Paper: Non-Counterbalanced Hydraulic Pumping Units A Progress Report

The history of hydraulics is a fascinating story dating back to about 1650, when Paschal discovered the fundamental laws of physics upon which all modern hydraulic equipment is based. About 1795, Joseph Bramah developed the first hydraulically operated press using water for power transmission. Since then many changes have been made, so that today there is scarcely a product which does not utilize hydraulics at some phase in its production. Hydraulic power is unique in the ease with which it may be controlled. The amount of force is almost unlimited and any practical stroke length is available.