Patent ID: 8414990

Claim:
A frustoconical hollow body ( 1 ), comprising: an anchorable end ( 2 ) of the hollow body ( 1 ), a free end ( 3 ) of the hollow body ( 1 ), said hollow body ( 1 ) being composed of a plurality of flexible material webs ( 4 to 12 ), said material webs ( 4 to 12 ) being formed of strips arranged sequentially along an axial direction of the hollow body ( 1 ) from the anchorable end ( 2 ) to the free end ( 3 ), each of said material webs ( 4 to 12 ) extending in a peripheral direction of the hollow body ( 1 ), and bracing means that are guyed to a flexible material web in a region of said anchorable end ( 2 ) of the hollow body ( 1 ), and that anchor said anchorable end ( 2 ) to a base support ( 30 ), the bracing means being guyed to said region of said anchorable end ( 2 ) with the free end ( 3 ) being free of bracing means; wherein a region of the free end ( 3 ) of said hollow body ( 1 ) is stabilized exclusively by a continuous feed of air that maintains a positive air pressure inside said hollow body ( 1 ), and at least one of said material webs that is positioned in the region of the anchorable end ( 2 ) is formed of a first fabric that has a greater value in units of mass per unit of surface area than a value in units of mass per unit of surface area of a second fabric that forms at least one of said material webs that is positioned in the region of the free end ( 3 ), and said first fabric has a greater tearing strength than a tearing strength of said second fabric.