US 11,732,743 B2
Anchoring nut for an EME protection cap system
Bart Stevens, Summerville, SC (US); Daniel J. Cowan, North Charleston, SC (US); Sean Auffinger, Ladson, SC (US); and Brandon Mulligan, Charleston, SC (US)
Assigned to The Boeing Company, Chicago, IL (US)
Filed by THE BOEING COMPANY, Chicago, IL (US)
Filed on Feb. 19, 2021, as Appl. No. 17/179,898.
Application 17/179,898 is a division of application No. 15/960,835, filed on Apr. 24, 2018, granted, now 10,962,043.
Prior Publication US 2021/0190124 A1, Jun. 24, 2021
Int. Cl. F16B 37/14 (2006.01); F16B 33/00 (2006.01); F16B 37/12 (2006.01); B64D 45/02 (2006.01)
CPC F16B 37/14 (2013.01) [F16B 33/004 (2013.01); F16B 37/125 (2013.01); B64D 45/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cap system for enclosing a metallic fastener assembly extending through a structure, comprising:
a first securement mechanism positioned about a periphery of a nut member of the metallic fastener assembly, wherein the first securement mechanism comprises a plurality of continuous grooves which extend about the periphery of the nut member;
a cap member comprising:
a sidewall having an inner surface which defines a cavity having a stepped inner wall dimensioned to receive the nut member and defines a second securement mechanism complementary configured to engage the first securement mechanism positioned about the periphery of the nut member; and
an end of the sidewall of the cap member defines an opening to receive the nut member and provides the nut member access into the cavity, wherein the stepped inner wall of the cavity includes a first wall portion having a first diameter and a second wall portion having a second diameter less than the first diameter of the first wall portion, and the periphery along the continuous grooves defines a first diameter that is complementary to the first wall portion, and the periphery spaced from the continuous grooves defines a second diameter that is complementary to the second wall portion.