Truck assembly

A roller-skate, comprising:

• a boot having a sole,
• a mounting plate secured to the sole of the boot, where the mounting plate includes a first mounting bracket and a second mounting bracket, each mounting bracket having a first arm, a second arm and a ridge, where
• the first arm has a first surface defining a first opening through the first arm,
• the second arm has a second surface defining a second opening in the second arm, where the first opening and the second opening share a rotation axis, and
• the ridge extends parallel with the rotation axis at least partially between the first arm and the second arm;
• a cushion having a front surface and a rear surface opposite the front surface, a first lateral surface and a second lateral surface, where the front surface defines a concave segment, the rear surface defines a notch that extends towards the concave segment and receives and seats in the ridge of the mounting bracket, and where each of the first lateral surface and the second lateral surface defines an opening to receive a cushion locking pin;
• an axle assembly having a wheel shaft and a truck support, where,
• the truck support includes a third surface that defines a first opening through the truck support, a fourth surface that defines a second opening through the truck support, a first cushion support arm and a second cushion support arm,
• where the first opening through the truck support is coaxial with the rotation axis of the mounting bracket,
• the wheel shaft passes through the second opening of the truck support to provide a first wheel shaft and a second wheel shaft, where the first wheel shaft extends along a central axis from the truck support and the second wheel shaft extends along the central axis from the truck support in a direction opposite the first wheel shaft, where the central axis is perpendicular to the rotation axis of the mounting bracket,
• each of the first cushion support arm and the second cushion support arm has a threaded surface defining a cushion locking pin opening, where the first lateral surface of the cushion is adjacent the first cushion support arm and the second lateral surface of the cushion is adjacent the second cushion support arm;
• a cushion locking pin having a head and a shaft that extends from the head, where the shaft has a threaded surface portion that can releasably engage the threaded surface of the cushion locking pin opening and where at least a portion of the shaft extends through the opening to receive the cushion locking pin in the cushion;
• and
• a swing pin that passes through the first opening of the mounting bracket, the opening through the truck support and at least partially through the second opening of the mounting bracket, where the swing pin releasably joins the cushion and the axle assembly to the mounting bracket;
• and
• a wheel mounted on each of the first wheel shaft and the second wheel shaft.

An elastomeric cushion for a truck assembly, comprising:

• a front surface;
• a rear surface opposite the front surface;
• a first lateral surface;
• and
• a second lateral surface, where the front surface defines a concave segment, the rear surface defines a notch that extends towards the concave segment, and where each of the first lateral surface and the second lateral surface defines an opening through the elastomeric cushion.