Patent ID: 8062255

Claim:
A device for delivering a dose of medicament, comprising: a generally elongated housing having a front end and a rear end, a container containing medicament to be injected through a needle, force means comprising a plunger rod and a compression spring arranged within the plunger rod, wherein the plunger rod is arranged to act on a stopper disposed in the container such that, upon activation of the force means, the container and the needle are moved for penetration and for subsequently expelling medicament through the needle, and activating means comprising a needle shield slidably arranged in relation to the housing, which upon movement releases the force means, wherein the elongated housing is elliptic in cross-section and has a short axis and a long axis, and the needle shield is arranged with slots in which fit a front end surface of the housing at the short axis, whereby the needle shield is locked from movement, wherein the activating means comprises stop ledges co-acting with ledges on the plunger rod to hold the plunger rod with the compression spring in a tensioned state, which stop ledges are arranged on a rotatable component and means arranged on the needle shield capable of rotating the rotatable component when the needle shield is moved a certain distance, rotating the stop ledges out of contact with the ledges on the plunger rod, releasing the plunger rod.