Patent ID: 8834431
Filing Date: 2014-09-16
Classification: A61M

Abstract:
1. An injection pen for the administering of a fluid product, the device comprising: a housing; a receptacle holder detachably coupled to a distal end of the housing for holding a reservoir containing the product and an injection needle coupled to a distal end of the receptacle holder; a delivery element for delivering the product from the reservoir, wherein the delivery element is movable relative to the housing along a thrust axis, and wherein the delivery element comprises an internal thread having a threaded axis running along the thrust axis; and a thread element comprising an external thread in engagement with the internal thread of the delivery element, wherein the thread element is configured to be fixed relative to the housing along the thrust axis and configured to be set into a rotary movement about the thrust axis to advance the delivery element along the thrust axis; wherein the delivery element is arranged so as to be locked against relative rotation with respect to the housing when moved along the thrust axis in a distal or proximal direction; and wherein, when the receptacle holder is detached from the housing the delivery element is moveable linearly into the housing for resetting to an initial position by pressing the delivery element in a proximal direction, said pressing causing the thread element, via its engagement with the internal thread of the delivery element, to rotate with respect to the housing.