Patent ID: 6796394
Filing Date: 2004-09-28
Classification: A63C

Abstract:
A skateboard comprising:a board member having opposite top and bottom surfaces, and front and rear ends; a front roller mounted rotatably on said bottom surface of said board member, and disposed adjacent to said front end of said board member; a rear roller mounted rotatably on said bottom surface of said board member, disposed adjacent to said rear end of said board member, and having a diameter less than that of said front roller; left and right intermediate rollers mounted rotatably on said bottom surface of said board member between said front and rear rollers, and each having a diameter the same as that of said front roller; first and second transmission units connected respectively to said left and right intermediate rollers; a power driving unit connected to said first and second transmission units; and a control unit mounted on said top surface of said board member, and electrically connected to said driving unit so as to be operable among a first mode, in which said driving unit is activated to drive said left and right intermediate rollers through said first and second transmission units, a second mode, in which said driving unit is deactivated, a third mode, in which said driving unit is activated to drive one of said left and right intermediate rollers through said first transmission unit, and a fourth mode, in which said driving unit is activated to drive the other one of said left and right intermediate rollers through said second transmission unit.