Method of chemically coating fasteners having improved penetration and withdrawal resistance
US6436474B2 · kind B2 · utility
15Cited by
51References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2001 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jun 21, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B33/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A polymer-coated metal fastener is provided which has both improved ease of drive into a substrate, and improved resistance to withdrawal from the substrate. The coated fastener is prepared by heating a metal fastener, or a portion of it, to about 400-2000° F. and cooling in an aqueous medium containing an acrylic or modified acrylic polymer. The rapid cooling causes formation of a thin yet durable polymer coating on the fastener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.