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Dosing device for the volumetric dosing of a liquid additive

  • US 5,512,046 A
  • Filed: 11/17/1994
  • Issued: 04/30/1996
  • Est. Priority Date: 11/23/1993
  • Status: Expired due to Term
First Claim
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1. A dosing device for volumetric dosing of a liquid additive which is added in a certain volume ratio to a fluid flowing in two hose lines comprising a first hose line and a second hose line which feeds directly or indirectly into the first hose line, said dosing device comprising two electrically triggerable valve means which are each inserted into one of two hose lines and coupled so that only one of the two valve means is switched in a switching cycle to an open position;

  • a counting and control unit (CPU, RAM);

    a drip tube which extends downstream from a junction;

    a drip chamber connecting downstream from the drip tube; and

    a light barrier, the direction of action of which is arranged transversely to a fall path of drops of additive, whereby drops falling in the drip chamber are counted and the valve means is alternately triggered by the counting and control unit after a certain number of drops have been counted.

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