Medical syringe with safety shield system
First Claim
1. A medical device for delivering a medicament to a patient, comprising:
- a syringe assembly comprising;
a barrel having a forward end and a rear end and defining a reservoir within which the medicament may be contained;
a needle cannula having a forward tip and being coupled to said forward end of said barrel and in fluid communication with said reservoir; and
a plunger having a first end with a stopper positioned in said reservoir and a second end having a thumb pad for receiving medicament delivery pressure for causing said plunger to move within said reservoir to cause the medicament to be expelled from said reservoir;
a cap arranged on said needle cannula and slidable along said needle cannula from a first position in which said forward tip of said needle cannula is exposed, to a second position in which said forward tip of said needle cannula is covered by said cap; and
an actuation mechanism connected to said cap, said actuation mechanism having an urging member coupled to said barrel and said cap, and a trigger element releasably securing said urging member in a charged state and releasably securing said cap in said first position, said trigger element being actuatable to release said urging member and said cap by one of manual actuation or interaction with said thumb pad.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical device for delivering a medicament to a patient includes a syringe assembly having a barrel defining a reservoir containing the medicament, a needle cannula coupled to a forward end of the barrel, and a plunger having a stopper positioned in the barrel and movable into the barrel to cause the medicament to be expelled. The medical device also includes a cap arranged on, and slidable over, the needle cannula from a first position in which the forward tip of the needle cannula is exposed, to a second position in which the forward tip of the needle cannula is covered by the cap. An actuation mechanism connected to the cap includes an urging member coupled to the barrel and the cap for urging the cap toward the second position. A trigger element releasably secures the urging member in a charged state and releasably secures the cap in the first position. The trigger element is actuatable to release the cap by either manual actuation or by interaction with the thumb pad.
176 Citations
36 Claims
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1. A medical device for delivering a medicament to a patient, comprising:
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a syringe assembly comprising;
a barrel having a forward end and a rear end and defining a reservoir within which the medicament may be contained;
a needle cannula having a forward tip and being coupled to said forward end of said barrel and in fluid communication with said reservoir; and
a plunger having a first end with a stopper positioned in said reservoir and a second end having a thumb pad for receiving medicament delivery pressure for causing said plunger to move within said reservoir to cause the medicament to be expelled from said reservoir;
a cap arranged on said needle cannula and slidable along said needle cannula from a first position in which said forward tip of said needle cannula is exposed, to a second position in which said forward tip of said needle cannula is covered by said cap; and
an actuation mechanism connected to said cap, said actuation mechanism having an urging member coupled to said barrel and said cap, and a trigger element releasably securing said urging member in a charged state and releasably securing said cap in said first position, said trigger element being actuatable to release said urging member and said cap by one of manual actuation or interaction with said thumb pad. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A combination comprising a medical syringe with a safety shield, said medical syringe comprising a barrel having a forward end and a rear end and defining a reservoir within which the medicament may be contained, a needle cannula having a forward tip and being coupled to said forward end of said barrel and in fluid communication with said reservoir, and a plunger having a first end with a stopper positioned in said reservoir and a second end having a thumb pad for receiving medicament delivery pressure for causing said plunger to move within said reservoir to cause the medicament to be expelled from said reservoir;
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said safety shield comprising a cap arranged on said needle cannula and slidable along said needle cannula from a first position in which said forward tip of said needle cannula is exposed, to a second position in which said forward tip of said needle cannula is covered by said cap, and an actuation mechanism connected to said cap, said actuation mechanism having an urging member coupled to said barrel and said cap, and a trigger element releasably securing said urging member in a charged state and releasably securing said cap in said first position, said trigger element being actuatable to release said cap by one of manual actuation or interaction with said thumb pad. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A medical device for delivering a medicament to a patient, comprising:
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a syringe assembly comprising;
a barrel having a forward end and a rear end and defining a reservoir within which the medicament may be contained;
a needle cannula having a forward tip and being coupled to said forward end of said barrel and in fluid communication with said reservoir; and
a plunger having a first end with a stopper positioned in said reservoir and a second end having a thumb pad for receiving medicament delivery pressure for causing said plunger to move within said reservoir to cause the medicament to be expelled from said reservoir;
a cap arranged on said needle cannula and slidable along said needle cannula from a first position in which said forward tip of said needle cannula is exposed, to a second position in which said forward tip of said needle cannula is covered by said cap; and
an actuation mechanism connected to said cap, said actuation mechanism having means for urging said cap toward said second position, means for releasably securing said urging means in a charged state and means for releasably securing said cap in said first position, said means for releasably securing being actuatable to release said cap by one of manual actuation or interaction with said thumb pad.
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Specification