Passive latch ring safety shield for injection devices
First Claim
1. A passive safety shield device comprising:
- an inner sheath having a proximal end and a distal end and defining a longitudinal channel which extends between the proximal and distal ends and is dimensioned to receive an injection device;
an outer sheath having a proximal end and a distal end and defining a longitudinal channel dimensioned to slidably receive the inner sheath;
a biasing member supported within the outer sheath, the biasing member being positioned to urge the outer sheath from a retracted position to an advanced position in relation to the inner sheath; and
a deformable ring positioned on the safety shield device, the deformable ring being deformable from an undeformed condition to a deformed condition in response to actuation of injection device, the deformable ring in its undeformed condition being configured to retain the outer sheath in the retracted position;
wherein in its deformed condition, the deformable ring is configured to allow movement of the outer sheath in relation to the inner sheath from the retracted position to the advanced position.
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Accused Products
Abstract
A passive latch ring safety shield for use with medical injection devices is disclosed. The safety shield includes an inner sheath defining a channel which is dimensioned to receive an injection device and an outer sheath defining a channel which is dimensioned to slidably receive the inner sheath. A biasing member is provided between the inner and outer sheaths to urge the outer sheath in relation to the inner sheath from a retracted position to an advanced position. A resilient latch ring is supported on the safety shield in a position to prevent movement of the outer sheath in relation to the inner sheath from a retracted to and advanced position. The latch ring is deformable in response to actuation of the injection device to disengage the outer sheath from the inner sheath and allow the biasing member to move the outer sheath from the retracted position to the advanced position in relation to the inner sheath.
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Citations
34 Claims
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1. A passive safety shield device comprising:
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an inner sheath having a proximal end and a distal end and defining a longitudinal channel which extends between the proximal and distal ends and is dimensioned to receive an injection device;
an outer sheath having a proximal end and a distal end and defining a longitudinal channel dimensioned to slidably receive the inner sheath;
a biasing member supported within the outer sheath, the biasing member being positioned to urge the outer sheath from a retracted position to an advanced position in relation to the inner sheath; and
a deformable ring positioned on the safety shield device, the deformable ring being deformable from an undeformed condition to a deformed condition in response to actuation of injection device, the deformable ring in its undeformed condition being configured to retain the outer sheath in the retracted position;
wherein in its deformed condition, the deformable ring is configured to allow movement of the outer sheath in relation to the inner sheath from the retracted position to the advanced position. - 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, 28, 29)
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30. An injection device and passive safety shield assembly comprising:
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an injection device including a barrel portion defining a fluid reservoir, a hub portion supporting a hollow needle, and a plunger assembly including a plunger head;
an inner sheath having a proximal end and a distal end and defining a longitudinal channel which extends between the proximal and distal ends and is dimensioned to receive the injection device;
an outer sheath having a proximal end and a distal end and defining a longitudinal channel dimensioned to slidably receive the inner sheath;
a biasing member supported within the outer sheath, the biasing member being positioned to urge the outer sheath from a retracted position to an advanced position in relation to the inner sheath; and
a deformable ring positioned on the safety shield device, the deformable ring being deformable from an undeformed condition to a deformed condition in response to actuation of the plunger assembly of the injection device, the deformable ring in its undeformed condition being configured to retain the outer sheath in relation to the inner sheath in the retracted position;
wherein in its deformed condition, the deformable ring is configured to allow movement of the outer sheath in relation to the inner sheath from the retracted position to the advanced position. - View Dependent Claims (31, 32, 33, 34)
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Specification