Abstract: Embodiments of the present invention are directed to an air spring having a flexible member which collapses into the form of a double meniscus under conditions where there is a substantial or a complete loss of air pressure. The double meniscus prevents the flexible member from rolling over the piston and/or chafing against surrounding parts of the vehicle on which the air spring is mounted. This is accomplished by incorporating a flexible member having a top portion, a bottom portion, and an expansion region between the top portion and the bottom portion of the flexible member. Embodiments of the present invention more specifically disclose an air spring comprising a piston, a top plate, and a flexible member which is affixed to the piston and the top plate, wherein the piston, the top plate and the flexible member define a pressurizable chamber.

Abstract: An air spring piston includes an outer wall having a first end and a second end that defines an inner cavity having a centerline. The piston further includes at least one mounting boss for providing off-set mounting of the piston to a support. The at least one mounting boss has a geometric center that is spaced from the centerline of the inner cavity. Additionally, substantially the entire piston may be formed from a plastic. The piston may further include a support structure having at least one strut that does not intersect the centerline of the inner cavity.