Norton Healthcare Limited

Xorge Castro Pelayo

Karl James Hewson

Jeremy James Robert Kooyman

James Davies

Oliver Hart

Matthew Keith Fordham

Joshua Arieh Shenker

Matthew Alexander Morris

An injection device comprises a housing having a longitudinal axis, an axially-depressible dose button (), a dose indicator (), a dose setting mechanism operatively coupled to said dose indicator and capable of setting a dose to be ejected from the injection device and spring capable of storing energy necessary for ejecting the dose from the injection device. The spring () is coupled to the dose setting mechanism such that a charging force can be transferred from the dose setting mechanism to the spring to increase the energy stored by the spring. The dose setting mechanism comprises an assembly of three components, including: &#x2022;a ratchet ring () rotationally and axially locked with respect to said housing, the ratchet ring including a ratchet component; &#x2022;a drive plate () including a first set of splines forming a ratchet arrangement with said ratchet component; and&#x2022;a dose selector () capable of being rotated about said longitudinal axis with respect to said housing to set the dose and including splines for disengaging said ratchet arrangement. The ratchet component is capable of interacting with both the splines on the dose selector and the splines on the drive plate.

Dose setting mechanism

An injection device comprising a housing having a longitudinal axis, a dose selector () capable of being rotated about said longitudinal axis with respect to said housing by a user to set a dose of medicament to be ejected from the injection device and a spring () capable of storing energy necessary for ejecting the dose of medicament from the injection device. The spring is coupled to the dose selector such that a charging force can be transferred from the dose selector to the spring to increase the energy stored by the spring. The injection device further comprises a ratchet arrangement () moveable between an engaged state in which the spring is limited from unwinding from a currently selected dose and a disengaged state in which the spring is able to unwind and a drive assembly including a plunger element () capable of providing an axial force for ejecting a dose of medicament from the injection device. The drive assembly further comprises a drive clutch () moveable from a disengaged state in which a force path from the spring to the plunger element is interrupted and an engaged state in which the drive assembly can provide the axial force for ejecting a dose of medicament from the injection device via said force path.

Dose delivery mechanism

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Cambridgeshire, United Kingdom

Xorge Castro Pelayo