Dose delivery device with modified decoupling clutch

Rotatable dose selector clutch for a dose delivery device, the dose delivery device having a dosage scale drum with interior dosage scale coupling teeth and a thrust bearing with exterior thrust bearing coupling teeth, the thrust bearing is configured to be threaded coupled to a piston rod,

• wherein the dose selector clutch is configured to be arranged in:
• a coupled position, wherein the dose selector clutch couples to the dosage scale drum and the thrust bearing, such that the dosage scale drum and the thrust bearing rotates when the dose selector clutch is rotated, and
• a decoupled position, wherein the dose selector clutch decouples from the dosage scale drum and the thrust bearing, such that the dosage scale drum and the thrust bearing are free to rotate independently of the dose selector clutch,
• wherein the dose selector clutch comprises inner coupling teeth and outer coupling teeth arranged along an annular circumference, the annular circumference extending in a rotational plane perpendicular to a centre axis extending in an axial direction, wherein the inner and outer coupling teeth protrude from the annular circumference with the inner coupling teeth protruding towards the centre axis and the outer coupling teeth protruding away from the centre axis.

Rotatable dose selector for a dose delivery device, the dose delivery device having a dosage scale drum with interior dosage scale coupling means and a thrust bearing with exterior thrust bearing coupling means, the thrust bearing is configured to be threaded coupled to a piston rod,

• wherein the dose selector is configured to be arranged in:
• a coupled position, wherein the dose selector couples to the dosage scale drum and the thrust bearing when the dose selector is rotated, such that the dosage scale drum and the thrust bearing rotates when the dose selector is rotated,
• a decoupled position, wherein the dose selector decouples from the dosage scale drum and the thrust bearing, such that the dosage scale drum and the thrust bearing are free to rotate independently of the dose selector,
• wherein the dose selector comprises a clutch comprising inner coupling means and outer coupling means arranged along an annular circumference, the annular circumference extending in a rotational plane perpendicular to a centre axis extending in an axial direction, the inner and outer coupling means protrude from the annular circumference with the inner coupling means protruding towards the centre axis and the outer coupling means protruding away from the centre axis,
• wherein in the coupled position, the outer coupling means are configured to interact with the dosage dial coupling means, and the inner coupling means are configured to interact with the thrust bearing coupling means, when the dose selector is rotated.

Rotatable dose selector for a dose delivery device, the dose delivery device having a dosage scale drum with interior dosage scale coupling teeth and a thrust bearing with exterior thrust bearing coupling teeth, the thrust bearing is configured to be threaded coupled to a piston rod,

• wherein the dose selector is configured to be arranged in:
• a coupled position, wherein the dose selector couples to the dosage scale drum and the thrust bearing when the dose selector is rotated, such that the dosage scale drum and the thrust bearing rotates when the dose selector is rotated,
• a decoupled position, wherein the dose selector decouples from the dosage scale drum and the thrust bearing, such that the dosage scale drum and the thrust bearing are free to rotate independently of the dose selector,
• wherein the dose selector comprises a clutch comprising inner coupling teeth and outer coupling teeth, arranged along an annular circumference, the annular circumference extending in a rotational plane perpendicular to a centre axis extending in an axial direction, wherein the inner and outer coupling teeth protrude from the annular circumference with the inner coupling teeth protruding towards the centre axis and the outer coupling teeth protruding away from the centre axis,
• wherein in the coupled position, the outer coupling teeth are configured to interact with the dosage dial coupling teeth, and the inner coupling teeth are configured to interact with the thrust bearing coupling teeth, when the dose selector is rotated.

Push button for a dose delivery device, the dose delivery device having a dosage scale drum with interior dosage scale coupling means and a thrust bearing with exterior thrust bearing coupling means, the thrust bearing is configured to be threaded coupled to a piston rod,

• wherein the push button is configured to be arranged in:
• a coupled position, wherein the push button couples to the dosage scale drum and the thrust bearing when the push button is rotated, such that the dosage scale drum and the thrust bearing rotates when the push button rotates,
• a decoupled position, wherein the push button decouples from the dosage scale drum and the thrust bearing, such that the dosage scale drum and the thrust bearing are free to rotate independently of the push button,
• wherein the push button comprises a clutch comprising inner coupling means and outer coupling means arranged along an annular circumference, the annular circumference extending in a rotational plane perpendicular to a centre axis extending in an axial direction, the inner and outer coupling means protrude from the annular circumference with the inner coupling means protruding towards the centre axis and the outer coupling means protruding away from the centre axis,
• wherein in the coupled position, the outer coupling means are configured to interact with the dosage scale coupling means, and the inner coupling means are configured to interact with the thrust bearing coupling means, when the push button rotates.

Push button for a dose delivery device, the dose delivery device having a dosage scale drum with interior dosage scale coupling teeth and a thrust bearing with exterior thrust bearing coupling teeth, the thrust bearing is configured to be threaded coupled to a piston rod,

• wherein the push button is configured to be arranged in:
• a coupled position, wherein the push button couples to the dosage scale drum and the thrust bearing when the push button is rotated, such that the dosage scale drum and the thrust bearing rotates when the push button rotates,
• a decoupled position, wherein the push button decouples from the dosage scale drum and the thrust bearing, such that the dosage scale drum and the thrust bearing are free to rotate independently of the push button,
• wherein the push button comprises a clutch comprising inner coupling teeth and outer coupling teeth arranged along an annular circumference, the annular circumference extending in a rotational plane perpendicular to a centre axis extending in an axial direction, wherein the inner and outer coupling teeth protrude from the annular circumference with the inner coupling teeth protruding towards the centre axis and the outer coupling teeth protruding away from the centre axis,
• wherein in the coupled position, the outer coupling teeth are configured to interact with the dosage scale coupling teeth, and the inner coupling teeth are configured to interact with the thrust bearing coupling teeth, when the push button rotates.