B - Operations – Transporting – 61 – B
Patent
B - Operations, Transporting
61
B
198/12.05
B61B 11/00 (2006.01)
Patent
CA 1217443
A B S T R A C T A ski tow comprises a guide pipe guiding a string transmitting a towing force to towing means attached to the string at suitable intervals. Instead of being a tension element like a wire, a rope or the like, which is conventional in known ski tows, the string consists of separate pressure elements, each having at either end an end face contacting the opposed end face of an adjacent element, whereby the towing force is transmitted by pushing the string, which is accordingly subjected to a compression force. The size and shape of the end faces are such that at any possible angular position of two adjacent pressure elements due to tolerances between the guide pipe and the elements and /or to curves in the load towing section of the guide pipe, the point of contact between the contacting end faces lies to the side of a notional straight line extending through the centres of said two adjacent elements opposite from the point of intersection between the longitudinal notional axes of said two adjacent elements. Thereby, the string of pressure elements when subjected to a compressive force due to advancing the string by pushing, will tend to form a stable, straight column, which column is still free to fold when required by curves in the guide pipe.
463849
Krogsrud Harald
Ogilvy Renault
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