Reusable auto-injector

摘要

An injection device comprises a first sub-assembly comprising a chamber for holding a fluid and a transfer assembly moveably disposed within the chamber. The chamber comprises an exit aperture and an inner surface and the transfer assembly has an outer surface substantially in contact with the inner surface about its perimeter. The transfer assembly is adapted to transfer fluid into the chamber when the transfer assembly is moved within the chamber.

主权项

1. An injection device comprising:
a first sub-assembly comprising: a chamber for holding a fluid, said chamber comprising an exit aperture and an inner surface; and a transfer assembly movably disposed within the chamber and having an outer surface substantially in contact with the inner surface about its perimeter, said transfer assembly being adapted to transfer fluid into the chamber when the transfer assembly is moved within the chamber; wherein the transfer assembly is adapted to receive a fluid container and transfer fluid from the container into the chamber when the transfer assembly is moved with respect to the chamber; wherein the transfer assembly comprises a hollow fluid transfer needle adapted to engage the fluid container to form a fluid pathway from the container into the chamber through the hollow needle; wherein the transfer assembly further comprises a stopper for blocking fluid movement out of the transfer assembly; and wherein the fluid transfer needle is adapted to pierce the stopper to deliver fluid through the stopper into the chamber.