Resilient weather seal for a floating roof

Claim 1

A SEAL FOR USE IN A LIQUID STORAGE TANK HAVING A TANK SHELL AND A FLOATING ROOF PROVIDED WITH A SUBSTANTIALLY HORIZONTAL PERIPHERAL SUPPORTING SHELF TERMINATING IN A PERIPHERAL EDGE RADIALLY SPACED INWARDLY FROM SAID TANK SHELL, SAID SEAL EXTENDING CONTINUOUSLY AROUND THE PERIPHERY OF SAID ROOF AND CLOSING THE SPACE BETWEEN SAID ROOF EDGE AND THE TANK SHELL, SAID SEAL BEING RADIALLY ELONGATED AND COMPRISING: A RADIALLY ELONGATED, WEATHER RESISTANT, FLEXIBLE, FABRIC ENVELOPE EXTENDING RADIALLY OUTWARDLY FROM SAID ROOF TOWARD SAID SHELL; A RESILIENT, COMPRESSIBLE, SOLID, MATERIAL EXTENDING INTEGRALLY WITHIN SAID ENVELOPE AND FILLING THE ENVELOPE CONTINUOUSLY SUBSTANTIALLY FROM THE RADIALLY INNERMOST TO RADIALLY OUTERMOST PORTIONS THEREOF; AND SUBSTANTIALLY CONTINUOUS PERIPHERAL MEANS, LOCATED ABOVE AND OFFSET, SUBSTANTIALLY, RADIALLY INWARDLY OF THE PERIPHERAL EDGE OF SAID SUPPORTING SHELF, FOR CLAMPING TO SAID SHELF THE FILLED RADIALLY INNERMOST PORTION OF SAID ENVELOPE AND THAT PORTION OF THE RESILIENT MATERIAL FILLING THE ENVELOPE''S RADIALLY INNERMOST PORTION; THE GREATER PART OF SAID FILLED ENVELOPE AND OF SAID RESILIENT MATERIAL THEREIN BEING UNCLAMPED AND EXTENDING RADIALLY OUTWARDLY BEYOND THE SHELF''S PERIPHERAL EDGE; SAID FILLED ENVELOPE HAVING A SUBSTANTIALLY UNIFORM THICKNESS IN AN UNCLAMPED STATE; SAID CLAMPED PORTION OF THE RESILIENT MATERIAL BEING UNDER COMPRESSION AND THE UPPER PORTION OF SAID ENVELOPE BEING UNDER TENSION TO MAINTAIN THE SEAL IN AN UPTHRUST POSITION EXTENDING ANGULARLY UPWARDLY FROM THE ROOF TO THE TANK SHELL WHEN THE SEAL IS IN ITS NORMAL CONDITION OF REPOSE.