CA2546468A1 — A device for readying a needle free injector for delivery

USPTO Abstract

A dispensing device, such as a needle free injector, comprising a spring which provides an energy store, and a dispensing member movable to effect dispensing under the force of the spring, a latch having a first, safe position which disables triggering of the device, a second, ready to trigger position in which it restrains movement of the dispensing member but enables triggering, and a third, triggered position in which it permits such movement. A trigger is operable by the user for moving the latch from the second position to the third position. A safety mechanism, preferably in the form of an appropriately shaped slot in the dispensing member, is effective before triggering the device to prevent movement of the latch to the third position. An attachment is provided for moving the latch from the first, safe position to the second, ready to trigger position to enable triggering of the device. A cap is provided to maintain the sterility and stability of the contained medicament, and the device is configured such that it is impossible to place it in the ready to trigger state prior to removal of the cap.