Disposable Safety Syringe to Prevent Needlestick Injuries and Reuse
First Claim
1. A syringe comprising:
- a syringe barrel having proximal and distal ends;
a plunger in part disposed in said barrel and having a bung adjacent an end of the plunger within the barrel, said plunger being movable toward and away from the distal end of the barrel;
the distal end of the barrel terminating in an elongated end cannula having a central opening in communication with the interior of the barrel between the distal end of the barrel and plunger bung for receiving fluid into or expelling fluid from the barrel;
the barrel and cannula being molded from and formed of a single unitary plastic material.
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0 Petitions
Accused Products
Abstract
The syringe includes a cylindrical barrel, a plunger in part disposed within the barrel and an elongated end cannula extending from the distal end of the barrel and formed integrally with the barrel of a single unitary plastic material. The plunger includes a distal end portion within the barrel having surfaces cooperable with surfaces along the interior of the barrel and enabling separation of the plunger end from remaining portions of the plunger in response to relative rotation of the plunger and barrel. A collar may be disposed about the cannula to seal with the lip of a medication vial. A clip is engageable within the plunger and barrel to fix the axial location of the plunger relative to the barrel at selected locations therealong.
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Citations
22 Claims
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1. A syringe comprising:
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a syringe barrel having proximal and distal ends;
a plunger in part disposed in said barrel and having a bung adjacent an end of the plunger within the barrel, said plunger being movable toward and away from the distal end of the barrel;
the distal end of the barrel terminating in an elongated end cannula having a central opening in communication with the interior of the barrel between the distal end of the barrel and plunger bung for receiving fluid into or expelling fluid from the barrel;
the barrel and cannula being molded from and formed of a single unitary plastic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A syringe comprising:
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a syringe barrel having proximal and distal ends;
a plunger in part disposed in said barrel and having a bung adjacent an end of the plunger within the barrel, said plunger being movable toward and away from the distal end of the barrel;
the distal end of the barrel terminating in an elongated end cannula having a central opening in communication with the interior of the barrel between the distal end of the barrel and the plunger bung, for receiving fluid into or expelling fluid from the barrel;
the plunger having an end portion adjacent the bung and separable from remaining portions of the plunger, said plunger end portion and the barrel having cooperating surfaces enabling separation of the plunger end portion and the remaining portions of the plunger in response to relative rotation of the plunger and the barrel. - View Dependent Claims (16, 17)
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18. A syringe comprising:
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a syringe barrel having proximal and distal ends;
a plunger in part disposed in said barrel and having a bung adjacent an end of the plunger within the barrel, said plunger being movable toward and away from the distal end of the barrel;
the distal end of the barrel terminating in an elongated end cannula having a central opening in communication with the interior of the barrel between the distal end of the barrel and plunger bung for receiving fluid into or expelling fluid from the barrel; and
an annular collar about the cannula, said collar having an annular groove about an external surface thereof sized to receive the tip of a medication vial enabling the collar to seal between the cannula and the vial lip. - View Dependent Claims (19, 20)
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21. A syringe comprising:
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a syringe barrel having proximal and distal ends;
a plunger in part disposed in said barrel and having a bung adjacent an end of the plunger within the barrel, said plunger being movable toward and away from the distal end of the barrel;
the distal end of the barrel terminating in an elongated end cannula having a central opening in communication with the interior of the barrel between the distal end of the barrel and plunger bung for receiving fluid into or expelling fluid from the barrel; and
including a clip engageable with the plunger and the barrel at each of a plurality of selected axial locations of the plunger relative to the barrel thereby to fix the axial location of the plunger relative to the barrel at a selected location therealong. - View Dependent Claims (22)
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Specification