Abstract: A scooter having a simple harmonic drive including front and rear wheels, a frame connecting the two wheels, a steering mechanism for steering the front wheel, a platform of sufficient size to allow a rider to stand thereon, the platform being mounted to said frame near its forward end and being spring biased at its rear end to be urged upwardly, a driving clutch connected to the rear wheel and to the rear of said platform so that shifting of the center of gravity of the rider fore and aft creates an up-and-down simple harmonic driving movement of the rear of the platform and the driving movement of the scooter. In one form, a spring is mounted on the frame and engages the rear of the platform to urge it upwardly. In modified form, the platform is cantilevered from a bracket secured to the front portion of the frame and is a spring itself so that no separate spring is used to provide the simple harmonic drive.

Abstract: An improved sailboard in which the sail assembly is mounted to the board in a manner to allow pivoting about an axis inclined rearwardly and also about a horizontal pivot pin. The sail assembly is supported from a shaft secured in the board and having an axis which is inclined toward the rear of the board. A spindle is mounted by suitable bearing on the inclined shaft and the sail assembly is secured to the spindle by a horizontal pivot pin. The sail assembly includes the sail, a wishbone tiller, a mast and a boom. The boom is secured to the horizontal pivot pin and the mast is pivotally mounted to the boom with the sail supported by both. A pawl is provided to secure the mast in its operating position with respect to the boom and when released allows the mast to pivot toward the boom to collapse the sail.

Abstract: The occupant propelled recreational or amusement device and playground toy includes an elongated central support having a bearing device or rotatable hub affixed at its upper end. The hub defines a rotational axis which is inclined with respect both to a vertical reference line and to a horizontal reference plane. A radially outwardly extending cross member is attached to a rotating part of the hub and has depending from its distal end portion a plurality of elongated flexible supporting members which suspend a plurality of rings for omnidirectional movement. The rings are capable of being moved upwardly and downwardly in an arcuate fashion, are capable of being moved forwardly and backwardly in an arcuate as well as in a circular fashion about a stationary central support, and are capable of moving radially outwardly in arcuate fashion due, for example, to centrifugal force.

Abstract: The occupant propelled recreational or amusement device and playground toy includes an elongated central support having a bearing device or rotatable hub affixed at its upper end. The hub defines a rotational axis which is inclined with respect both to a vertical reference line and to a horizontal reference plane. A radially outwardly extending cross member is attached to a rotating part of the hub and has depending from its distal end portion at least one elongated flexible supporting member which suspends a seat for omnidirectional movement. The seat is capable of being moved upwardly and downwardly in an arcuate fashion, is capable of being moved forwardly and backwardly in an arcuate as well as in a circular fashion about a stationary central support, and is capable of moving radially outwardly in arcuate fashion due, for example, to centrifugal force.