Liquid flow control system
First Claim
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1. Liquid treatment apparatus for providing and controlling a flow of liquid, said apparatus comprising, in combination:
- a variable displacement liquid pump having a liquid inlet, a liquid outlet and a rotatable pump element;
a variable displacement liquid metering pump having a liquid inlet, a liquid outlet and a rotatable metering pump element;
containment structure defining a liquid flow path between the liquid outlet of said variable displacement liquid pump and the liquid inlet of said variable displacement liquid metering pump for containing liquid received from said variable displacement liquid pump and delivering said liquid to said variable displacement liquid metering pump through said liquid flow path; and
drive means for simultaneously driving and rotating both said rotatable pump element and said rotatable metering pump element to cause liquid flow within the liquid flow path of said containment structure between the liquid outlet of said variable displacement liquid pump and the liquid inlet of said variable displacement liquid metering pump.
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Abstract
Apparatus for controlling flow of a liquid includes a variable displacement liquid pump and a variable displacement liquid meter, the pump and meter being driven by the same drive motor. Containment structure defines a liquid flow path between the pump and meter for containing liquid received from the pump.
76 Citations
20 Claims
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1. Liquid treatment apparatus for providing and controlling a flow of liquid, said apparatus comprising, in combination:
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a variable displacement liquid pump having a liquid inlet, a liquid outlet and a rotatable pump element; a variable displacement liquid metering pump having a liquid inlet, a liquid outlet and a rotatable metering pump element; containment structure defining a liquid flow path between the liquid outlet of said variable displacement liquid pump and the liquid inlet of said variable displacement liquid metering pump for containing liquid received from said variable displacement liquid pump and delivering said liquid to said variable displacement liquid metering pump through said liquid flow path; and drive means for simultaneously driving and rotating both said rotatable pump element and said rotatable metering pump element to cause liquid flow within the liquid flow path of said containment structure between the liquid outlet of said variable displacement liquid pump and the liquid inlet of said variable displacement liquid metering pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for controlling flow of a liquid, said method comprising the steps of:
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pumping said liquid through a variable displacement liquid pump; after said pumping step, introducing said liquid into a confined liquid flow path; flowing the liquid within the confined liquid flow path; flowing liquid through said confined fluid flow path to and through a variable displacement liquid metering pump; and adjusting the displacement of at least one of said variable displacement liquid pump and variable displacement liquid metering pump to modify the flow of the liquid in said confined fluid flow path. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification