Chemical dispensing system

  • US 5,564,595 A
  • Filed: 02/15/1995
  • Issued: 10/15/1996
  • Est. Priority Date: 02/15/1995
  • Status: Expired due to Fees
First Claim
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1. A chemical dispensing system for dispensing a preselected quantity of liquid chemical drawn from one of a plurality of storage vessels and dispensing that quantity of liquid chemical to one of a plurality of receptacles using a single operating pump, the dispensing system comprising:

  • (a) a remote controllable operating pump having a suction side and a discharge side;

    (b) a suction conduit having an upstream end, a midsection and a downstream end, the downstream end being in fluid tight communication with the suction side of the operating pump;

    (c) a plurality of inlet conduits, each inlet conduit being adapted to receive a quantity of liquid chemical from one of the plurality of storage vessels and to discharge such quantity of liquid chemical to the midsection of the suction conduit;

    (d) a plurality of remote controllable inlet valves, one inlet valve being operatively disposed within each inlet conduit for controlling liquid flow therein;

    (e) a discharge conduit having an upstream end, a midsection and a downstream end, the upstream end being in fluid tight communication with the discharge side of the operating pump;

    (f) a plurality of dispensing conduits, each dispensing conduit being adapted to receive a quantity of liquid chemical from the downstream end of the discharge conduit and to discharge such quantity of liquid chemical to one of the plurality of receptacles;

    (g) a plurality of remote controllable dispensing valves, one dispensing valve being operatively disposed within each dispensing conduit for controlling liquid flow therein;

    (h) a flow indicator operatively disposed within the upstream end of the discharge conduit for monitoring liquid flow therein, and generating a primary flow signal corresponding thereto;

    (i) a liquid flush conduit having an upstream end and a downstream end, the upstream end being connected in fluid tight communication with a source of pressurized liquid and the downstream end being connected in fluid tight communication with the upstream end of the suction conduit;

    (j) a remote controllable liquid flush valve operatively disposed within the liquid flush conduit for controlling liquid flow therein;

    (k) a computerized controller programmed to (i) receive operating instructions regarding the transferring of a quantity of chemical from one of the storage vessels to one of the receptacles and to (ii) control the dispensing system in accordance with the operating instructions by operating the inlet valves, the operating pump, the dispensing valves and the liquid flush valve while receiving and using the primary flow signal as flow information feedback.

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