Let's say i have an air pump which produce plenty of air flow, but almost no pressure. Is there a simple way to turn this high flow, low pressure into high pressure, low flow? I'm thinking something akin to a gearbox turning fast spin, low torque of a motor into a high torque, slow spin output. Or basically something like a lever - a simple mechanical concentration of force. I tried putting a cone at the output, but it just reduces the amount of air going out without increasing the pressure.