The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 1989
Filed:
Nov. 09, 1987
Imre Brecz, Rancho Santa Margarita, CA (US);
Dennis Schultz, Fullerton, CA (US);
Dennis L Hinton, Yorba Linda, CA (US);
Microdot Inc., Darien, CT (US);
Abstract
A composite blind rivet wherein a ductile metallic sheath fully covers the blind head forming portion of the rivet before and after deformation thereof so as to preclude protrustion of said fibers upon formation of said blind head. The sheath is initially expanded radially along a thin-walled portion thereof during blind head formation by the hydrostatic pressure generated by axial compression of the rivet's composite core, whereafter axial compression of the sheath supplants the hydrostatic core pressure to radially outwardly buckle the sheath into a blind head preferably of frusto-conical cross-section. Subsequent to blind head formation, the sheath elastically maintains a radially inward bias on the rivet's composite core while elastically axially biasing the anvil from the workpieces, whereby clamp-up force is maintained notwithstanding nominal plastic cold flow of the rivet's composite core during use.