Pump

A variable flow pump comprising:

• a swashplate coupled with a driveshaft for rotatably driving the swashplate, the swashplate movable between a first tilt angle relative to the driveshaft and a second tilt angle relative to the driveshaft;
• a piston pump interacting with the swashplate for being reciprocatingly driven based upon, at least in part, the tilt angle of the swashplate;
• an actuator piston moveable between a first position and a second position based upon, at least in part, a downstream backpressure of a fluid pumped by the piston pump;
• and
• an actuator assembly moveable between a first position and a second position based upon, at least in part, the position of the actuator piston, the actuator assembly including:
• a swashplate driver configured urge the swashplate between the first tilt angle and the second tilt angle,
• a biasing driver configured to apply a force urging the swashplate into contact with the swashplate driver, and
• a biasing member biasing the actuator assembly toward the second position, the biasing member comprising a plurality of springs radially spaced around a longitudinal axis of the driveshaft.

A variable flow pump comprising:

• a swashplate coupled with a driveshaft for rotatably driving the swashplate, the swashplate movable between a first tilt angle relative to the driveshaft and a second tilt angle relative to the driveshaft;
• a piston pump interacting with the swashplate for being reciprocatingly driven based upon, at least in part, the tilt angle of the swashplate;
• an actuator piston moveable between a first position and a second position based upon, at least in part, a downstream backpressure of a fluid pumped by the piston pump;
• an actuator assembly moveable between a first position and a second position based upon, at least in part, the position of the actuator piston, the actuator assembly including a swashplate driver configured urge the swashplate between the first tilt angle and the second tilt angle, and a biasing driver configured to apply a force urging the swashplate into contact with the swashplate driver, the biasing driver comprising an expandable member disposed between an actuator body of the actuator assembly and the swashplate.