Patent · US Expired

Method for densification of powdery silica and article formed thereby

US4680043A · kind A · utility

5Cited by

4References

4Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Herbert Ginter · Kaufbeuren, DE
Reinhard Klingel · Alzenau, DE
Reinhard Manner · Maintal, DE

Key dates

Filing date	Jul 22, 1985
Grant date	Jul 14, 1987
Priority date	—
Expiry date	Jul 22, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2982
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A powdery substance, such as for example pyrogenically prepared silicon dioxide, is subjected to predensification through the utilization of centrifugal force in a centrifuge. Subsequently, the centrifuge receptacles are closed with a free flying piston. Through utilization of the centrifugal force, there is achieved through the use of the free flying piston an additional pressure which is exerted on the predetermined powdery substance.

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