Sanofi-a Ventis Deutschland Gmbh

Sanofi

Simon Francis Brereton

Matthew Ekman

Thomas Mark Kemp

Rosie Burnell

Yannick Hourmand

Rosemary Louise Burnell

An auto-injector includes a housing, a sleeve, a plunger rod, and a drive spring. The sleeve is sized to receive at least a distal portion of a syringe. The syringe is substantially symmetric about at least two planes that are perpendicular to one another. The plunger rod has an axially-extending portion that is substantially symmetric about the at least two planes, and a flange. The auto-injector has (i) a first state in which at least two axially-extending resilient arms hold the plunger rod in a first position relative to the sleeve to prevent a medicament from being dispensed from the syringe and (ii) a second state in which the at least two axially-extending resilient arms are allowed to deflect radially inward to release the plunger rod from the sleeve to allow the medicament to be dispensed from the syringe.

Auto-injector

An auto-injector for administering a dose of a liquid medicament (M) is present having a tubular chassis telescopable in a tubular case, a carrier subassembly comprising a tubular carrier slidably arranged relative to the chassis inside the case, where the carrier is adapted to contain a syringe with a hollow injection needle. The injector also has a drive spring and a plunger for forwarding load of the drive spring to a stopper of the syringe, wherein the syringe is lockable for joint axial translation with the carrier. A control spring is arranged around the carrier for translating the carrier in a proximal direction (P) for insertion of the needle through the chassis into an injection site.

Plunger rod for an auto-injector

Auto-injector methods

Growing community of inventors

Cambridge, United Kingdom

Simon Francis Brereton