Dual protection inner seal washer for electromagnetic effects (EME) fasteners

• Main Authors: WHITLOCK, Richard P, DESSALEGN, Haftom Y, CORONADO, Peter A, DREXLER, Julie M, MORDEN, Sean D
• Format: Patent
• Language: English
• Published: 23.11.2023
• Subjects: BLASTING; CYLINDERS; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PISTONS; SEALINGS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

EDITORIAL NOTE APPLICATION NUMBER - 2018204823 Please note: Abstract page 15 should be numbered 17. DUAL PROTECTION INNER SEAL WASHER FOR ELECTROMAGNETIC EFFECTS (EME) FASTENERS A dual protection inner seal washer employs a radially outward metallic portion (12) having a dielectric coating and a radially inward polymeric portion (18) engaging the metallic portion at an interface with an interference fit. The polymeric portion has at least one tapering compression surface (24, 30) to engage a surface of a structure proximate a hole and further has a fastener element contact surface (26, 56) to engage a mating surface on a fastener system element. Torqueing of the fastener element compresses the at least one compression surface inducing a predetermined pressure in the polymeric portion in a joint created by the fastener element and structure.