Patent ID: 8500146

Claim:
A skateboard comprising: a deck, elongated along a longitudinal axis, having front and rear portions with respect to the longitudinal axis, the deck also having a perpendicular vertical axis pointing upward as the board rests on the ground, and a perpendicular lateral axis extending from left to right from the perspective of a rider standing on the board facing the front of the board, separated by a lateral midline into a left side and a right side; a first wheel assembly attached to the front portion of the board; a second wheel assembly attached to the rear portion of the board; wherein the first and second wheel assemblies each comprise a truck and two wheels; wherein each truck comprises: a base portion fixedly attached to the board, having a first substantially vertical surface facing the left side of the deck, and a second substantially vertical surface facing the right side of the deck; a kingpin attached to the base, wherein the kingpin has a longitudinal axis within the lateral midline plane which is at an oblique angle from the horizontal plane of the board; a hanger attached to the kingpin, so that the hanger is free to rotate about the longitudinal axis of the while the base remains stationary; one or more axles connected to the hanger; two axles attached to the hanger, the longitudinal axes of the axles in their nominal position being substantially parallel to the lateral axis of the deck; a bumper yoke fixedly attached to the hanger, having a first arm and a second arm, the first arm having an inner surface adjacent to said first substantially vertical surface of the base, and the second arm having an inner surface adjacent to said second substantially vertical surface of the base; a first compliant member disposed between the first arm of the bumper yoke and the first substantially vertical surface of the base, and a second compliant member disposed between the second arm of the bumper yoke and the second substantially vertical surface of the base, wherein the first and second compliant members are configured to provide a compression force that increases as the hanger rotates away from its nominal position around the longitudinal axis of the kingpin.