| 摘要 |
The invention is for a type of roller skate, which is named ball roller skate. A ball roller skate gives the skater freedom to move and make movements in any freely chosen direction. A ball roller skate according to the invention contacts the ground by means of a spherical ball which is free to rotate in any direction. There can also be other balls having various functions both to carry the bigger so called skating ball and to make possible braking and various movements. Braking balls can affect the bigger skating ball, either through a separating wall between the two balls or through another ball. These two means of affecting can also be combined. All of the balls are suitably mounted in a fastening body having a number of cavities, the forms of which essentially follow that of the balls of the ball roller skate.
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