Lightning protection fastener and mounting method thereof
First Claim
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1. A lightning protection fastener comprising:
- a fastener member for fastening a second member to a first member which constitutes an airframe of an aircraft and the fastener member having a shaft which penetrates the first member and the second member and protrudes on a side of at least one of the first member and the second member;
a fastening member mounted on the fastener member shaft which protrudes on the side of at least one of the first member and the second member;
a cap made of an insulating material and the cap being mounted so as to cover the fastener member shaft and the fastening member; and
a sealant made of an insulating material and filled into the cap to fill any space between the cap and the fastener member and the fastening member,wherein the cap includes an opening adapted to house the fastener member shaft and the fastening member as well as a through-hole formed in a wall surface of the cap, andinside diameter D1 of the cap on the side of an end portion of the opening which faces the first member or the second member and hole diameter D2 of the through-hole are configured to satisfy 0.10≦
D2/D1≦
0.27,wherein after installation of the cap, the sealant completely fills the space between the cap and the fastener member and the fastening member, and part of the sealant spills out of the cap through the through-hole.
1 Assignment
0 Petitions
Accused Products
Abstract
A sealant 34 filled into a cap 30A is caused to overflow through both an opening in a first end portion 30a of the cap 30A and a through-hole 40 of the cap 30A when the cap 30A is pressed against a fastener member 25. With regard to the cap 30A, a ratio between inside diameter D1 of the opening on the side of the first end portion 30a and hole diameter D2 of the through-hole 40 in the second end portion 30b is set as follows: 0.10≦D2/D1≦0.27.
35 Citations
14 Claims
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1. A lightning protection fastener comprising:
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a fastener member for fastening a second member to a first member which constitutes an airframe of an aircraft and the fastener member having a shaft which penetrates the first member and the second member and protrudes on a side of at least one of the first member and the second member; a fastening member mounted on the fastener member shaft which protrudes on the side of at least one of the first member and the second member; a cap made of an insulating material and the cap being mounted so as to cover the fastener member shaft and the fastening member; and a sealant made of an insulating material and filled into the cap to fill any space between the cap and the fastener member and the fastening member, wherein the cap includes an opening adapted to house the fastener member shaft and the fastening member as well as a through-hole formed in a wall surface of the cap, and inside diameter D1 of the cap on the side of an end portion of the opening which faces the first member or the second member and hole diameter D2 of the through-hole are configured to satisfy 0.10≦
D2/D1≦
0.27,wherein after installation of the cap, the sealant completely fills the space between the cap and the fastener member and the fastening member, and part of the sealant spills out of the cap through the through-hole. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A lightning protection fastener comprising:
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a fastener member for fastening a second member to a first member which constitutes an airframe of an aircraft and the fastener member having a shaft which penetrates the first member and the second member and protrudes on a side of at least one of the first member and the second member; a fastening member mounted on the fastener member shaft which protrudes on the side of at least one of the first member and the second member; a cap made of an insulating material and the cap being mounted so as to cover the fastener member shaft and the fastening member; and a sealant made of an insulating material and filled into the cap to fill any space between the cap and the fastener member and the fastening member, wherein the cap includes an opening adapted to house the fastener member shaft and the fastening member as well as a through-hole formed in a wall surface of the cap, and wherein after installation of the cap, the sealant completely fills the space between the cap and the fastener member and the fastening member, and part of the sealant spills out of the cap through the through-hole. - View Dependent Claims (10, 11)
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12. A lightning protection fastener comprising:
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a fastener member for fastening a second member to a first member which constitutes an airframe of an aircraft and the fastener member having a shaft which penetrates the first member and the second member and protrudes on a side of at least one of the first member and the second member; a fastening member mounted on the fastener member shaft which protrudes on the side of at least one of the first member and the second member; a cap made of an insulating material and the cap being mounted so as to cover the fastener member shaft and the fastening member; and a sealant made of an insulating material and filled into the cap to fill any space between the cap and the fastener member and the fastening member, wherein the cap includes an opening adapted to house the fastener member shaft and the fastening member as well as a through-hole formed in a wall surface of the cap, and wherein an openable and closable lid adapted to cover the through-hole is formed on the cap. - View Dependent Claims (13, 14)
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Specification