Sled with tiltable runners controlled by a tilting rider support

Claim 1

A SKI-SLED COMPRISING A PAIR OF SKIS ARRANGED IN LATERALLY SPACED APART RELATION, A PLATFROM CENTRALLY DISPOSED WITH REFERENCE TO THE PAIR OF SKIS, AND ROD MEANS INTERCONNECTING THE PLATFORM WITH SAID PAIR OF SKIS TO LOCATE THE PLATFORM ABOVE THE SKIS AND TO ROCK THE SKIS IN THE SAME DIRECTION AND CONCURRENTLY WITH THE PLATFORM RESPONSIVE TO ROCKING MOVEMENT OF THE PLATFROM, SAID ROD MEANS COMPRISING A FRONT AND BACK GROUP OF RODS WITH EACH GROUP HAVING FOUR RODS INCLUDING ONE PAIR OF INNER RODS PIVOTALLY CONNECTED AT THEIR UPPER END PORTIONS TO A SUBSTANTIALLY COMMON PIVOT ON THE PLATFORM WITH THE LOWER END PORTION OF ONE OF SAID RODS PIVOTALLY CONNECTED TO ONE SKI AND THE LOWER END PORTION OF THE OTHER OF SAID RODS PIVOTALLY CONNECTED TO THE OTHER SKI AND WITH EACH GROUP OF FOUR RODS INCLUDING ANOTHER PAIR OF OUTER RODS PIVOTALLY CONNECTED AT THEIR LOWER ENDS TO THE SKIS AND AT THEIR UPPER ENDS TO THE PLATFORM WITH THE OUTER RODS SPACED OUTWARDLY IN SUBSTANTIALLY PARALLLEL RELATION WITH THE INNER RODS WITH THE SPACING OF THE PIVOTS BETWEEN THE UPPER ENDS EQUAL TO THE SPACING OF THE PIVOTS BETWEEN THE LOWER ENDS TO DEFINE PARALLELOGRAMS BETWEEN EACH OF SAID PIVOTS OF THE OUTER AND INNER RODS AND THE SKI AND PLATFORM LOCATED THEREBETWEEN AND A CROSS-BRACE ROD BETWEEN THE PAIRS OF INNER RODS.