Patent ID: 9637138
Date: 2017-05-02
CPC Classifications: A63C,B61B

Claim:
1. A towing system for towing a user on a support material, the towing system comprising: a plurality of towers standing upwardly from a plurality of support surfaces, the plurality of towers being arranged relative to a skiing surface defined by the support material and each one of the plurality of towers having a base portion arranged for resting on a respective one of the plurality of support surfaces and an upper portion that is arranged to be elevated relative to the skiing surface; a pulley structure coupled to the upper portion of said each one of the towers, the pulley structure comprising: a motor on at least one of the plurality of towers that is operable to effect the rotational motion of the pulley over said at least one of the plurality of towers; a cable passing along the pulleys of the plurality of towers so as to form a closed loop therebetween, the cable being arranged to span substantially over the skiing surface; a towing element coupled to the cable and arranged to extend away therefrom over the skiing surface for towing the user along the skiing surface; wherein the rotational motion of the pulley is in a radial plane with respect to the shaft; wherein the pulley structure of at least one of the plurality of towers is pivotal relative to the tower about an axis transverse to the shaft so as to pivot the shaft about said axis for adjusting said radial plane relative to the radial planes of the pulleys of remaining ones of the plurality of towers such that the radial planes of the pulleys are substantially coplanar; said axis transverse to the shaft being located in fixed relation to the tower such that the pulley of said pulley structure of at least one of the plurality of towers remains in a fixed location with respect thereto during pivotal adjustment of the pulley structure.