Injection device with internal dose indicator
AssigneeNovo Nordisk A/S
InventorChristian Peter Enggaard
Life of this patent
Estimating the term…
Abstract
The present invention relates to an injection device comprising a housing, a resilient member adapted to provide a force in the axial direction of the injection device for ejecting a dose from the injection device. The injection device further comprises a dose setting member operatively connected to a dose indicator barrel positioned within the housing, the dose setting member and the dose indicator barrel being movable relative to each other and cooperating to set the dose to be ejected from the injection device. The dose indicator barrel undergoes, during dose setting, a combined rotational and translational movement within the housing and relative to the housing.
Claims14
An injection device (1) comprising a housing (8),
- a piston rod that is separate element distinct from the housing and wherein the piston rod moves relative to the housing;
- a resilient member (7) adapted to provide a force in the axial direction of the injection device (1), the force being necessary for ejecting a dose from the injection device (1), and
- a dose setting member (2) operatively connected to a dose indicator barrel (4) positioned within the housing (8), the dose setting member (2) and the dose indicator barrel (4) being movable relative to each other and cooperating to set the dose to be ejected from the injection device (1), the
- dose indicator barrel (4) engaging a threaded portion of the housing (8), wherein the dose indicator barrel (4), both during dose setting and during injection, is adapted undergo a combined rotational and translational movement within the housing (8) and relative to the housing (8).
- a dose setting member (2) operatively connected to a dose indicator barrel (4) positioned within the housing (8), the dose setting member (2) and the dose indicator barrel (4) being movable relative to each other and cooperating to set the dose to be ejected from the injection device (1), the dose indicator barrel (4) engaging a threaded portion of the housing (8),
- wherein the dose indicator barrel (4), during dose setting, is adapted undergo a combined rotational and translational movement within the housing (8) and relative to the housing (8).
An injection device (1) comprising
- a housing (8),
- a piston rod for moving axial with respect to the housing, the piston rod being a separate element from the housing, the piston rod being adapted to act upon a cartridge and expel medication from the cartridge;
- a resilient member (7) adapted to provide a force in the axial direction of the injection device (1), the force being necessary for ejecting a dose from the injection device (1), and
- a dose setting member (2) operatively connected to a dose indicator barrel (4) positioned within the housing (8), the dose setting member (2) and the dose indicator barrel (4) being movable relative to each other and cooperating to set the dose to be ejected from the injection device (1), the dose indicator barrel (4) threadedly engaging a threaded portion of the housing (8), wherein the dose indicator barrel may be rotate with respect to the threaded portion of the housing and wherein threaded engagement between the threaded portion of the hosing and the dose indicator barrel causes the dose indicator barrel to translate with respect to the housing when it is rotated the rotation causes the dose indicator,
- wherein the dose indicator barrel (4), during dose setting, is adapted undergo a combined rotational and translational movement within the housing (8) and relative to the housing (8).
Dependencies are inferred from the claim text.