Device for the dosed administration of a fluid product, adapted for the replacement of a container

摘要

A device for administering a fluid product, the device including a first housing part provided with a receiver for the product, a second housing part detachably connectable to the first housing part, a piston rod held such that it can be displaced for the exertion of an emptying movement, an actuatable or releasable drive element for the piston rod, a coupling element including a coupling input element that couples the drive element to the piston rod in a coupling engagement, transmits a driving force of the drive element to the piston rod, and triggers the emptying movement, and a decoupling element displaceably connected to the second housing part and coupled to the first housing part such that it is displaced, by a movement of the housing parts in relation to each other when the housing parts are separated into a decoupling position wherein the piston rod is decoupled from the coupling input element.

主权项

1. A device for administering a fluid product, said device comprising:
a) a first casing part and a second casing part connected to each other; b) a container accommodated in the first casing part; c) a piston accommodated in the container and moveable in an advancing direction; d) a piston rod with an outer thread and moveable in a delivery movement in the advancing direction, wherein the piston rod and the piston comprise a conveying means; e) a dosing member for setting a dosage by performing a dosing movement; f) a drive member operable for moving the piston rod; and g) a coupler comprising a coupler input member which couples the drive member to the piston rod in a coupler engagement and transfers a drive force of the drive member to the piston rod to cause the delivery movement; wherein h) the second casing part forms a linear guide for the drive member such that the drive member is linearly guided relative to the second casing part and is moveable in and counter to the advancing direction; i) the dosing member is coupled to the drive member and by the dosing movement the drive member is moved counter to the advancing direction and extends out of the second casing part; j) the drive member is sleeve-shaped and comprises a thread; k) the coupler input member is sleeve-shaped and comprises a thread complementary to the thread of the drive member for threaded engagement with the drive member; l) a drive movement of the drive member causes a rotational movement of the coupler input member; and m) wherein a rotational movement of the coupler input member causes the delivery movement of the piston rod.