Patent · US Expired

Method and apparatus for the pneumatic conveying of bulk material

US4067622A · kind A · utility

12Cited by

2References

6Claims

0Family size

Assignee

Waeschle Maschinenfabrik GmbH · DE

Inventors

Wolfgang Krambrock · Weingarten, DE
Dieter Heep · Bad Waldsee, DE
Norbert Eberhard · Ertingen, DE

Key dates

Filing date	Nov 5, 1976
Grant date	Jan 10, 1978
Priority date	—
Expiry date	Nov 5, 1996

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB65G53/521
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

Conveyor gas is passed through a conveyor conduit to convey bulk material therethrough, while clean gas is passed through a by-pass conduit connected to the conveyor conduit at positions spaced along the length of the conduits. The by-pass conduit can be divided into a plurality of sections by shut-off valves which close in response to a predetermined pressure difference between the two conduits, with a reduced pressure in the conveyor conduit due to a blockage of material therein. Due to the pressure difference, clean gas is transferred from the by-pass to the conveyor conduit at a plurality of said connections between the two conduits, only in the respective section in which there is the pressure difference.

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