Fastener means including an interior fluid-pressure expandable locking portion

Claim 1

A FASTENER MEANS INCLUDING AN INTERIOR FLUID-PRESSURE EXPANDABLE LOCKING PORTION, COMPRISING A LONGITUDINAL FASTENER ELEMENT HAVING FIRST AND SECOND RETAINING END PORTIONS AND AN INTERMEDIATE SHANK PORTION THEREBETWEEN ADAPTED TO BE POSITIONED IN A THROUGH-APERTURE IN STRUCTURAL MEMBER MEANS TO WHICHT THE FASTENER ELEMENT IS ADAPTED TO BE FASTENED, SAID FIRST RETAINING END PORTION COMPRISING A RADIAL FLANGE AT ONE END OF SAID SHANK, WITH SAID FIRST RETAINING END PORTION BEING ADAPTED TO BE POSITIONED ON ONE SIDE OF SAID STRUCTURAL MEMBER MEANS AND WITH SAID SECOND RETAINING END PORTION BEING ADAPTED TO BE POSITIONED ON THE OTHER SIDE OF SAID STRUCTURAL MEMBER MEANS, A SECOND RADIAL FLANGE AT THE OTHER END OF SAID SHANK, SAID SECOND RETAINING END PORTION BEING POSITIONED ON SAID SHANK INTERMEDIATE SAID FLANGES AND COMPRISING AN INTERIOR FLUID-PRESSURE EXPANDABLE EFFECTIVE RETAINING MEANS, SAID FASTENER ELEMENT BEING PROVIDED WITH INLET-OUTLET VALVE MEANS IN INTERIOR COMMUNICATION WITH SAID INTERIOR FLUIDPRESSURE EXPANDABLE RETAINING MEANS FOR THE FORCIBLE RECEPTION OF A QUANTITY OF PRESSURIZED FLUID INTO WHEREBY TO PROVIDE SAID PRESSURIZED FLUID MEANS WITHIN SAID INTERIOR FLUID-PRESSURE EXPANDABLE RETAINING MEANS FOR FORCIBLY EXPANDING SAME, SAID INLET-OUTLET VALVE MEANS BEING NORMALLY CLOSED WHEN SAID INTERIOR FLUID-PRESSURE EXPANDABLE EFFECTIVE RETAINING MEANS IS EXPANDED, SAID FLUID-PRESSURE EXPANDABLE EFFECTIVE RETAINING MEANS BEING FORMED OF A PLURALITY OF CONNECTED COAXIAL TOROIDAL EXPANDABLE SEGMENTS HAVING THEIR INTERIORS IN FLUID COMMUNICATION WITH EACH OTHER AND POSITIONED ON SAID SHANK, SAID SEGMENTS BEING REMOVABLE WHEN IN NON-EXPANDED POSITION, SAID SEGMENTS WHEN IN THE EXPANDED RETAINED CONDITION ENGAGING BETWEEN SAID STRUCTURAL MEMBER MEANS AND SAID SECOND FLANGE.