Patent ID: 9005171
Filing Date: 2015-04-14
Classification: A61M

Abstract:
1. A resettable dosing mechanism, said dosing mechanism comprising: an inner housing preferably having at least one helical groove; a dose dial sleeve rotationally engaged with the at least one helical groove of said housing; a driver provided within said housing; and a first clutch provided between said dial sleeve and said driver; a second clutch between said inner housing and said driver; wherein when a dose is set with said dose setting mechanism, said first clutch engages said dose dial sleeve and said driver to rotate together relative to said housing; wherein when the set dose is injected, said first clutch disengages said dose dial sleeve from said driver while said second clutch couples said driver to said inner housing, so that said dose dial sleeve rotates and said driver is prevented from rotating but moves axially against a spindle to expel said set dose; and wherein when resetting said dosing mechanism, said first clutch decouples said driver from said dose dial sleeve and said second clutch decouples said driver from said housing, allowing said driver to be moved to a reset position.