Piston pump and method of manufacturing the same

A piston pump with near-circular cam design for improved longevity and efficiency, the piston pump comprising:

• a rotatably mounted crankshaft having
• a longitudinally extending crankshaft rotation axis, and
• one or more near-circular cams distributed along the crankshaft axis, each near-circular cam having
• one or more cam noses and one or more cam heels, the cam noses circumferentially alternating with the cam heels around the crankshaft axis, the cam noses all having a nose radius, the cam heels all having a heel radius, the nose radius being greater than the heel radius,
• a cam stroke length that is a difference between the nose radius and the heel radius, and
• a ratio of the nose radius to the heel radius of greater than 1 and less than 1.35;
• and
• one or more pistons, each piston in contact with a corresponding near-circular cam of the one or more near-circular cams, each piston slidably mounted relative to the crankshaft between a nose position when in contact with the cam nose of the corresponding near-circular cam, and a heel position when in contact with the cam heel of the corresponding near-circular cam.