Injection device
First Claim
Patent Images
1. An injection device comprising:
- a housing adapted to receive a syringe having a reservoir portion and a discharge nozzle, so that the syringe is movable between a retracted position in which the discharge nozzle is contained within the housing and an extended position in which the discharge nozzle extends from the housing through an exit aperture;
a drive that acts upon the syringe to advance it from its refracted position to its extended position and discharge its contents through the discharge nozzle;
a removable cap adapted to be connected to the housing for closing the exit aperture; and
a syringe carrier for carrying the syringe as it is advanced, wherein the syringe carrier comprises a sheath for surrounding the reservoir portion of the syringe, wherein the sheath has a first internal diameter along its length, and an intermediate section with a second internal diameter which is smaller than the first internal diameter so that the first end of the sheath is adapted to support the syringe between the reservoir portion and the discharge nozzle;
wherein the removable cap is adapted to prevent movement of the syringe carrier in a direction towards the exit aperture when the removable cap is connected to the housing and the cap provides a first interface for preventing movement of the syringe carrier in a direction towards the exit aperture and the syringe carrier provides a second interface for directly contacting the first interface, wherein the first interface is located at an edge of a component within the cap, the component is adapted to extend into the exit aperture when connected to the housing and to grip a removable shield on the discharge nozzle of the syringe, and wherein the second interface is located on an annular protrusion at a first end of the syringe carrier which extends over the discharge nozzle.
2 Assignments
0 Petitions
Accused Products
Abstract
An injection device 110 is described having a housing 112 that receives a syringe 114 having a needle 118, wherein the syringe is supported in a syringe carrier 150. The injection device 110 has a removable cap 190. The syringe 114 and syringe carrier 150 are biased by a return spring 126 from an extended position in which the needle 118 extends from the housing 112 through an exit aperture 128 to a retracted position in which it does not. The syringe carrier 150 abuts a surface inside the removable cap 190 which prevents forward movement of the syringe carrier 150 when the cap is in place. The injection device is less prone to failure than prior art devices and is safer should failure occur.
454 Citations
8 Claims
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1. An injection device comprising:
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a housing adapted to receive a syringe having a reservoir portion and a discharge nozzle, so that the syringe is movable between a retracted position in which the discharge nozzle is contained within the housing and an extended position in which the discharge nozzle extends from the housing through an exit aperture; a drive that acts upon the syringe to advance it from its refracted position to its extended position and discharge its contents through the discharge nozzle; a removable cap adapted to be connected to the housing for closing the exit aperture; and a syringe carrier for carrying the syringe as it is advanced, wherein the syringe carrier comprises a sheath for surrounding the reservoir portion of the syringe, wherein the sheath has a first internal diameter along its length, and an intermediate section with a second internal diameter which is smaller than the first internal diameter so that the first end of the sheath is adapted to support the syringe between the reservoir portion and the discharge nozzle; wherein the removable cap is adapted to prevent movement of the syringe carrier in a direction towards the exit aperture when the removable cap is connected to the housing and the cap provides a first interface for preventing movement of the syringe carrier in a direction towards the exit aperture and the syringe carrier provides a second interface for directly contacting the first interface, wherein the first interface is located at an edge of a component within the cap, the component is adapted to extend into the exit aperture when connected to the housing and to grip a removable shield on the discharge nozzle of the syringe, and wherein the second interface is located on an annular protrusion at a first end of the syringe carrier which extends over the discharge nozzle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification