Booster pump with sealing gasket including inlet and outlet check valves

A pump comprising:

• a housing including first and second housing sections;
• a gasket between the first and second housing sections;
• at least one fastener for holding the first and second housing sections together;
• said housing having at least first and second pumping chambers, an inlet, an inlet passage in the housing leading from the inlet to the pumping chambers, an outlet and an outlet passage in the housing leading from the pumping chambers to the outlet;
• first and second pumping members movable in the first and second pumping chambers, respectively, on an intake stroke whereby a fluid from the inlet passage is drawn into the pumping chamber and a discharge stroke whereby fluid in the pumping chamber is discharged into the outlet passage;
• a drive for moving the pumping members on the intake and discharge strokes;
• said gasket cooperating with the housing sections to form an inlet chamber in the inlet passage and an outlet chamber in the outlet passage;
• first and second inlet check valves for the first and second pumping chambers, respectively, each of said first and second inlet check valves including a movable valve element in the inlet chamber and a valve seat;
• first and second outlet check valves for the first and second pumping chambers, respectively, each of said first and second outlet check valves including a movable valve element in the outlet chamber and a valve seat;
• and
• said gasket forming a seal between the first and second housing sections and including the valve elements of the first and second inlet and outlet check valves.