Contact trigger release needle guard
First Claim
1. A needle guard couplable to a ready-to-fill syringe, the ready-to-fill syringe including a body, a step down region at a distal end of the body, and a neck extending from the step down region, the needle guard comprisinga lock collar couplable to a neck of a ready-to-fill syringe, anda device shield biased to move relative to the lock collar from a first position in which a syringe sharp extends beyond the device shield to a second position in which the syringe sharp is covered by the device shield, the lock collar and device shield being configured to engage to prevent movement of the device shield relative to the lock collar and hold the device shield relative to the lock collar in the first position against the bias of a pre-loaded spring positioned between the lock collar and device shield and urging the device shield toward the second position, wherein the device shield is caused to disengage from the lock collar by the syringe as the device shield moves proximally enabling the device shield to move distally to the second position, wherein the device shield includes one or more retention arms to retain the device shield in the first position, wherein the one or more retention arms are radially deflectable by the syringe to disengage from the lock collar as the device shield moves proximally.
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Accused Products
Abstract
A needle guard device mountable to a pre-filled syringe in its ready-to-fill state. The device includes a lock collar and a device shield biased to move relative to the lock collar. The lock collar interfaces with the syringe neck to attach the device to the syringe. With the removal of a needle shield assembly comprising rigid and soft needle shields, the lock collar and device shield are free to move proximally along the syringe neck and interact with a syringe step down area to activate the device. As the device moves proximally, retention arms of the device shield interact with the syringe step down, causing the arms to deflect radially outwards to disengage from the lock collar triggering the device shield to move from a first position to a second position.
261 Citations
29 Claims
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1. A needle guard couplable to a ready-to-fill syringe, the ready-to-fill syringe including a body, a step down region at a distal end of the body, and a neck extending from the step down region, the needle guard comprising
a lock collar couplable to a neck of a ready-to-fill syringe, and a device shield biased to move relative to the lock collar from a first position in which a syringe sharp extends beyond the device shield to a second position in which the syringe sharp is covered by the device shield, the lock collar and device shield being configured to engage to prevent movement of the device shield relative to the lock collar and hold the device shield relative to the lock collar in the first position against the bias of a pre-loaded spring positioned between the lock collar and device shield and urging the device shield toward the second position, wherein the device shield is caused to disengage from the lock collar by the syringe as the device shield moves proximally enabling the device shield to move distally to the second position, wherein the device shield includes one or more retention arms to retain the device shield in the first position, wherein the one or more retention arms are radially deflectable by the syringe to disengage from the lock collar as the device shield moves proximally.
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8. A needle guard couplable to a ready-to-fill syringe, the ready-to-fill syringe including a body, a step down region at a distal end of the body, a neck extending from the step down region and a bulbus formed on the neck, the needle guard comprising
a lock collar couplable to a neck of a ready-to-fill syringe, wherein the lock collar includes retaining arms with pads at their ends that interface with the neck of the syringe and abut a bulbus on the neck to prevent distal movement of the lock collar relative to the neck beyond the bulbus, and a device shield biased to move relative to the lock collar from a first position in which a syringe sharp extends beyond the device shield to a second position in which the syringe sharp is covered by the device shield, the lock collar and device shield being configured to engage to prevent movement of the device shield relative to the lock collar and hold the device shield relative to the lock collar in the first position against the bias of a pre-loaded spring positioned between the lock collar and device shield and urging the device shield toward the second position, wherein the device shield is caused to disengage from the lock collar by the syringe as the device shield moves proximally enabling the device shield to move distally to the second position.
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15. A syringe assembly comprising
a syringe, a needle extending from a distal end of the syringe, and a needle guard coupled to the distal end of the syringe, the needle guard including a lock collar couplable to a neck of the syringe, and a device shield biased to move relative to the lock collar from a first position in which a syringe sharp extends beyond the device shield to a second position in which the syringe sharp is covered by the device shield, the lock collar and device shield being configured to engage to prevent movement of the device shield relative to the lock collar and hold the device shield relative to the lock collar in the first position against the bias of a pre-loaded spring positioned between the lock collar and device shield and urging the device shield toward the second position, wherein the device shield is caused to disengage from the lock collar by the syringe as the device shield moves proximally enabling the device shield to move distally to the second position, wherein the device shield includes one or more retention arms to retain the device shield in the first position, wherein the one or more retention arms are radially deflectable by the syringe to disengage from the lock collar as the device shield moves proximally.
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22. A syringe assembly comprising
a syringe, a needle extending from a distal end of the syringe, and a needle guard coupled to the distal end of the syringe, the needle guard including a lock collar couplable to a neck of the syringe, wherein the lock collar includes flexible arms with pads at their ends that interface with the neck of the syringe and abut a bulbus to prevent distal movement of the lock collar relative to the neck beyond the bulbus, and a device shield biased to move relative to the lock collar from a first position in which a syringe sharp extends beyond the device shield to a second position in which the syringe sharp is covered by the device shield, the lock collar and device shield being configured to engage and hold the device shield relative to the lock collar in the first position against the bias urging the device shield toward the second position, wherein the device shield is caused to disengage from the lock collar by the syringe as the device shield moves proximally enabling the device shield to move distally to the second position.
Specification