Safety shield system for a plastic syringe
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;
an outer shield having a forward end and a rear end movable on said barrel from a first position, in which said forward tip of said needle cannula extends past said forward end of said outer shield, and a second position in which said forward tip of said needle cannula is between said forward end and said rear end of said outer shield; and
an urging member connected to said outer shield, wherein said plunger interacts with said outer shield to charge said urging member with an urgency when said needle cannula is inserted into the patient and said plunger is moved into said barrel to expel medicament from said reservoir into the patient, said front end of said outer shield being movable by the urgency of said urging member toward said second position upon removal of said needle cannula from the patient.
1 Assignment
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Accused Products
Abstract
A medical device for delivering a medicament to a patient includes a syringe assembly having a barrel defining a reservoir for the medicament, a needle coupled to the forward end of the barrel, and a plunger having a stopper positioned in the reservoir. The plunger is movable within the reservoir to urge the medicament to be expelled from the reservoir. An outer shield having a forward end and a rear end is movable on the barrel from a first position to a second position in which the forward tip of the needle is positioned between the forward and rear ends of the outer shield. An urging member is connected to the outer shield. The plunger interacts with the outer shield to charge the urging member when the needle cannula is inserted into the patient for moving the front of the outer shield toward the second position when the needle is removed from the patient.
153 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;
an outer shield having a forward end and a rear end movable on said barrel from a first position, in which said forward tip of said needle cannula extends past said forward end of said outer shield, and a second position in which said forward tip of said needle cannula is between said forward end and said rear end of said outer shield; and
an urging member connected to said outer shield, wherein said plunger interacts with said outer shield to charge said urging member with an urgency when said needle cannula is inserted into the patient and said plunger is moved into said barrel to expel medicament from said reservoir into the patient, said front end of said outer shield being movable by the urgency of said urging member toward said second position upon removal of said needle cannula from the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A combination comprising a medical syringe with a shielding system, 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,
said shielding system comprising an outer shield having a forward end and a rear end movable on said barrel from a first position, in which said forward tip of said needle cannula extends past said forward end of said outer shield, and a second position in which said forward tip of said needle cannula is between said forward end and said rear end of said outer shield, and an urging member connected to said outer shield, wherein said plunger interacts with said outer shield to charge said urging member with an urgency when said needle cannula is inserted into the patient and said plunger is moved into said barrel to expel medicament from said reservoir into the patient, said front end of said outer shield being movable by the urgency of said urging member toward said second position upon removal of said needle cannula from the patient.
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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;
an outer shield having a forward end and a rear end movable on said barrel from a first position, in which said forward tip of said needle cannula extends past said forward end of said outer shield, and a second position in which said forward tip of said needle cannula is between said forward and rear ends of said outer shield;
an urging member connected to said outer shield; and
means for charging said urging member with an urgency when said needle cannula is inserted into the patient and said plunger is moved into said barrel to expel medicament from said reservoir into said patient, said front of said outer shield being movable by the urgency of said urging member toward said second position upon removal of said needle cannula from the patient.
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Specification