Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.

A push rod is a connecting link in an operating mechanism. Two examples are the rod between the valve lifter and rocker arm on an overhead valve engine, and push rods at the piston ends which apply ...

Traditional sucker rod pumps (SRP) use a single traveling valve, but recent double traveling valve innovations have improved SRP performance and efficiency in field applications with double traveling ...