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US 2026/0216441 A1Published application
Plunger rod, sub-assembly and medicament delivery device
AssigneeShl Medical AG
InventorsAmit Singh, Joakim Gunnar Lindholm
Life of this patent
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Abstract
The present disclosure provides a plunger rod for a medicament delivery device, the plunger rod including a first section configured as shock absorber and a second section along a longitudinal axis of the plunger rod. A stiffness of the second section exceeds a stiffness of the first section by a factor of at least five two.
Claims16
1-15. (canceled)
A plunger rod for a medicament delivery device, the plunger rod comprising:
- a first section configured as shock absorbing element and a second section,
- wherein each of the first section and the second section are positioned along a longitudinal axis of the plunger rod between a proximal end of the plunger rod and a distal end of the plunger rod, and
- wherein a stiffness of the second section exceeds a stiffness of the first section by a factor of at least two.
The plunger rod of claim 15,
- wherein perforations arranged in the shell at adjacent levels along the longitudinal axis are arranged circumferential offset,
- preferably wherein two diamond or elliptic shaped perforations are arranged per level along the circumference of the shell, wherein centres of the perforations of adjacent levels are circumferential offset by a quarter of the circumference of the shell, and wherein perforations in adjacent levels overlap.
Dependencies are inferred from the claim text.