Fastener using lubricated interference fit
US10544815B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2015 |
| Grant date | Jan 28, 2020 |
| Priority date | — |
| Expiry date | Jan 29, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B2200/93
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a metallic fastener (10; 40) for the interference fit assembly of at least two structural elements (20, 22) comprising a through hole, the fastener comprising an enlarged head (12; 42), a shaft (14; 44) having an external diameter before installation that is greater than an internal diameter of the hole, said shaft comprising a conductive surface (26; 56). Before installation, at least the conductive surface (26; 56) is coated with a lubricating layer (30), which comprises a mixture of at least one polyolefin and one polytetrafluoroethylene, for example, having sufficient adherence to prevent its abrasion by manual manipulation of the fastener and being weak enough to be at least partly stripped from the conductive surface during the interference fit assembly of the fastener.The invention further relates to a method for obtaining such a fastener and to a method for installing such a fastener in a structure.The invention is applicable to the assembly of aircraft structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.