System for reinforcing a sandwich panel

Details System for reinforcing a sandwich panel System for reinforcing a sandwich panel

1997-10-29

1999-11-09

Hughes, S. Thomas

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Including sleeve and distinct tapered expander

2989732, 403282, 403277, 403281, 411 601, 411 602, 411546, 411 44, F16B 1306

Patent

active

059801743

ABSTRACT:
A system for reinforcing a sandwich panel, the panel having a first exterior skin, an intermediate skin and a second exterior skin, the skins being separated by first and second cores and having a hole bored therethrough of diameter A, the holes in the first and second exterior skins being enlarged to a diameter B, the system including a first tubular sleeve that is insertable into the hole in the first exterior skin and being of a length substantially equal to the spacing between the first exterior skin and the intermediate skin, a second tubular sleeve that is insertable into the hole in the second exterior skin and being a length substantially equal to the spacing between the second exterior skin and the intermediate skin, the first and second sleeves each having a diameter greater than A and slightly less than B, a bolt insertable through the tubular sleeves, the bolt having a head that contacts the exterior surface of the first exterior skin, first and second flare washers positioned on the bolt, one engaging the first tubular sleeve and the other engaging the second tubular sleeve and a nut threadably receivable on the bolt adaptable to contact the exterior surface of the second exterior skin.

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