Patent · US Expired

Rotary valve

US6045009A · kind A · utility

3Cited by

4References

5Claims

0Family size

Assignee

Waeschle GmbH · DE

Inventors

Walter Beirle · Ravensburg, DE
Ewald Konig · Pfullendorf, DE
Kurt Pfeifer · Neuffen, DE

Key dates

Filing date	Jan 20, 1999
Grant date	Apr 4, 2000
Priority date	—
Expiry date	Jan 20, 2019

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB65G53/4633
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

The present invention relates to a rotary valve for conveying and metering bulk material into a pneumatic conveying conduit. Exemplary embodiments include a housing with a supply opening, a discharge opening and a cellular wheel supported rotatably about a substantially horizontal axis within a cavity of the housing. The cellular wheel rotates in a predetermined direction of rotation so that as some of its cells move upward, other cells move downward. The housing has at least one venting opening for venting the upward moving cells, the venting opening being arranged before the supply opening when seen in the direction of rotation. A perimeter of the at least one venting opening lies on a peripheral wall of the housing and has a plurality of recesses which extend in a direction towards the cellular wheel when the latter rotates in the direction of rotation.

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