Re-useable auto-injector with filling means
First Claim
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1. An injection device having a first sub-assembly, the first sub-assembly comprising:
- a housing;
a chamber disposed within the housing and having proximal and distal ends, an inner surface and an exit aperture;
a stopper movably disposed within the chamber and having an outer surface substantially in contact with the inner surface about its perimeter; and
a port movable in relation to the housing and coupled to the chamber such that movement of the port causes a corresponding movement of the chamber and the exit aperture, relative to the housing, the port adapted to receive a container containing a fluid;
wherein when the port and the chamber are moved in relation to the housing, the stopper remains stationary with respect to the housing such that movement of the port causes movement of the exit aperture in relation to the stopper, wherein the port is configured to bring said container into fluid engagement with the exit aperture when the exit aperture is adjacent the stopper.
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Abstract
An injection device having a first sub-assembly comprises a housing and a chamber. The chamber is disposed within the housing and has proximal and distal ends, an inner surface and an exit aperture. The sub-assembly comprises a stopper movably disposed within the chamber. The stopper has an outer surface substantially in contact with the inner surface about its perimeter. The sub-assembly comprises a port adapted to receive a container containing a fluid. The stopper is fixed with respect to the housing and movement of the port causes movement of the exit aperture in relation to the stopper.
436 Citations
10 Claims
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1. An injection device having a first sub-assembly, the first sub-assembly comprising:
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a housing; a chamber disposed within the housing and having proximal and distal ends, an inner surface and an exit aperture; a stopper movably disposed within the chamber and having an outer surface substantially in contact with the inner surface about its perimeter; and a port movable in relation to the housing and coupled to the chamber such that movement of the port causes a corresponding movement of the chamber and the exit aperture, relative to the housing, the port adapted to receive a container containing a fluid; wherein when the port and the chamber are moved in relation to the housing, the stopper remains stationary with respect to the housing such that movement of the port causes movement of the exit aperture in relation to the stopper, wherein the port is configured to bring said container into fluid engagement with the exit aperture when the exit aperture is adjacent the stopper. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of priming an injection device having a first sub-assembly comprising a housing, the method comprising the steps of:
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inserting a container into a port on the injection device, the port being moveable with respect to the housing, the first sub-assembly comprising a chamber having an exit aperture and a stopper movably disposed within the chamber, the chamber being coupled to the port such that movement of the port causes a corresponding movement of the chamber and the exit aperture, relative to the housing, wherein when the port and the chamber are moved in relation to the housing, the stopper remains stationary with respect to the housing such that movement of the port causes movement of the exit aperture relative to the stopper; moving the port into the housing; and moving the port out of the housing such that fluid is drawn into the chamber from the container.
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Specification