A skateboard and a variable-rate elastomeric steering control spring include a boardside unitary body formed of an exterior first elastomer having a first durometer on the Shore “A” scale, and an interior second elastomer coupled to the first elastomer and extending at least a length of the exterior first elastomer, the second elastomer having a second durometer on the Shore “A” scale and a through hole disposed to receive a kingpin of the skate truck; a roadside unitary body formed of an exterior third elastomer having a third durometer on the Shore “A” scale, and an interior fourth elastomer coupled to the third elastomer and extending at least a length of the exterior third elastomer, the interior fourth elastomer having a fourth durometer on the Shore “A” scale and a through hole disposed to receive the kingpin; and wherein the first, second, third and fourth elastomers comprise at least two durometers on the Shore “A” scale between 65A and 100A to enable the boardside unitary body and the roadside unitary body to form the variable-rate elastomeric steering control spring when disposed on the king pin of the skate truck.

A snow sport shock absorbing system includes: a snow sport device and a shock absorbing device, which is configured to attach to the snow sport device, such that the shock absorbing device absorbs shocks incurred from using the snow sport shock absorbing system for movement on a ground surface. The shock absorbing device includes an upper mounting structure, a lower mounting structure, and a shock absorber which is connected between the upper lower mounting structures.

The present invention provides a bidirectional energy-transfer system comprising: a thermally and/or electrically conductive concrete, disposed in a structural object; a location of energy supply or demand that is physically isolated from, but in thermodynamic and/or electromagnetic communication with, the thermally and/or electrically conductive concrete; and a means of transferring energy between the structural object and the location of energy supply or demand. The system can be a single node in a neural network. The thermally and/or electrically conductive concrete includes a conductive, shock-absorbing material, such as graphite. Preferred compositions are disclosed for the thermally and/or electrically conductive concrete. The bidirectional energy-transfer system may be present in a solar-energy collection system, a grade beam, an indoor radiant flooring system, a structural wall or ceiling, a bridge, a roadway, a driveway, a parking lot, a commercial aviation runway, a military runway, a grain silo, or pavers, for example.

Method and apparatus directed to cushioned concave pads, cushioned traction pads, and/or grip tape for self-balancing vehicles. The method and apparatus includes front cushioned pads and/or front cushioned traction pads having top surfaces and bottom surfaces; attaching the bottom surfaces of the front cushioned pads and/or the front cushioned traction pads to a first deck portion disposed at a first end of a frame; selecting rear cushioned pads and/or rear cushioned traction pads having top and bottom surfaces. The top surfaces of the rear cushioned pads and/or rear cushioned traction pads can have a rear kicktail extending integrally upwardly and rearwardly. The method and apparatus further include attaching the bottom surfaces of the rear cushioned pads and/or the rear cushioned traction pads to a second deck portion disposed at a second end of the frame.

An electric weight sensing skateboard using one or more strain gauge systems to detect rider-induced strain on one or both trucks, an inertial sensor to detect accelerations and balance position, and wheel speed sensors. Throttle is controlled by rider position, for example, lean forward to increase speed, lean back to slow down. Several drive methods include a driver position detection velocity setpoint control, torque setpoint control, and direct velocity/torque control. A throttle remote is note required. Rider weight activates the motors.

A self-propelled, one-wheeled vehicle may include a suspension system configured to dampen up and down motion of a board relative to the axle of a central wheel assembly when the vehicle encounters obstacles and bumps on a riding surface. Illustrative suspension systems include a shock absorber, a rocker, a pushrod, bell cranks, and/or a swingarm that couple the axle to the board. The suspension system may be disposed completely below a foot deck of the vehicle.

The invention relates to a sports item (1), comprising a carrier (3) for a coupling device (25) for accommodating a user and including at least one distributing device (2) for the loads and/or forces to be transmitted to the sports item (1), which at least one distributing device (2) connects the carrier (3) to the sports item (1) via a joint arrangement, the latter having at least one pivoting arm (4, 5; 6, 7), which is pivotably connected, in each case via a joint (8, 9; 10, 11), to the sports item (1) at one arm end of the pivoting arm and to the carrier (3) at the other arm end of the pivoting arm, wherein the carrier (3) is movable from a starting position, counter to the restoring force of at least one elastic restoring element, to a balancing position in which the carrier is brought closer to the sports item (1). The sports item (1) according to the invention is characterized in that the at least one restoring element is an elastically deformable spring element (12; 13), which is held at one end on the carrier (3) and at the other end on the sports item (1).

A resilient rod that provides adjustable directional resistance is disclosed. In one aspect of the invention, a resistance level may be determined based on a thickness of the rod and a position of an applied force with respect to a fulcrum point. In another aspect of the invention, at least one spine may be attached to the beam to increase a diameter of the beam along one axis. The resistance level may be determined based on the thickness of the rod, the position of the applied force and an orientation of the at least one spine with regard to the direction of the applied force. In other aspects of the invention, the resilient rods may be incorporated into a golf club that provides for adjustable resistance levels.

A leg assembly, and a shock absorption mechanism for a pole are provided. The shock absorption mechanism comprises a pole body and a leg assembly, wherein the leg assembly comprises a support leg, a tray surrounding the support leg, and a connecting sleeve for connecting the pole body inserting from the top of the support leg. When a bottom of the pole body is inserted into the connecting sleeve and tightly resists against the elastic limiting clamps, the elastic limiting clamps will be pushed outward and limited in the guiding slots of the support leg, so that the connecting sleeve with the pole body can move upward and downward relative to the support leg. There is a mounting space for the shock absorption spring between the support leg and the connecting sleeve, and the support leg has a trend of moving downward due to resistance from the shock absorption spring.

A movable dasher board system optimizes user safety in a hockey rink or similar arena. A bottom structure, provided by a sliding bottom surface or roller assembly, has low friction characteristics, typically a μ.sub.s of 0.05 or less with respect to ice if a sliding surface, or if roller bearings an effective coefficient of rolling friction 0.04 or less. A dasher board assembly is operatively connected to and extends upwardly from the bottom structure. Biasing and impact force absorbing devices (such as pneumatic or hydraulic or spring-encasing telescoping tubes, or foam, gel, or compression springs) bias the bottom structure and dasher board assembly to a desired position and absorb the impact of a human hitting the dasher board assembly to minimize the possibility of injury to the human. The system may be installed in a pre-existing rink or other arena.