Vehicle suspension including dock height holding device

An air spring assembly, comprising:

• a bead plate that is adapted to be supported on a first portion of a vehicle suspension;
• a retainer plate that is adapted to be supported on a second portion of the vehicle suspension, which is moveable relative to the first suspension portion;
• a first bumper portion supported on the bead plate, having a body with an axis near a center of the body and having a first surface configuration;
• a second bumper portion supported on the retainer plate, having a body with an axis near a center of the body and having a second surface configuration;
• and
• wherein the bumper portions are coaxially aligned and at least one of the bumper portions is selectively rotated about the axis such that the surface configurations on the bumper portions selectively maintain a desired spacing between the bead plate and the retainer plate.

A vehicle suspension assembly, comprising:

• a first support member attached to a body of the vehicle;
• a second support member that moves relative to the first support member;
• at least one air spring coupled with the first and second support members;
• and
• a jounce bumper within the air spring having a first portion supported relative to the first support member and a second member supported to move with the second support member, the jounce bumper portions each including a surface configuration that maintains a first minimal spacing between the support members when the first and second portions are in a first alignment position, and maintains a second spacing between the support members when the first and second portions are in a second alignment position, the surface configuration of each jounce bumper portion including at least one projection that comprises a wedge shaped piece that extends in an axial direction and the projections are circumferentially spaced about the bumper portions, respectively, the projections being interdigitated with spaces between the projections and wherein the projections on the first portion are aligned with the spaces on the second portion when the bumper portions are in the first alignment position such that the projections do not contact each other when the first and second portions arc in the first alignment position, the at least one projection on the first portion contacting the at least one projection on the second portion when the first and second portions are in the second alignment position.

An air spring assembly, comprising:

• a bead plate that is adapted to be supported on a first portion of a vehicle suspension;
• a retainer plate that is adapted to be supported on a second portion of the vehicle suspension, which is moveable relative to the first suspension portion;
• a first bumper portion supported on the bead plate and having a first surface configuration;
• at second bumper portion supported on the retainer plate and having a second surface configuration;
• and
• wherein the bumper portions are selectively aligned such that the surface configurations on the bumper portions selectively maintain a desired spacing between the bead plate and the retainer plate, the surface configurations each including projections that comprise wedge shaped pieces that extend in an axial direction and are circumferentially spaced about the bumper portions, respectively, the projections being interdigitated with spaces between the projections and wherein the projections on the first portion are aligned with the spaces on the second portion when the bumper portions are in a first alignment position and the projections on the first portion are aligned with the projections on the second portion when the bumper portions are in a second alignment position.