Patent ID: 8511952

Claim:
A blind clamp comprising: a core bolt comprising a first threaded portion on a first end and a wrenching feature adjacent a second end; an expanding nut comprising a second threaded portion in threaded engagement with said first threaded portion and a bulbing region, wherein said bulbing region bulbs to substantially increase its diameter upon application of a first compressive load; a spacer positioned proximate to said second end, wherein said spacer is constrained from longitudinally moving past said wrenching feature, and wherein said spacer defines a bore; a shank positioned between said expanding nut and said spacer, wherein said shank is constructed and arranged to translate longitudinally through said bore; a protuberance on said shank that extends into said bore; and a flange that blocks said shank from longitudinally advancing with respect to said spacer until a second compressive load is exerted, wherein said second compressive load is greater than said first compressive load.