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PUMP

  • US 20190316573A1
  • Filed: 02/15/2019
  • Published: 10/17/2019
  • Est. Priority Date: 02/15/2018
  • Status: Active Grant
First Claim
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1. A pump, comprising:

  • a pump housing;

    first and second valves housed within the pump housing, each valve comprising;

    a valve body defining an inner chamber in fluid communication with a valve inlet and a valve outlet;

    a valve head positioned within the inner chamber, the valve head moveable between a first position and a second position;

    a valve seal defining an aperture in fluid communication with the valve inlet and having a sealing surface;

    a bi-directional sealing member positioned between a the valve head and the valve seal, the bi-directional sealing member movable between a first closed position where the bi-directional sealing member engages with the sealing surface of the valve seal to seal the aperture and a second open position where the bi-directional sealing member can disengage from the sealing surface of the valve seal to allow flow through the aperture of the valve seal; and

    a cam engaged with a first surface of the valve head, whereby rotation of the cam causes movement of the valve head between the first position and the second position and whereby movement of the valve head to the first position holds the bi-directional sealing member in the first closed position;

    a piston and a piston chamber, the piston chamber in fluid communication with an outlet of the first valve and an inlet of the second valve above the piston;

    a cam shaft comprising first and second cams, with the first cam engaging a valve head of the first valve and the second cam engaging a valve head of the second valve, the first and second cams oriented to open the first valve when the second valve is closed and to close the second valve when the first valve is open; and

    a crankshaft coupled to the piston for moving the piston within the piston chamber, the crankshaft configured to move the piston in a first direction when the first valve is open and the second valve is closed to draw fluid through the first valve and into the piston chamber and to move the piston in a second direction when the second valve is open and the first valve is closed to force the fluid from the piston chamber through the second valve.

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