B D Medico

Sanofi-a Ventis Deutschland Gmbh

Ulf Polzin

Jochen Gabriel

The invention concerns a needle arrangement for an injection device (,). It has a hollow needle carrier (,) on which a hollow needle (,) is mounted and which is configured for mounting on the injection device (,). The arrangement has a cap (,) which is displaceable on the hollow needle carrier (,) approximately parallel to the longitudinal extension of the hollow needle (,), is equipped at its proximal end segment with a passthrough opening (,) for the hollow needle (,), and in its proximal end position substantially conceals the hollow needle (,). A compression spring (,) is arranged between the hollow needle carrier (,) and cap (,) in order to displace the cap (,) into its proximal end position. Also provided is a covering cap (,) which surrounds the displaceable cap (,), the hollow needle (,), and the hollow needle carrier (,), and is sealed on its open side by a sealing member (,) that is removable by the user. A needle arrangement of this kind can easily be replaced after an injection. It improves compliance because the patient does not at any time see the hollow needle (,). The compression spring can be configured as a plastic spring (,). It is preferably integral with the hollow needle carrier (,), which simplifies manufacture.

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Leinfelden, Germany

Ulf Polzin