US Patent 7540863 Medical transfer device

Medical transfer device conducts fluid from a container to a bottle having a neck, which has a closing element pierceable by a needle. Transfer device includes a first tubular-shaped part telescopically displaceable in a second tubular-shaped part between an inserted position and an extracted position. A holding part is provided inside first tubular-shaped part. A cannula extends from holding part into second tubular-shaped part without axially overlapping into the extracted position. Cannula includes a lateral opening on its distal end. Conical-shaped receiving element connects a detachably sealed connection of conical-shaped receiving elements with the container, and is connected to the inside of the cannula in the holding part. The tubular-shaped parts are detachably locked by locking tongues, so that the tip of the cannula is located inside the tubular-shaped part, avoiding injury risk. Rotation of the tubular-shaped parts determines penetration depth of the tip of the cannula in the bottle.