ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,036, issued on May 26, was assigned to J. VAN WALRAVEN HOLDING B.V. (Mijdrecht, Netherlands).
"Fastening assembly" was invented by Frank Nijdam (Harderwijk, Netherlands) and Marek Juzak (Mijdrecht, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A blind fastening assembly includes a bolt having a bolt shank and a bolt head, a metal expansion sleeve fitted in use over at least a part of the bolt shank and having deformable wall segments, a washer arranged over the bolt shank, a wedge member arranged between the washer and the expansion sleeve and having a wedge portion adapted to be inserted in one end of the expansion sleeve, and a nut arr...