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1. (WO2018044848) FASTENER FOR THIN-SHEET MATERIALS

Pub. No.:    WO/2018/044848    International Application No.:    PCT/US2017/049038
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Wed Aug 30 01:59:59 CEST 2017
IPC: F16B 37/06
Applicants: PENN ENGINEERING & MANUFACTURING CORP.
Inventors: MALONEY, Michael, J.
Title: FASTENER FOR THIN-SHEET MATERIALS
Abstract:
A cylindrical, internally -threaded part such as a nut or standoff that can be clinched into very -thin, sheet-metal panel even if the receiving hole is blind. The part has no integrally -formed displacer. The part is installed in an annular, blind hole by cold deforming and pushing material of the panel with a special installation tool into one or more recesses of the part. The tool has an annular cavity for receiving the fastener, an annular displacer surrounding the outer diameter of the annular cavity, and a center punch surrounded by the inner diameter of the cavity. One recess of the part may comprise an undercut in the outer periphery while another recess may comprise the groove of the internal threads. With a single stroke of the tool, panel material is simultaneously pushed into the undercut by the displacer and into the threads by the center punch to attach the part to the panel by clinching.