US Patent 7426803 Swinging and sliding door for rail vehicles

An angular lever for guiding and moving a door leaf is rotatably mounted in a horizontal plane in the direct vicinity of the door frame. One limb of the angular lever is permanently connected to a guide rail of the door leaf, and the other limb temporarily engages with a control element on a guide unit to swing the door leaf. In order to open completely and subsequently close the door leaf, a guide arm of the door leaf is operatively connected to the control element. During the closing movement of the door leaf, an operative connection of the guide arm to the control element is released and the other limb of the angular lever engages again with the control element. When the angular lever assumes its home position, it presses the door leaf firmly against a door seal and locks the door leaf.