Corrosion-resistant, headed fastener, such as nail for exterior applications, and manufacturing method
US5564876A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 1995 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Feb 15, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/902
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A corrosion-resistant, headed fastener, such as a nail for exterior applications, is made from a carbon steel wire pre-coated with a protective, metallic layer having corrosion-resistant properties, the protective, metallic layer being discontinuous at a region on a leading end of the pre-coated wire. After at least part of a protective, metallic cap having corrosion-resistant properties is disposed near the leading end of the pre-coated wire, at least part of the protective, metallic cap is welded to the leading end of the pre-coated wire, so as to cover the region where the protective, metallic layer is discontinuous, by impact welding, as the fastener is formed from the precoated wire in such a manner that the fastener is formed with a shank and with a head, which is formed by deformation of the leading end of the pre-coated wire. The welded part of the protective, metallic cap provides the fastener with corrosion resistance at the region where the protective, metallic layer is discontinuous, and the protective, metallic layer provides the remaining portions of the fastener with corrosion resistance. The protective, metallic layer is made from chromium, nickel, zinc, aluminum, o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.