First Certificate of Addition to Pat. 9102743 by self-locking wheel, which produce braking grooved floor.

摘要

FIRST CERTIFICATE OF ADDITION TO THE PATENT N. 9102743 FOR SELF-BRAKING WHEEL, OF PRODUCING THE BRAKES ON FLOOR RIBBED. THE PERFECTION IS GIVING IN WHEEL CONTACT SURFACE ON THE SOIL FORMING CORRUGATED LONGITUDINAL WEDGES IN FIXED PORTION OF THE WHEEL ROTATING between the parties, DETERMINING OPTIMUM COHESION WITH STRETCH OF SUCH SOIL. APPLICATION IN THE MANUFACTURE OF WHEELS FOR SUPERMARKET TROLLEY AND OTHERS.