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APPARATUS AND METHOD FOR DISPENSING A MIXTURE OF A GAS AND A FLUID MATERIAL

  • US 20080197209A1
  • Filed: 11/13/2007
  • Published: 08/21/2008
  • Est. Priority Date: 02/16/2007
  • Status: Active Grant
First Claim
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1. A gas injection device comprising:

  • a main body having an inlet configured to receive a pressurized gas, an outlet configured to exhaust the pressurized gas, a gas passage connecting said inlet and said outlet, and a control orifice in said gas passage, said control orifice configured to meter a flow rate of the pressurized gas to said outlet; and

    a flow control element in said gas passage, said flow control element having a first condition in which the pressurized gas can flow in said gas passage from said inlet through said control orifice to said outlet and a second condition in which the pressurized gas is blocked from flowing to said outlet.

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