Patent · US Expired

Process for manufacturing a sliding contact piece for medium to high current densities

US7449144B2 · kind B2 · utility

0Cited by

10References

6Claims

0Family size

Assignee

Deutsche Carbone AG · DE

Inventors

Wilhelm Latz · Frankfurt, DE
Jurgen Spangenberg · Bad Vilbel, DE
Arwed Uecker · Farmville, US

Key dates

Filing date	Jan 17, 2003
Grant date	Nov 11, 2008
Priority date	—
Expiry date	Dec 1, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12146
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A process for manufacturing a sliding contact piece for medium to high current densities including a step of warm premixing of graphite and plastic binder, a step of cold mixing of the resulting premixture with copper, a step of pressing of the resulting main mixture into the sliding contact piece, and finally a step of sintering of it; and so as to improve the operating characteristics of the sliding contact piece, which is free of any environmentally harmful additives, a metal such as zinc, tin, bismuth or an alloy of such metals is added during the premixing of the graphite and plastic binder.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.