AUTO-INJECTOR
1 Assignment
0 Petitions
Accused Products
Abstract
An auto-injector for administering a dose of a liquid medicament (M) is present having a tubular chassis telescopable in a tubular case, a carrier subassembly comprising a tubular carrier slidably arranged relative to the chassis inside the case, where the carrier is adapted to contain a syringe with a hollow injection needle. The injector also has a drive spring and a plunger for forwarding load of the drive spring to a stopper of the syringe, wherein the syringe is lockable for joint axial translation with the carrier. A control spring is arranged around the carrier for translating the carrier in a proximal direction (P) for insertion of the needle through the chassis into an injection site.
26 Citations
16 Claims
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1-15. -15. (canceled)
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16. An auto-injector for administering a dose of a liquid medicament (M), comprising:
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a tubular chassis telescopable in a tubular case, a carrier subassembly comprising a tubular carrier slidably arranged relative to the chassis inside the case, the carrier adapted to contain a syringe with a hollow injection needle, a drive spring and a plunger for forwarding load of the drive spring to a stopper of the syringe, wherein the syringe is lockable for joint axial translation with the carrier, a control spring arranged around the carrier for translating the carrier in a proximal direction (P) for insertion of the needle through the chassis into an injection site, wherein the control spring is arranged to bias the case against the chassis in a distal direction (D) so as to extend the chassis out of a proximal end (P) of the case, wherein an insertion depth of the needle is defined by the carrier abutting the chassis in a predefined position, wherein the case is arranged to release or allow release of the control spring for needle insertion on translation of the case in the proximal direction (P) relative to the chassis against the bias into an advanced position.
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Specification