Norton Healthcare Limited

Matthew Alexander Morris

James Davies

Oliver Hart

Karl James Hewson

Matthew Keith Fordham

Joshua Arieh Shenker

George Bostock

George Robert Michael Savell

Xorge Castro Pelayo

Jeremy James Robert Kooyman

James Alexander Davies

An injection device comprising a housing () and a dose selector () to set a dose of medicament to be ejected from the injection device. A spring () coupled to the dose selector stores energy necessary for ejecting the dose from the injection device. A ratchet () arrangement is provided to rotationally couple a ratchet component and an internal surface of the housing in a coupled state and to allow relative rotation between the ratchet component and the internal surface of the housing in an uncoupled state. An over-torque feature () located between the dose selector and the spring is actuatable, when the rotation of the dose selector causes the charging force to exceed a defined limit, to reduce the charging force transferred from the dose selector to the spring. Both the ratchet component and the over-torque feature are provided on a single component ().

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

Matthew Alexander Morris