Patent ID: 8430645

Claim:
A pump comprising: a housing; an actuator member positioned within said housing for controlling the flow generated by said pump; a first decrease port connected to said housing, said first decrease port having a surface area in operable contact with said actuator member; a second decrease port connected to said housing having a surface area in operable contact with said actuator member, wherein said first decrease port and said second decrease port are connected at a same side of said housing and act on a same side of said actuator to exert a control force on said actuator in one direction based on said pressures in said first decrease port and said second decrease port; a valve connected to said second decrease port for controlling the flow of fluid to said second decrease port; a suction passage connected to said housing for drawing fluid into said housing using said actuator member; and a discharge passage connected to said housing wherein fluid exits said housing after said actuator member pressurizes said fluid.