engages the plunger and adapter one with the other, thus enabling the adapter and any attached needle to be removed from the end of the barrel and to be withdrawn into the interior of the barrel when the plunger is rotated in a given direction and the plunger is withdrawn from the needle end of the barrel, said plunger including a needle end portion and an opposite end portion, said opposite end portion including connection structure at its distal end sized and designed to cooperate with complementary connection structure included at the needle end of said barrel; said plunger further including intermediate structure for detachably connecting said needle end and opposite end portions; whereby said opposite end portion of the plunger can be detached, and connected to the needle end of the barrel when the plunger has been withdrawn from the needle end of the barrel whether or not a needle connected to said engagement mechanism extends from said barrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 48)
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19. A syringe having an elongated plunger movable within a barrel toward and away from a needle end of the barrel and a multiple engagement mechanism disposed at said needle end for forming detachable connections with a needle, said barrel and said plunger, said plunger further comprising:
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a needle end portion and an opposite end portion, said opposite end portion including connection structure sized and designed to cooperate with complementary connection structure included at the needle end of said barrel; said plunger further including intermediate structure for detachably connecting said needle end and opposite end portions; whereby said opposite end portion of the plunger can be detached and connected to the needle end of the barrel when the plunger has been withdrawn from the needle end of the barrel whether or not a needle connected to said engagement mechanism extends from said barrel. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 49)
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35. A syringe comprising:
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a hollow, axially-elongated barrel having a needle end and an opposite end; an adapter removably mounted at the needle end of said barrel having a central fluid passage adapted for removable coupling to a hollow needle; an elongated plunger having a needle end portion and an opposite end portion and being axially movable in the hollow barrel; an adaptor engagement structure disposed at the needle 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 needle end of the barrel, said structures being cooperable, upon engagement, to cause relative rotation of the plunger and the adapter in response to such axial movement and to cause the adapter and any needle attached thereto to part from the end of the barrel in response to subsequent relative rotation of the plunger and the barrel and to be withdrawn into the interior of the barrel when the plunger is withdrawn from the distal end of the barrel; said opposite end portion of said plunger including connection structure sized and designed to cooperate with complementary connection structure included at the needle end of said barrel; and said plunger further including intermediate structure for detachably connecting said needle end and opposite end portions whereby said opposite end portion of the plunger when it is withdrawn from the needle end of the barrel can be detached and connected to the barrel needle end whether or not said adapter and attached needle have been withdrawn into the barrel interior. - View Dependent Claims (36, 37, 50)
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38. A syringe having a plunger movable within a barrel toward and away from a needle end of the barrel and a multiple engagement mechanism disposed at said needle end for forming detachable connections with a needle, said barrel and said plunger, said plunger further comprising:
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a needle end portion and an opposite end portion, said opposite end portion including connection structure sized and designed to cooperate with complementary connection structure included at the needle end of said barrel; said plunger further including intermediate structure for detachably connecting said needle end and opposite end portions; whereby said opposite end portion of the plunger is connectable to the barrel needle end both before and after the syringe is used and connectable to the plunger needle end portion during syringe use. - View Dependent Claims (39, 40, 41, 51)
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42. A syringe comprising:
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a hollow, axially-elongated barrel; an adapter removably mounted at the distal end of said barrel and having a central fluid passage; a ferrule carrying a hollow needle and adapted for removable connection with the adapter adjacent the barrel end, with the hollow needle in communication with the central fluid passage of the adapter; a plunger axially movable in the hollow barrel; 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 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 be withdrawn into the interior of the barrel when the plunger is withdrawn from the distal end of the barrel, leaving the distal end of the barrel open; and means cooperable with said distal end of said barrel for closing said open end thereof. - View Dependent Claims (43, 44)
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45. A syringe comprising:
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a hollow, axially-elongated barrel; 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; a plunger axially movable in the hollow barrel; 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 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, leaving said distal end of said barrel open; and means cooperable with said distal end of said barrel for closing said open end thereof. - View Dependent Claims (46, 47)
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Specification