Pressure tank for gas-operated vehicle

A pressure tank for storing gas and for assembly in a gas-operated vehicle, the pressure tank comprising:

• a rotationally symmetrical elongate form having a central region with a cylindrical shape and two ends that are closed off with curved pole caps, and having a wall enclosing a hollow space for storing the gas;
• a metal connection piece, being a boss, on each of said pole caps;
• said wall including a reinforcement layer made of fiber-reinforced plastics material and an inner liner for sealing;
• a bush connected to said boss;
• a rigid pressure ring;
• a resilient element;
• said liner being disposed between the bush to boss connection and said pressure ring along a longitudinal axis L of the pressure tank;
• said resilient element being supported on said bush between said pressure ring and said bush and configured to press said pressure ring onto said liner and thus to press said liner onto said boss;
• said pressure ring being displaceable relative to said bush in a direction of the longitudinal axis L of the pressure tank;
• and
• at least one of said pressure ring or said bush being formed with a stop configured to transmit a force between said pressure ring and said bush in the direction of the longitudinal axis L directly via the stop when said resilient element is compressed to a sufficient degree.