Needle assembly for drug delivery devices
AssigneeSanofi-Aventis Deutschland GmbH
InventorsMichael Jugl, Axel Teucher
Life of this patent
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Abstract
The present invention relates to a needle assembly for a drug delivery device comprising of a cup-shaped receptacle having a bottom section supporting a needle element being adapted to penetrate a pierceable seal of a cartridge to be disposed in a cartridge holder of the drug delivery device, wherein the receptacle comprises fastening means for releasably fastening the needle assembly to the cartridge holder, and wherein the fastening means is convertible into a release configuration by way of an elastic deformation of the receptacle.
Claims13
1-12. (canceled)
A needle assembly for a drug delivery device comprising:
- a cup-shaped receptacle having a bottom section supporting a needle element being adapted to penetrate a pierceable seal of a cartridge to be disposed in a cartridge holder of the drug delivery device,
- wherein the receptacle comprises fastening means for releasably fastening the needle assembly to the cartridge holder,
- wherein the fastening means is convertible into a release configuration by way of an elastic deformation of the receptacle, and
- wherein the cup-shaped receptacle is initially oval in cross section and comprises a resiliently deformable side wall section,
- wherein the fastening means comprise at least two radially inwardly protruding latching elements arranged on opposite endpoints of an imaginary short axis of the oval receptacle.
A method of releasably fastening a needle assembly to a cartridge holder of a drug delivery device, wherein the needle assembly comprises a cup-shaped and elastically deformable receptacle of substantially oval cross section comprising a bottom section supporting a needle element, wherein fastening of the needle assembly to the cartridge holder comprises the steps of:
- inserting a distal support of the cartridge holder of substantially circular cross section into the cup-shaped receptacle by displacing the receptacle translationally relative to the cartridge holder in proximal direction until radially inwardly protruding latching elements of the needle assembly form a positive interlock with an annular rim disposed at the outer circumference of the distal support.
Dependencies are inferred from the claim text.