Liquid dosing apparatus

US4256440A · kind A · utility

Assignee

• Lang Apparatebau GmbH · DE

Inventors

• Johann H. Kern · Vachendorf, DE
• Walter Eichner · Siegsdorf, DE

Key dates

• Filing date: Jul 9, 1979
• Grant date: Mar 17, 1981
• Expiry date: Jul 9, 1999

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B13/02
• WIPO field: Control
• WIPO sector: Instruments

Abstract

This invention is directed to an apparatus for dosing a solution into a liquid conduit by means of a piston dosing pump mechanically driven by the liquid pressure, which comprises a dosing pump having a chamber containing liquid from the conduit and into which the solution is delivered from a supply source, a spring-biased nonreturn valve between the dosing pump chamber and the liquid conduit, and a second pump which supplies fresh liquid to the dosing pump chamber, the piston of the second pump being synchronized with the piston of the dosing pump.