Patent attributes
The invention refers to a shuttering mechanism for controlling translation of a longitudinally moveable component within a housing, the shuttering mechanism comprising at least one fixed shutter attached to or integrated with the housing and at least one moving shutter arm moveable between at least one locking position and at least one unlocking position, wherein at least one resilient arm is associated with the longitudinally moveable component, the resilient arm having a dog resiliently biased towards the fixed shutter, wherein the moving shutter arm is arranged alongside the fixed shutter, wherein at least one fixed protrusion is arranged on the fixed shutter at least one of them arranged for engaging the dog so as to prevent translation of the longitudinally moveable component in a proximal direction, wherein at least one moving protrusion is arranged on the moving shutter arm, at least one of them ramped in a manner to disengage the dog from the at least one of the fixed protrusions and/or to prevent engagement of the dog to the fixed protrusion when the moving shutter arm is in the unlocking position, wherein the moving shutter arm is arranged to allow engagement of the dog with the fixed protrusion in the locking position.
