Inflatable and collapsible pylon

Claim 1

A collapsible pylon comprising an inflatable body portion having an upstanding conical wall and an integral bottom wall defining a complete enclosure, an inflating opening in said body portion, means for closing said opening to maintain said pylon inflated, and a weighted base secured to the under surface of said bottom wall, said base comprising a rigid plate, said body portion also comprising an enclosed compartment below said bottom wall, said base being positioned within said compartment, said base being at least as large as said bottom wall, and having corner portions which protrude outwardly beyond said bottom wall, said body portion further having an outwardly extending inflatable bumper, said bumper extending from all sides of said body portion to a point outwardly of said base when said pylon is fully inflated and being located adjacent to but spaced above the bottom of said pylon, whereby when said pylon tips, said bumper engages the surface on which said pylon is supported to temporarily stop further tipping, the concentration of weight in the pylon in said tipped position being such as to impart a selfrighting moment to the pylon about said bumper as a fulcrum.