Patent ID: 9579460
Date: 2017-02-28
CPC Classifications: A61M

Claim:
1. An injection device operable to deliver a dose of medicament from a syringe having a barrel, a piston, and a needle, the injection device comprising: a housing comprising a forward part ( a drive mechanism located in the rearward part of the housing and including a drive spring ( a firing element ( a temperature-sensitive arrangement that includes a thermally responsive element, the thermally responsive element having i) a first blocking position that blocks movement of the firing element from the initial position and prevents firing of the injection device, to ii) and a second non-blocking position that does not block movement of the firing element from the initial position and allows firing of the injection device, wherein the thermally responsive element remains in the first blocking position under a predetermined temperature condition, wherein, the thermally responsive element includes a pair of diametrically opposed bi-metallic strips anchored to the inner wall of the housing and cantilevered from the inner wall of the housing, in the first blocking position, the bi-metallic strips are flexed outwardly adjacent the inner wall of the housing with a distal end of each of the bi-metallic strips being in the first blocking position that blocks the movement of the firing element from the initial position, and in the second non-blocking position, the bi-metallic strips are flexed inwardly away from the inner wall of the housing with the distal end of each of the bi-metallic strips being in the second non-blocking position that does not block movement of the firing element from the initial position.