Production of metal-plated areas on selected interior portions of deep-drawn tubular parts
US4612703A · kind A · utility
7Cited by
7References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1985 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Mar 18, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49224
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for producing a small-diameter metal tube having a coating of a different metal on selected portions of its inner surface, the tube being used for the body of a plunger-type electrical contact. A flat piece of metal from which the tube is to be made is coated with a predetermined pattern of a second metal on at least one preselected portion of its surface, then the flat piece is subjected to deep drawing operations to produce a tube coated with a predetermined pattern of the second metal on preselected portions of its interior surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.