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:
Jun. 21, 2022
Filed:
Feb. 12, 2019
Lisi Aerospace, Paris, FR;
Alexandre Berthou, Bois-Colombes, FR;
Florent Verdier, Rueil Malmaison, FR;
Charles Pham, Sevran, FR;
LISI AEROSPACE, Paris, FR;
Abstract
A fastener for assembling at least two structural elements having an aperture, may have a fastener comprising an enlarged head () and a shank () exhibiting, prior to fitting, an outside diameter (D) greater than an inside diameter (D) of the aperture, and a locking portion comprising a screw thread or annular grooves. The fastener further comprises a lubricating sacrificial ring () on the exterior surface of the fastener, extending at least between a distal end of the shank and a proximal end of the locking portion, said ring having, before the fastener is fitted into the structure, an outside diameter greater than a diameter of the aperture. The sacrificial ring comprises a polymer resin forming a matrix encapsulating dispersant molecules and oil molecules. The fastener assembly may apply to the assembly of aircraft structures.