Patent ID: 9290276
Filing Date: 2016-03-22
CPC Classification: B64D,F16B

Claim Text:
1. A lightning protection fastener for fastening an outer panel to a support member, the outer panel being made of a fiber reinforced plastic material, and the support member supporting a backside of the outer panel, comprising: a fastener body made of a metal, the fastener body including a shaft portion passing through the outer panel and the support member, and a head portion located on an outer surface side of the outer panel; and an insulating member made of an insulating plastic material and mounted to the head portion, wherein the head portion has a seat surface forming a frustoconical shape, wherein the outer panel has a receiving surface conforming to the seat surface, such that the seat surface comes into contact with the receiving surface as the fastener is tightened on the outer panel, wherein the insulating member has an insulating inclined portion forming a contact surface which is spaced apart from a plane of the seat surface, such that, when a portion of the receiving surface which opposes the seat surface is depressed by the fastener body, the contact surface comes into contact with the receiving surface, wherein the depression of the receiving surface creates a gap between the insulating inclined portion, the outer panel, and the fastener body, and the gap is filled with an insulating sealant, and wherein the contact surface comes into contact with the receiving surface with a predetermined contact pressure that makes the insulating member remain flat at an outer edge of the outer panel.