Patent · US Expired

Spiral air sifter having air regulation

US4792393A · kind A · utility

8Cited by

7References

11Claims

0Family size

Assignee

Krupp Polysius AG · DE

Inventors

Gotthardt Blasczyk · Beckum, DE
Hubert Eickholt · Beckum, DE
Otto Heinemann
Norbert Bredenholler · Oelde, DE
Ludger Kimmeyer · Beckum, DE
Peter Tiggesbaumker · Oelde, DE
Michael von Seebach · Ennigerloh, DE
Heinrich Henne · Ennigerloh, DE

Key dates

Filing date	Jun 19, 1987
Grant date	Dec 20, 1988
Priority date	—
Expiry date	Jun 19, 2007

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB07B11/04
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a sifter in which the spiral for delivery of the air for sifting is divided into a plurality of channels lying one above another in which elements for setting the quantity of sifting air delivered to the individual channels are provided. In such a sifter the quantity of sifting air in the individual regions of the sifting chamber can be optimally adapted to the requirements, which leads to a substantial improvement in the degree of separation.

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