Patent · US Expired

Gas injecting valve for suspensions

US4261389A · kind A · utility

10Cited by

2References

2Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Claus Hager · Julbach, DE
Rudolf Wiedholz · Burghausen, DE
Jurgen Schmidt · Los Alamos, US

Key dates

Filing date	Nov 2, 1979
Grant date	Apr 14, 1981
Priority date	—
Expiry date	Nov 2, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86799
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A valve arrangement for injecting a gas into a polyvinyl chloride fluid suspension, through an inlet port in the bottom of the suspension tank. The valve includes an overhanging upper disk with a hollow foraminated cylinder, so that the gas exits the cylinder under pressure through the foraminations, thus keeping the operating portion of the valve free of the suspension, with the valve disk overhang providing additional protection against intrusion of suspension material into the clearance space between the valve cylinder and surrounding injection tube. The valve disk overhang terminates in a pointed ridge which engages the top of the injection tube to form a seal.

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