Patent Number: 6,168,390

Title: Dosing pump for dosed liquid conveyance

Abstract: A dosing pump for dosed liquid conveyance that includes a suction valve built into a suction tube coming out of a suction container, a pump chamber having a displacement volume that can be modified by means of a pumping member, a pressure valve leading to a dosing tube, a deaeration device arranged on the top end of the tube and comprising a return valve and a flow-actuated deaeration and bypass valve built into a deaeration valve having response characteristics dependent upon the state of aggregation of the liquid contained therein. The flow-activated deaeration and bypass valve is open when idle, only closing when pressure is raised in the presence of liquid in the valve, and is provided with a membrane. Faulty pump operation is substantially reduced when the membrane is connected to a remote closing member which closes the deaeration tube when the membrane is moved. A return valve is arranged between the membrane and the closing member.

Inventors: Hunklinger; Herbert (Ruhrpolding, DE), Rutz; Klaus (Vachendorf, DE)

Assignee: Henkel Kommanditgesellschaft Auf Aktien

International Classification: F04B 53/00 (20060101); F04B 53/06 (20060101); F04B 049/00 ()

Expiration Date: 01/02/2018