Norton Healthcare Limited

Dale Marc Comley

Christopher James Smith

An assembly () for a medication delivery device () has a body (), a dose setting part () configured to be operated by a user for selecting a size of a dose, a piston rod () configured to be moved axially without rotating for dispensing a medication, and a drive member () being directly coupled to the piston rod () for driving the piston rod () in a dose dispensing operation, wherein the drive member () moves in a proximal direction in a dose setting operation. The medication delivery device () into which the assembly is incorporated may be a single-shot, variable-dose injection device, e.g., a syringe.

Assembly for a medication delivery device and medication delivery device

An assembly for a medication delivery device having a body, a piston rod and a setting nut. The piston rod is rotatable relative to the body in a dose setting state and is axially movable in a distal direction with respect to the body in a dose delivering state. The setting nut is secured against rotational movement with respect to the body, but is axially movable relative to the body, being helically coupled with the piston rod to axially travel in the proximal direction for setting a dose of a medication due to a helical movement of the setting nut with respect to the piston rod when the piston rod is rotated in the dose setting state, and is able to axially travel in the distal direction for delivering the set dose of the medication when the piston rod is axially moved in the dose delivering state of the assembly.

Assembly for a medication delivery device and medication delivery device comprising such an assembly

An assembly for a medication delivery device includes a body, a piston rod, rotatable with respect to the body, for setting a dose of a medication, and axially movable in a distal direction for delivering the set dose, wherein, in cross-section, the piston rod includes a plurality of ratchet teeth to enable rotation of the piston rod during setting of a dose, and a stop member secured against axial and rotational movement, wherein the stop member mechanically cooperates with the piston rod, wherein, when setting the dose, the piston rod becomes aligned with the stop member, and wherein, when delivering the set dose, the piston rod is moved in the distal direction towards the stop member such that the piston rod and the stop member abut at the end of the dose delivery operation and further distal movement of the piston rod is prevented after dose delivery.

An assembly for a medication delivery device, wherein the assembly is configured to perform a dose setting operation, the assembly having a dose setting sleeve and a drive sleeve, wherein the dose setting sleeve has a first dosing track having a first length and defining a first size of a dose and a second dosing track having a second length and defining a second size of a dose, wherein the first length is different from the second length and the first size is different from the second size. The drive sleeve has an engagement feature configured to engage with one of the dosing tracks. The assembly is configured such the dose setting operation has a first step wherein the engagement feature is aligned with one of the dosing tracks and a second step wherein the engagement feature is moved along the dosing track.

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Parchwich, United Kingdom

Dale Marc Comley