Collapsible ski-bob - has support and steering skis, and frame bars, connected freely movable but captive

摘要

The ski-bob has support ski and a steering ski and has a horizontal frame bar (1) with saddle (6). The rear end of the bar is curved downward, and has an external thread, on which is screwed a sleeve (15) with internal thread. The sleeve encloses a rotary axis (11), and the top part of a vertical frame bar (12), hinged to the curved end. The lower end of this bar passes through a second sleeve (16) with internal thread. A mandrel (13) on the top of the support ski (25) is screwed into the sleeve, and hinged via a pivot axis (14) of the vertical frame bar. A two-part control rod (19,20) is connected to the steering ski (24) via a hinge (22,23). The lower part is held turnably in a hole (27) in a connection element (26) on the support ski. The top part is non-turnably held by a part (8,9), hinged to the top end of the horizontal bar.