Line suspended vehicle

Claim 1

IN A LINE-SUPPORTED VEHICLE HAVING A CENTRAL SECTION FORMED BY A CAN, AN END SECTION SHELL OF STIFF MATERIAL HAVING A CLOSED END, AN OPEN END ADAPTED TO RECEIVE THEREIN AN END OF SUCH CAN AND HAVING A STOP SHOULDER ENGAGEABLE BY SUCH CAN END TO LIMIT ITS MOVEMENT INTO THE SHELL''S OPEN END AND DEEP NOTCH MEANS OPENING AT SAID SHELL''S OPEN END, EXTENDING FROM SAID SHELL''S OPEN END TOWARD SAID SHELL''S CLOSED END TO A LOCATION BEYOND SAID STOP SHOULDER AND THE OPEN END PORTION OF SAID DEEP NOTCH MEANS BEING EXPANDABLE TO INCREASE THE EFFECTIVE CIRCUMFERENTIAL GIRTH OF THE SHELL''S OPEN END, A PILLAR OF CHANNEL-SHAPED CROSS SECTION PROJECTING OUTWARD FROM SAID SHELL AND INCLUDING TWO SUBSTANTIALLY PARALLEL FLANGES HAVING EDGES ADJACENT TO SAID SHELL JOINED, RESPECTIVELY, TO THE OPPOSITE EDGE PORTIONS OF SAID NOTCH MEANS AND A WEB OUTWARD OF SAID SHELL JOINING CORRESPONDING EDGES OF SAID FLANGES AT THE SIDE OF SAID PILLAR TOWARD THE CLOSED END OF SAID SHELL AND