Patent ID: 8679070

Claim:
An appliance for administering a fluid product, comprising: a reusable base unit comprising a drive device, and a replaceable cartridge detachably connectable with the base unit and comprising a product container for the fluid product, wherein the base unit further comprises a drive element able to be moved by the drive device in a rotational movement around a rotational axis, wherein the cartridge further comprises a movable transmission element complementary to the drive element and having an external thread for guiding movement of the transmission element, wherein the rotational movement of the drive element causes the transmission element to move, guided by the external thread, in a screwing movement comprising an axial movement and a rotational movement, said screwing movement causing an ejection of the fluid product from the product container, wherein the drive element and the transmission element are able to be detachably connected to each other for transmitting the rotational movement, and wherein the transmission element comprises a sleeve with an inside, the sleeve at least partially enveloping the drive element when the cartridge is connected with the base unit, and engaging the drive element on the inside.