Snap-in roller skates each has four instead of 2 forks with rollers on base plate, with round, square-headed bolts

摘要

Instead of having 2 axles, the roller skate has 4 axles with forks in a row each with opposite facing unit. The forks can be rotated laterally by 90 degrees after operating the round square-headed bolts which are movable in the direction of travel. The forks are aligned by springs in the direction of travel after the lock has been released. All the forks with rollers are centrally operated.