Patent ID: 6899699

Claim:
A dose setting device for use in combination with a fluid-filled reservoir, the dose setting device for repetitive injection of individual set doses of fluid from the reservoir, the dose setting device comprising: a housing; a drive member to expel a dose of fluid from the reservoir; a spring for driving the drive member to expel the dose; a dose setting assembly mounted in the housing and connected to the spring, the dose setting assembly comprising a first portion being moveable by a user in a first direction to set a selected dose against the bias of the spring and a remaining portion, wherein movement of the first portion is accompanied by a straining of the spring, and wherein the first portion is moveable in an opposite direction to selectively adjust the set dose without moving the drive member and wherein the first portion is in continuous engagement with the remaining portion of the dose setting assembly; a latch means associated with the housing to retain the apparatus in the set position against the bias of the spring; and wherein the latch means is releasable to cause the drive member to expel the set dose from the fluid-filled reservoir when the dose-setting device is used in combination therewith, the force for expelling the set dose being provided by the spring.