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AssigneeLisi Aerospace
InventorsAlexandre Berthou, Martial Broucke
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The object of the invention is a cap to lubricate an inner wall of a perforation going through at least two elements of the structure. The cap comprises a tubular body and at least one lubricant reserve, and before installation in the structure said cap has a largest external diameter larger than an internal diameter (DS) of the perforation, and the cap lubricates the internal surface of the perforation when its largest external diameter is radially compressed by a wall of the perforation. The invention also concerns a fastener comprising this type of cap, and an interference assembly process for the fastener equipped with the cap. The invention is applicable to the assembly of aircraft structures.
A cap to lubricate an internal wall of a perforation or a sleeve with internal diameter (DS) passing through at least two structural elements characterized by the fact that the cap comprises a tubular body and at least one lubricant reserve, before insertion in the perforation or in the sleeve, the cap has a largest external diameter larger than the smallest internal diameter (DS) of said perforation or sleeve, and by the fact that the lubricant of said cap is distributed over an internal surface of the perforation or the sleeve when said cap is inserted into the perforation or the sleeve and is radially compressed by the internal wall of said perforation or sleeve.
Dependencies are inferred from the claim text.