초록 ▼

A roller ski board similar to an ordinary snow ski board having a board body with bending elasticity and repellant property, and having at least one of single roller at its central portion and with or without smaller twin rollers at its front and rear edge portions, pivoted rotatively on an under su

A roller ski board similar to an ordinary snow ski board having a board body with bending elasticity and repellant property, and having at least one of single roller at its central portion and with or without smaller twin rollers at its front and rear edge portions, pivoted rotatively on an under surface of the board body along its longitudinal axis. The rollers have a lubricity and wear proof property with repellant elasticity so as to absorb the vibrations and shock added to the board from or to the ground during sliding. The rollers are arranged such that each external side periphery of the rollers is gradually wider from the central portion to a front and rear edge so that the external side peripheries of each roller does not protrude over the contour curvature of the board body. The rollers are also arranged consecutively from both the front and rear edges to the central portion such that each running surface of the rollers contacts with an arc curvature slightly curved upwardly over the ground. The single rollers have different diameters and the twin rollers the same diameter, and therefore are arranged at different ground contact levels so as to reduce frictional resistance during sliding. The vertical sectional surface of each single roller forms a small concave curvature with the contacting ground to achieve edging effects similar to an ordinary snow ski board.

대표청구항 ▼

1. A roller ski board comprising:a board body having a central portion and a longitudinal extent defined by respective side edges from a front edge portion to a rear edge portion, the board body having an under-surface having a longitudinal axis; means forming a plurality of rotatable rollers, the p

1. A roller ski board comprising:a board body having a central portion and a longitudinal extent defined by respective side edges from a front edge portion to a rear edge portion, the board body having an under-surface having a longitudinal axis; means forming a plurality of rotatable rollers, the plurality of rollers comprising a plurality of single rollers of substantially the same diameter disposed consecutively on the under-surface of the board body in the central portion; means forming adjacent each respective front and rear edge portions a rotatable roller means comprising a pair of rollers arranged respectively consecutively along the longitudinal axis with the single rollers; the board body having a curved contour extending from the front edge portion to the rear edge portion, the contour being concave with respect to a ground surface; and the single rollers and the pair of roller means having a radial periphery forming a tangential arc of an upward concave curvature with respect to the ground surface and wherein the arc extends between the front edge portion and the rear edge portion and has an orientation substantially opposite to the curved contour of the board body.