AUTOINJECTOR WITH EXTENDABLE NEEDLE PROTECTOR SHROUD
First Claim
1. A syringe comprising:
- a housing having a proximal end and a distal end, the housing having a reservoir disposed therein;
a plunger to be received by the reservoir, the plunger being moveable between a first plunger position and a second plunger position;
a plunger spring configured to urge the plunger toward the second plunger position when the plunger spring is deployed;
an actuator to deploy the plunger spring;
a needle proximate the distal end of the housing, the needle in fluid communication with the reservoir;
a shroud coupled with the housing, the shroud being moveable between a retracted position and an extended position, the shroud surrounding at least a portion of the needle when in the extended position;
a shroud spring biased to urge the shroud toward the extended position when the shroud spring is deployed; and
an interlocking assembly in communication with the shroud, the interlocking assembly having a first condition to maintain the shroud in the retracted position and a second condition to deploy the shroud spring and allow movement of the shroud toward the extended position.
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Accused Products
Abstract
The invention provides a syringe and a method for using the same. The syringe includes a housing having a reservoir disposed therein and a plunger to be received by the reservoir, the plunger being moveable between a first plunger position and a second plunger position. The syringe also includes a plunger spring to urge the plunger toward the second plunger position and an actuator to deploy the plunger spring. The syringe also includes a needle proximate the distal end of the housing displaceable from a first needle position to a second needle position, and a shroud coupled with the housing. The shroud is moveable between a retracted position and an extended position, the shroud surrounding at least a portion of the needle when in the extended position. The syringe also includes an interlocking assembly, a shroud spring, and a locking assembly configured to inhibit movement of the shroud.
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Citations
24 Claims
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1. A syringe comprising:
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a housing having a proximal end and a distal end, the housing having a reservoir disposed therein;
a plunger to be received by the reservoir, the plunger being moveable between a first plunger position and a second plunger position;
a plunger spring configured to urge the plunger toward the second plunger position when the plunger spring is deployed;
an actuator to deploy the plunger spring;
a needle proximate the distal end of the housing, the needle in fluid communication with the reservoir;
a shroud coupled with the housing, the shroud being moveable between a retracted position and an extended position, the shroud surrounding at least a portion of the needle when in the extended position;
a shroud spring biased to urge the shroud toward the extended position when the shroud spring is deployed; and
an interlocking assembly in communication with the shroud, the interlocking assembly having a first condition to maintain the shroud in the retracted position and a second condition to deploy the shroud spring and allow movement of the shroud toward the extended position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A syringe comprising:
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a housing having a proximal end and a distal end, the housing having a reservoir disposed therein;
a plunger to be received by the reservoir, the plunger being moveable between a first plunger position and a second plunger position;
at least one guide element to provide registration between the reservoir and the plunger;
a plunger spring configured to urge the plunger toward the second plunger position when the plunger spring is deployed;
an actuator to deploy the plunger spring;
a needle proximate the distal end of the housing, the needle in fluid communication with the reservoir;
a shroud coupled with the housing, the shroud being moveable between a retracted position and an extended position, the shroud surrounding at least a portion of the needle when in the extended position;
a shroud spring biased to urge the shroud toward the extended position when the shroud spring is deployed; and
an interlocking assembly in communication with the shroud, the interlocking assembly having a first condition to maintain the shroud in the retracted position and a second condition to deploy the shroud spring and allow movement of the shroud toward the extended position. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of delivering a beneficial agent to a patient, the method comprising the steps of:
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providing a syringe including a housing having a proximal end and a distal end, the housing having a reservoir disposed therein, a plunger to be received by the reservoir, the plunger being moveable between a first plunger position and a second plunger position, a plunger spring configured to urge the plunger toward the second plunger position when the plunger spring is deployed, an actuator to deploy the plunger spring, a needle proximate the distal end of the housing for delivering beneficial agent from the reservoir to a patient, a shroud coupled with the housing, the shroud being moveable between a retracted position and an extended position, the shroud surrounding at least a portion of the needle when in the extended position, a shroud spring biased to urge the shroud toward the extended position when the shroud spring is deployed, and an interlocking assembly in communication with the shroud, the interlocking assembly having a first condition to maintain the shroud in the retracted position and a second condition to deploy the shroud spring and allow movement of the shroud toward the extended position;
loading beneficial agent in the reservoir of the syringe;
positioning the syringe at an injection site of a patient;
moving the plunger toward the second plunger position to dispense the beneficial agent from the reservoir through the needle; and
switching the interlocking assembly to the second condition to deploy the shroud spring and allow movement of the shroud toward the extended position. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification