Closing cap for vehicle fuel tank filler neck, with outer part able to move against return device in direction of central axis relative to inner part

摘要

The cap (1) has an inner part (2) with engaging element (8) to lock onto the neck and an outer part (2) over the inner one, able to be turned relative to it about the central axis (6). A traveling device with engaging projections (32-35) is between them. The outer part can move in the direction of the central axis against a return device (40-43) relative to the inner part.