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Dispensing a viscous use solution by diluting a less viscous concentrate

  • US 5,816,446 A
  • Filed: 01/23/1997
  • Issued: 10/06/1998
  • Est. Priority Date: 02/23/1995
  • Status: Expired due to Term
First Claim
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1. An apparatus for diluting a liquid concentrate with a liquid diluent to form a use solution, the apparatus comprising:

  • (a) an aspirator comprising a first inlet port for receiving a stream of the liquid diluent said diluent at water service line pressure of less than about 60 psi, a nozzle opening for the liquid diluent, a second inlet port for receiving a stream of the liquid concentrate having a viscosity of about 10 to 1000 cP, and an outlet port for the use solution having a viscosity of about 100 to 4000 cP;

    (b) liquid diluent conducting means connected to the first inlet port and liquid concentrate conducting means connected to the second inlet port of the aspirator for supplying thereto the liquid diluent and the liquid concentrate respectively; and

    (c) a liquid conducting outlet means having a throat and a passageway connected to the outlet port for dispensing the use solution having a viscosity greater than the liquid concentrate, from the apparatus;

    wherein the use solution has a higher viscosity than the concentrate or the diluent, the ratio of the diameter of the opening to the throat and the passageway to the diameter of the nozzle opening is greater than 1.4;

    1 and the liquid conducting outlet means comprises flow restriction means having a diameter smaller than the diameter of the passageway causing the passageway to fill with use solution.

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