Patent ID: 6382519
Filing Date: 2002-05-07
Classification: A63H

Abstract:
An unit track for assembly with other unit track members to form a track portion and comprising:a bottom plate; a single protuberance and a single coupling slot formed at a center of said bottom plate, for being assembled to other track members; said protuberance being constructed for rotational movement within a coupling slot of an associated track member, a pair of trapezoidal coupling pieces and a pair of trapezoidal recesses formed on said bottom plate and at both sides of said protuberance and said coupling slot; a pair of pillar shaped walls upstanding at both ends of said bottom plate; a trapezoidal projection and a trapezoidal coupling channel formed on each of said pillar shaped walls in a symmetric form, for being coupled to other track members; and said trapezoidal coupling pieces and trapezoidal recesses and said trapezoidal projections and trapezoidal coupling channels being configured to permit a trapezoidal coupling piece of a first track member to be loosely moved within the trapezoidal recess of a second, associated track member and to permit a trapezoidal projection on a pillar shaped wall of the first track member to be loosely moved into and out of a trapezoidal coupling channel of a pillar shaped wall of the second, associated track member while the first and second track members are maintained coupled together by the protuberance of the first track member within the coupling slot of the second track member so that a straight track portion assembled from said track members can be changed to a curved track portion and vice versa.