Single-use auto-injector

• Main Authors: Jorgensen, Jorgen, Plambech, Christian, Ohlenschlaeger, Rasmus, Knudsen, Hans Stenberg
• Format: Patent
• Language: English
• Published: 22.07.2021
• Subjects: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE

Abstract The present invention relates to a single-use auto-injector (1) for injection of a dosage of a drug into a human body, comprising a housing, and a dosing unit 5 arranged in at least part of the housing, the dosing unit comprising, a needle, a drug container comprising the drug, a piston movable in the container, a first mechanical power supply for supplying a first mechanical force for moving the piston to deliver a drug to the human body, an activation mechanism configured to release the first mechanical power of the first mechanical power supply, and a 10 mechanical escapement mechanism for controlling the movement of the piston, wherein the auto-injector comprises a second mechanical power supply for supplying a second mechanical force, the auto-injector having, a first state in which the needle is protected from needle damage or contamination, a second state in which the needle is ready to penetrate the human body for dosing the 15 drug, a third state in which the needle has penetrated the human body and is ready to dose, and a fourth state in which the needle is shielded to avoid unintended needle sticks, wherein the second mechanical power supply is configured to shift state of the auto-injector from the third state to the fourth state by releasing the second mechanical power. Figure 2 Fig. 1 Fig. 2