The utility model relates to the field of skateboard fitting, specifically relating to an adapter for surfskate comprising a fixing plate, a rotating plate, an centre shaft screw and a locking nut wherein said fixing plate and rotating plate link together via centre shaft screw and locking nut; a torsion spring is sleeved on centre shaft screw between fixing plate and rotating plate, and the top of torsion spring is fixed on fixing plate, and the bottom is fixed on rotating plate; said centre shaft screw located on top and bottom of rotating plate are sleeved with a thrust bearing wherein thrust bearing on the top of rotating plate is provided within torsion spring; on the side of fixing plate closing to rotating plate is equipped with limiting groove and on the side of rotating plate closing to fixing plate is equipped with limiting block matching with limiting groove.

Systems and methods for intelligent data center power management and energy market disaster recovery comprised of data collection layer, infrastructure elements, application elements, power elements, virtual machine elements, analytics/automation/actions layer, analytics or predictive analytics engine, automation software, actions software, energy markets analysis layer and software and intelligent energy market analysis elements or software. Plurality of data centers employ systems and methods comprising a plurality of Tier 2 data centers that may be running applications, virtual machines and physical computer systems to enable data center and application disaster recovery from utility energy market outages. Systems and methods may be employed to enable application load balancing and data center power load balancing across a plurality of data centers by moving application and power loads from one data center location using power during peak energy hours to another data center location using power during off-peak hours.

Systems and methods for intelligent data center power management and energy market disaster recovery comprised of data collection layer, infrastructure elements, application elements, power elements, virtual machine elements, analytics/automation/actions layer, analytics or predictive analytics engine, automation software, actions software, energy markets analysis layer and software and intelligent energy market analysis elements or software. Plurality of data centers employ systems and methods comprising a plurality of Tier 2 data centers that may be running applications, virtual machines and physical computer systems to enable data center and application disaster recovery from utility energy market outages. Systems and methods may be employed to enable application load balancing and data center power load balancing across a plurality of data centers by moving application and power loads from one data center location using power during peak energy hours to another data center location using power during off-peak hours.

The disclosure relates generally to an electric skateboard. The electric skateboard may include a deck, at least a rechargeable battery pack, a control module, and a communications module, a pair of trucks mounted to the deck, a plurality of wheels mounted on axles of the trucks; and one or more motors installed in one or more of the plurality of wheels for propelling the electric skateboard. The deck may include a front end, a rear end, a top plate. The rechargeable battery pack, control module, and communications module may be enclosed in an enclosure attached to the deck.

A roller board has axles provided with castors and secured at the front and rear ends of a board deck such that a steering movement is transferrable to the axles by a person on the board deck by lateral shifting of weight. Steerability and problem-free operation are improved. Substantially rigid booms, one directed to the front and one directed to the rear, are provided at the front and rear ends of the board deck, respectively. A support arm pointing in the direction of the central axis of the board deck is rigidly fastened to each boom. The support arms are pivotable on the two sides about a pivot axis inclined in the direction of travel by 40° to 50° relative to the plane of the board deck. The axle of a single castor is mounted rotatably in or on each hub, with the pivot joint inside the castor.

A skateboard includes a deck, at least a front wheel set and a rear wheel set. The front wheel set, which is arranged at a bottom of the deck at a position close to a front end thereof, includes at least one rigid and rotatable front wheel frame and at least two front wheels. The rear wheel set, which is arranged at a bottom of the deck at a position close to the rear end thereof, includes at least one rigid and non-rotatable rear wheel frame and at least two rear wheels. The outer side of the wheel is circular or arc-shaped. The structure of the skateboard allows the user to change a center of gravity and to lift the sides of the board with foot, so as to only rely on the outer arc of the left or right front and rear wheels to slide, while the rotatable front wheel frame in the left or right side may still be utilized for rotating in the forward direction, which allows a skateboard experience of forward or changing the travelling direction.

In a preferred embodiment a wheeled platform apparatus and method for use in rolling on a surface are provided. The apparatus includes a platform having a top surface, a bottom surface, a front portion, a center portion, a rear portion, and a first wheel and a second wheel that interface with or are positioned below the bottom surface of the platform to facilitate rolling movement of the platform. The apparatus may further include an attachment device interfacing with the top surface and the footwear, as well as a footrest to support the forefoot of another foot, or footwear.

An inline skate boot contouring designed for improved grinding capabilities may include a soul plate with an inner edge and an outer edge, the inner edge being configured to abut a frame on an inline skate boot during use, wherein the soul plate includes a toe end, a heel end, and a middle portion positioned between the toe end and the heel end; a soul grind angle face extending upward from the outer edge of the soul plate at an angle greater than 90° with respect to a plane of the frame; a cess slide face extending upward from an outer edge of the soul grind angle face at an angle greater than 90° with respect to the frame; and a backslide surface extending upward from a top edge of the cess slide face such that a distal edge of the backslide surface is configured to abut the inline skate boot during use.

An inline skate boot contouring designed for improved grinding capabilities may include a soul plate with an inner edge and an outer edge, the inner edge being configured to abut a frame on an inline skate boot during use, wherein the soul plate includes a toe end, a heel end, and a middle portion positioned between the toe end and the heel end; a soul grind angle face extending upward from the outer edge of the soul plate at an angle greater than 90° with respect to a plane of the frame; a cess slide face extending upward from an outer edge of the soul grind angle face at an angle greater than 90° with respect to the frame; and a backslide surface extending upward from a top edge of the cess slide face such that a distal edge of the backslide surface is configured to abut the inline skate boot during use.

An apparatus for automatically adjusting tension on retention member to hold multiple objects together. Examples include using retention apparatus to obtain optimal fit and use of a human wearable item such as article of footwear. Sensors may be used to sense changes in movement of the article of footwear, of the person wearing it, or of a third object such as a vehicle carrying the person. A retention member may surround at least a portion of the objects, and an actuator may be included that automatically rotates a rotating member such as a gear or pulley that may be coupled to the retention member. The rotating member may be configured to automatically adjust tension on the retention member many times per second based on control signals from control logic responsive to the sensors.