Blind press nut devices

Claim 1

A FASTENER BOLT RECEIVING DEVICE FOR INSTALLATION IN A SUBSTRUCTURAL MEMBER ADAPTED TO HAVE SECURED THEREOVER A SECOND STRUCTURAL MEMBER AND, COMPRISING A HEAD PORTION ADAPTED, WHEN INSTALLED, TO LIE FLUSH WITH THE UPPER SURFACE OF SAID SUBSTRUCTURAL MEMBER, MEANS INTEGRAL WITH SAID HEAD PORTION FOR LOCKING SAID DEVICE AGAINST ROTATION WITHIN SAID SUBSTRUCTURAL MEMBER, AN INTERNALLY THREADED SHANK PORTION, AND AN EXPANSIBLE BELLOWS PORTION INTERMEDIATE SAID HEAD AND SHANK PORTION, SAID HEAD, SHANK AND BELLOWS PORTIONS PRESENTING AN INTEGRAL CONSTANT DIAMETER CYLINDRICAL EXTERIOR SURFACE, AND DEVICE HAVING AN AXIAL APERTURE THEREIN WITH THE DIAMETER OF THE INNER SURFACE OF SAID HEAD PORTION AND SAID SHANK PORTION THREAD MAJOR DIAMETER BEING SUBSTANTIALLY EQUAL, WITH SAID BELLOW HAVING AN INNER CYLINDRICAL SURFACE OF GREATER DIAMETER THAN SAID HEAD PORTION AND SAID SHANK PORTION, AN UPPER BEVEL EXTENDING UPWARDLY AND INWARDLY FROM SAID BELLOWS INNER CYLINDRICAL SURFACE UPPER MARGIN AND MERGING WITH THE INNER SURFACE OF SAID HEAD PORTION TO ESTABLISH A FIRST FORCE PLANE, AND A LOWER BEVEL EXTENDING DOWNWARDLY AND INWARDLY FROM SAID BELLOWS CYLINDERICAL SURFACE LOWER MARGIN AND MERGING WITH THE INNER DURFACE OF SAID SHANK PORTION TO ESTABLISH A SECOND FORCE PLAN.