Combined syringe and needle shield and method of manufacture
First Claim
1. A needle shielding device for use with a barrel, wherein a needle is attached to the forward end of the barrel, the improvement comprising:
- a separate shield retaining means mounted on said barrel and including at least one locking slot on its outer surface,an elongated needle shield having distal and proximal ends wherein said shield is movable over said barrel and retaining means between a retracted position in which the needle is exposed and an extended position in which said shield protects said needle, said shield including at least one elongated key on its interior surface, said key adapted to slide in a path outside said locking slot and being rotatable into said locking slot when said shield is in its extended position; and
an elongate needle protecting needle sheath having an open proximal end and a closed distal end wherein said need sheath is removably mounted on said distal end of said shield and said shield is movable between said retracted and extended positions with said needle sheath mounted thereon.
3 Assignments
0 Petitions
Accused Products
Abstract
A safety syringe of the type having a needle shield that is slidable between a needle exposing retracted position and a needle protecting extended position and wherein the needle shield is rotatable in the extended position to a locked and extended position. The safety syringe includes a collar mounted on the distal end of the syringe and a plurality of elongate keys on the interior surface of the needle shield. The keys are slidably received in various protrusions and slots on the collar to releasably retain the needle shield in the retracted and extended positions and to retain the needle shield in the locked and extended position. A needle sheath is also removably mounted on the distal end of the needle shield to cover the needle of the syringe when the needle shield is in the initial retracted position.
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Citations
25 Claims
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1. A needle shielding device for use with a barrel, wherein a needle is attached to the forward end of the barrel, the improvement comprising:
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a separate shield retaining means mounted on said barrel and including at least one locking slot on its outer surface, an elongated needle shield having distal and proximal ends wherein said shield is movable over said barrel and retaining means between a retracted position in which the needle is exposed and an extended position in which said shield protects said needle, said shield including at least one elongated key on its interior surface, said key adapted to slide in a path outside said locking slot and being rotatable into said locking slot when said shield is in its extended position; and an elongate needle protecting needle sheath having an open proximal end and a closed distal end wherein said need sheath is removably mounted on said distal end of said shield and said shield is movable between said retracted and extended positions with said needle sheath mounted thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A medical device comprising:
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a syringe including an elongate barrel having distal and proximal ends, a plunger slidable within said barrel, and a needle having a distal needle point thereon wherein said needle is attached to said distal end of said barrel, a collar operatively associated with said distal end of said barrel and including a plurality of locking slots on the outer surface of said collar, each of said locking slots being formed by a pair of opposed walls on said collar, an elongated needle shield movable over said barrel and said collar between a retracted position wherein said needle point is exposed and an extended position wherein said needle point is protected, said shield including a plurality of elongated keys on its interior surface, each of said keys being adapted to slide in a keyway displaced circumferentially from said locking slots on said collar and wherein at least one of said keys being rotatable into one of said locking slots when said shield is in its extended position, and a needle sheath having a closed distal end and an open proximal end wherein said open proximal end is mounted on said needle shield to protect said needle point when said shield is in the retracted position and wherein said shield and needle sheath are movable between said retracted and extended positions with said needle sheath protecting said needle when said shield is in said retracted position. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A medical device comprising:
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a syringe having distal and proximal ends and including a tubular barrel section, a plunger slidable within said barrel section, and a needle having a distal needle point thereon wherein said needle is attached to said distal end of said syringe, a collar having distal and proximal ends operatively associated with said distal end of said syringe, said distal end of said collar including a plurality of locking slots thereon and a plurality of protrusions along said collar wherein said protrusions are spaced apart on said collar to form a plurality of keyways therebetween, an elongated needle shield having distal and proximal ends movable over said barrel section and said collar between a retracted position in which said needle point is exposed and an extended position wherein said needle point is protected, said shield including a plurality of elongated keys on its interior surface, said keys being adapted to slide in said keyways formed between said protrusions on said collar wherein each of said keys are rotatable into one of said locking slots when said shield is in said extended position, and a needle sheath having an open proximal end and a closed distal end wherein said open proximal end is removably mounted to said distal end of said shield and said shield is movable between said retracted and extended positions with said needle sheath mounted thereon. - View Dependent Claims (20)
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21. In combination,
a syringe having distal and proximal ends including a barrel section therebetween, and a needle having a distal needle point wherein said needle is attached to the distal end of said syringe, collar means operatively associated with said syringe, an elongated needle shield having distal and proximal ends movable over said barrel section and said collar between a retracted position wherein said needle point is exposed and an extended position wherein said needle point is protected, means for orienting said shield in slidable alignment along said collar means wherein rotation of said shield about said barrel section is prevented as said shield is moved between said retracted and extended positions, locking means on one of said collar means or said shield to lock said shield in said extended position when said shield is in said extended position and rotated about said barrel section, and a needle sheath having an open proximal end and a closed distal end wherein said open proximal end is mountable on said distal end of said shield and said shield is movable between said retracted and extended positions with said sheath mounted thereon.
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22. A method of using a safety syringe including an elongate barrel having distal and proximal ends with a needle mounted on the distal end thereof and an elongate and tubular needle shield having distal and proximal ends slidably mounted about said barrel and including a needle sheath mounted on the distal end of the needle shield, the method including the steps of:
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sliding the needle shield and needle sheath from a retracted position wherein the needle extends distally beyond the needle shield and the needle sheath protects the needle to an extended position wherein the needle shield protects the needle, removing a needle sheath from the distal end of the needle shield, filling the syringe with a desired medication, and moving the needle shield proximally along the barrel to an extended position wherein the needle shield protects the needle of the syringe. - View Dependent Claims (23, 24)
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25. A method of using a safety syringe having an elongate barrel member including distal and proximal ends with a needle mounted on the distal end thereof and an elongate needle shield having distal and proximal ends slidably mounted about said barrel member and including a needle sheath mounted thereon, the method including the steps of:
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sliding the needle shield and needle sheath from an initial retracted position wherein the needle extends distally beyond the distal end of the needle shield and is protected by the needle sheath to an extended position wherein the needle is protected by the needle shield, removing a needle protecting needle sheath from the distal end of the needle shield, filling the safety syringe with a desired medication, injecting the patient with the desired medication, sliding the needle shield along the barrel to an extended position wherein the needle is protected by the needle shield, and rotating the needle shield about the barrel to place the needle shield in a locked and extended position.
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Specification