Safety shield system for a 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;
for delivering the medicament to the patient when said forward tip pierces the patient; 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 through said needle cannula forward tip;
a hollow shield body disposed on said front portion of said syringe barrel and releasably secured thereto, said shield body being selectively movable from a first position wherein said needle cannula forward tip is exposed, to a second position wherein said needle cannula forward tip is contained within said hollow shield body;
an urging member positioned between said hollow shield body and said barrel for imparting an urging force to said shield body for urging said shield body to said second position; and
an actuator mounted to said syringe barrel, said actuator axially movable from an initial position on said syringe barrel to a retracted position away from said needle cannula forward tip in response to the commencement of an application of the medicament delivery force to said thumb pad for releasing said hollow shield body from said barrel to allow said hollow shield body to move, under the urgency of said urging member, to said second position upon removal of said needle cannula tip 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 syringe barrel, a needle cannula coupled to the syringe barrel, and a plunger having an end connected to a stopper for insertion into an end of the barrel. A shield system is provided for preventing inadvertent needle sticks after use of the syringe. The shield system includes an actuator mounted on the syringe barrel and movable from an initial position to a retracted position in response to the application of the medicament delivery force. A shield arranged on the front portion of the barrel is responsive to the position of the actuator to deploy the shield from a first position wherein the tip of the needle cannula is exposed, to a second position wherein the shield covers the needle cannula tip.
129 Citations
41 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;
for delivering the medicament to the patient when said forward tip pierces the patient; 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 through said needle cannula forward tip;
a hollow shield body disposed on said front portion of said syringe barrel and releasably secured thereto, said shield body being selectively movable from a first position wherein said needle cannula forward tip is exposed, to a second position wherein said needle cannula forward tip is contained within said hollow shield body;
an urging member positioned between said hollow shield body and said barrel for imparting an urging force to said shield body for urging said shield body to said second position; and
an actuator mounted to said syringe barrel, said actuator axially movable from an initial position on said syringe barrel to a retracted position away from said needle cannula forward tip in response to the commencement of an application of the medicament delivery force to said thumb pad for releasing said hollow shield body from said barrel to allow said hollow shield body to move, under the urgency of said urging member, to said second position upon removal of said needle cannula tip from the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A combination of a syringe assembly and a shield system;
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wherein said syringe assembly comprises 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;
for delivering the medicament to the patient when said forward tip pierces the patient, 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 through said needle cannula forward tip; and
wherein said shield system comprises a hollow shield body disposed on said front portion of said syringe barrel and releasably secured thereto, said shield body being selectively movable from a first position wherein said needle cannula forward tip is exposed, to a second position wherein said needle cannula forward tip is contained within said hollow shield body, an urging member positioned between said hollow shield body and said barrel for imparting an urging force to said shield body for urging said shield body to said second position, and an actuator mounted to said syringe barrel, said actuator axially movable from an initial position on said syringe barrel to a retracted position away from said needle cannula forward tip in response to the commencement of an application of the medicament delivery force to said thumb pad for releasing said hollow shield body from said barrel to allow said hollow shield body to move, under the urgency of said urging member, to said second position upon removal of said needle cannula tip from the patient. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. 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;
for delivering the medicament to the patient when said forward tip pierces the patient; 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 through said needle cannula forward tip;
a hollow shield body disposed on said front portion of said syringe barrel and releasably secured thereto, said shield body being selectively movable from a first position wherein said needle cannula forward tip is exposed, to a second position wherein said needle cannula forward tip is contained within said hollow shield body;
means for urging said shield body from said first position to said second position;
means for releasably retaining said hollow shield body to said syringe barrel; and
means for actuating said retaining means for causing said urging means to move said hollow shield body to said second position, said actuating means being actuated upon the commencement of an application of the medicament delivery force to said thumb pad.
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Specification