Abstract: The present inline skates have a braking system allowing the brakes to be used simultaneously. One embodiment of the invention comprises a frame with a rear wheel carrier and a braking wheel carrier rotatingly mounted on the frame through a first cylinder and an axle and interlocking through a notch on a braking wheel carrier and a fourth cylinder on a first rear wheel carrier while the first rear wheel and a braking wheel are rotatingly mounted on their respective carriers. Another mobile rear wheel is handled by its carrier rotatingly mounted on the second cylinder affixed to the frame. The braking force is regulated through a screw and a pair of friction cylinders. Carrier rotation limiting cylinders are affixed to the frame. The front wheels are standard fixed wheels rotatingly mounted on the frame.

Abstract: Inline skates with a braking system allowing the brakes to be used simultaneously. One embodiment of the invention comprises a frame 1 with a rear wheel carrier and a braking wheel carrier 6 rotatingly mounted on frame 1 through a first cylinder 29 and an axle 11 and interlocking through a notch 8 on a braking wheel carrier 6 and a fourth cylinder 9 on a first rear wheel carrier 7 while first rear wheel 4 and a braking wheel 5 are rotatingly mounted on their respective carriers 7, 6. Another mobile rear wheel 26 is handled by its carrier 30 rotatingly mounted on second cylinder 28 affixed to a frame 1. Breaking force is regulated through a screw 23 and a pair of friction cylinders 16. Carrier rotation limiting cylinders 10,17,31 are affixed to a frame 1. The front wheels 2, 3 are standard fixed wheels rotatingly mounted on a frame 1.

Abstract: A sports game with zig-zag ball, intended for fun and recreation. The required playing surface for this game is a flat surface about 1.5 m wide and about 20 m long, on which central line 10 and at least one pin 2 or gate 7 is placed between two fields 9. This pin 2 is crossed around when the ball 3 crosses the central line 10 behind that pin and in front of the next pin 2', and the winner of the game is the player who has the largest number of crossed pins 2 from a certain number of trials. A zig-zag ball useful as a toy or in sports is disclosed. The ball moves in a zig-zag manner when rolled out on a flat horizontal surface. The zig-zag movement is achieved by a mechanism placed inside the ball which alters the center of gravity of the ball as it rolls.

Abstract: A zig-zag ball useful as a toy or in sports is disclosed. The ball moves in a zig-zag manner when rolled out on a flat horizontal surface. The zig-zag movement is achieved by a mechanism placed inside the ball which alters the center of gravity of the ball as it rolls. One embodiment of the invention comprises a ball containing an internal shaft with engraved left and right threads, a hollow cylinder slideably mounted on the shaft, a weight attached to the cylinder and a pin on the cylinder contacting and following the threads on the shaft as the ball rolls and the cylinder turns on the shaft.