Rolling lobe seal for an air spring assembly

An air spring assembly for use in a vehicle suspension system comprising:

• a piston configured to couple to a suspension component, the piston having an outer periphery;
• a top cap configured to couple to a vehicle frame;
• a hollow guide tube having a first end and a second end, the first end being coupled to the top cap, the second end being provided with an aperture to the hollow, the piston passing through the aperture and being disposed at least partially within the guide tube;
• a diaphragm disposed at least partially within the guide tube, the diaphragm being disposed between and attached to the piston and the top cap, the diaphragm including an inner surface defining a compressed air cavity;
• and
• a seal member having an outboard portion coupled to the guide tube proximate the second end, an inboard portion coupled to the outer periphery of the piston, and a membrane extending between the outboard portion and the inboard portion, the membrane defining a rolling lobe disposed between the guide tube and the piston.