Medical device and method of assembly
First Claim
1. A drug delivery device for administering a liquid drug to a patient comprising:
- a cartridge filled with the liquid drug and having a piston slidably disposed therein,a main housing component anda drive mechanism, wherein the drive mechanism is accommodated inside the main housing component,wherein the drive mechanism is operably engageable with the piston of the cartridge to expel a dose of the liquid drug from the cartridge and wherein the drive mechanism comprises a piston rod with a pressure piece at a distal end section to but against a proximal end face of the piston of the cartridge;
wherein at least the pressure piece located inside the main housing component comprises a thermoplastic material having an additive embedded and homogeneously distributed in its bulk,wherein the additive is adapted to provide a visually perceptible signal when exposed to electromagnetic radiation andwherein the electromagnetic radiation is within one of a first spectral range, a second spectral range, or a third spectral range.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a medical device for administering a medicinal product to a patient comprising at least one component (2, 8, 10, 12, 14, 15, 16, 17, 18, 20, 22, 24, 26, 28) comprising a material having an additive embedded therein, wherein the additive is adapted to provide a visually perceptible signal when exposed to electromagnetic radiation. The invention is particularly intended for drug delivery devices, such as e.g. of pen-type injectors. With the visually perceptible signal embedded in the at least one component, visually controlled assembly of such devices can be improved. Additionally the invention provides an effective means antagonize counterfeiting of drugs and of medical devices.
8 Citations
11 Claims
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1. A drug delivery device for administering a liquid drug to a patient comprising:
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a cartridge filled with the liquid drug and having a piston slidably disposed therein, a main housing component and a drive mechanism, wherein the drive mechanism is accommodated inside the main housing component, wherein the drive mechanism is operably engageable with the piston of the cartridge to expel a dose of the liquid drug from the cartridge and wherein the drive mechanism comprises a piston rod with a pressure piece at a distal end section to but against a proximal end face of the piston of the cartridge; wherein at least the pressure piece located inside the main housing component comprises a thermoplastic material having an additive embedded and homogeneously distributed in its bulk, wherein the additive is adapted to provide a visually perceptible signal when exposed to electromagnetic radiation and wherein the electromagnetic radiation is within one of a first spectral range, a second spectral range, or a third spectral range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification