A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
A63C17/00—Roller skates; Skate-boards
A63C17/04—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs
A63C17/06—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs single-track type
A63C17/061—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs single-track type with relative movement of sub-parts on the chassis
A63C17/064—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs single-track type with relative movement of sub-parts on the chassis comprising steered wheels, i.e. wheels supported on a vertical axis