Drug Injection Device with Visual End-Of-Contents Indicator System
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United States of America Patent
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app pub date -
Jan 8, 2016
filing date -
Jan 8, 2015
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Abstract
Medical device (1) for injecting a set dose of an injectable product into a patient, the device having a cartridge containing the injectable product, a movable dosing driver (11) and a movable dose setting driver (15), and an end-of-contents indicator system (13) having counting means (17) with a counting part (19), and indication means (21) with a signal part (23), wherein the counting part (19) and the signal part (23) are formed with cooperating end-of-contents contact faces (25′, 25″), wherein the signal part (23) is movable between a first indication position and a second indication position, wherein the signal part (23) comprises a biasing means (33) for biasing the signal part (23) towards the first indication position, wherein the counting part (19) comprises a coupling (26), said coupling (26) is configured for operably connecting the counting part (19) to the dose setting driver (15), such that moving of the dose setting driver(15) towards increasing the set dose moves the contact face (25′) of the counting part (19) in relation to the contact face (25″) of the signal part (23) towards engagement of the contact surfaces (25′, 25″), and such that moving of the dose setting driver (15) towards decreasing the set dose moves the contact face (25′) of the counting part (19) away from the contact face (25″) of the signal part (23), wherein the counting part (19) is configured for providing engagement of the contact faces (25′, 25″) when the set dose reach the end-of-contents in the cartridge, and wherein the counting part (19) is configured for moving the signal part (23) towards the second indication position when the set dose is exceeding the end-of-contents in the cartridge. This way, if the user tries to dial a dose of drug beyond the amount remaining in the cartridge, an additional indication is given to the user via a distinctive area (41/43) of the signal part (23) becoming visible through a window (7) of the injector.
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