Abstract: The present invention relates to a connector for use in supply lines for intravenous infusions. The object of the present invention is to provide a connector designed in such a way that secure assembly of the infusion arrangement is made possible, and such that the connecting piece may be nondisconnectably or nonreleasably locked to the mating piece at a later time. This object is achieved by providing securing of the connection, in particular by way of a thread, and providing a separately operable capping sleeve that covers the securing.

Abstract: The invention concerns an arrangement to couple an intravenous hose having a roller clamp with an infusion pump. A hose clamp has clamping surfaces in the form of legs which can move relative one another about a hinge, the legs being enveloped on their outside by a biased clamping spring, and the device is formed by an expander rib that is fastened on the inside of the door and can be brought into engagement with the legs of the hose clamp so to produce the open position after closing the door to expand the legs. The housing has a receiver, into which the hose clamp can be snapped, and that a locking device is present in the housing that prevents the closing of the door if the hose clamp is not inserted into the receiver and permits the closing of the door when the hose clamp is fully inserted.