Stock material or miscellaneous articles – Patched hole or depression
Patent
1984-10-29
1986-05-13
Kittle, John E.
Stock material or miscellaneous articles
Patched hole or depression
52514, 156 94, B32B 310, E04G 2302
Patent
active
045886261
ABSTRACT:
A repair patch kit for repairing holes in panels of composite materials includes a bolt having a rigid washer of about the same diameter as the hole to be repaired. The rigid washer bears against a slit disc that is substantially larger than the hole. The slit disc can be twisted to open the slit, and the slit can be inserted over the edge of the hole. The disc can then be "threaded" or rotated through the hole by merely revolving the bolt around the hold periphery. On the blind-side of the panel, the disc slit closes and a full disc form is presented to the blind-side of the panel. A set of resin-impregnated fabric plies is pushed through the hole behind the slit disc on the bolt and is pressed against the marginal regions of the hold on the blind-side of the panel by the slit disc. The hole is packed full of resin-impregnated fill material or a plug cut from a similar panel, and a set of resin-impregnated repair plies is pressed over the fill material and against the near side of the panel around the marginal regions of the hole by a back-up plate on the bolt. The entire assembly is squeezed tight against the panel by a nut on the bolt and held in place while the resin cures, after which the nut and plate are removed and the bolt is cut off flush with the near side panel surface.
REFERENCES:
patent: 2598194 (1952-05-01), Shippey
patent: 2997416 (1961-08-01), Helton
patent: 3295285 (1967-01-01), Metz
patent: 3325955 (1967-06-01), Haut
patent: 4100712 (1978-07-01), Hyman
patent: 4285183 (1981-08-01), Condit
patent: 4370842 (1983-02-01), Martin et al.
patent: 4406107 (1983-09-01), Schoonbeck
Cologna Rudy L.
Eng Melvin D.
King Edgar P.
Kittle John E.
Neary J. Michael
Saitta Thomas C.
The Boeing Company
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