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Method for introducing additives

  • US 6,866,171 B2
  • Filed: 01/04/2001
  • Issued: 03/15/2005
  • Est. Priority Date: 01/10/2000
  • Status: Expired due to Fees
First Claim
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1. A system for introducing an additive into a viscous medium comprising:

  • a conduit having an inlet and an outlet;

    means for introducing a viscous medium into said conduit inlet;

    an injector having a nozzle with an axially extending bore therein, said nozzle having a nozzle passage with a nozzle outlet in fluid communication with said conduit and an inlet in fluid communication with said bore, a needle extending axially within said bore and having valve means associated therewith for controlling fluid communication of said bore with said inlet of said nozzle passage as a function of the axial position of said needle in said bore;

    a pressure regulator for controlling the pressure of an additive in said bore and the viscous medium in said conduit;

    actuating means for axially moving said needle in said bore in response to an electrical signal in a cyclical manner from a first position whereat said nozzle passage inlet is closed to a second position whereat said nozzle passage inlet is in fluid communication with said bore to a set degree, said movement from said first position to said second position occurring at a set frequency and at a set time for said second position whereby said additive is pulsed into said medium.

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