Abstract: A hydraulic press having at least two cylinders adapted for providing relative displacement between the upper and lower platens of a hydraulic press, each cylinder being in fluid communication with only one chamber of a multiple chamber hydraulic system utilizing a common ram operating through all chambers, the ram portion in each chamber having a predetermined ratio of area of the ram in the direction of actuation to volume of hydraulic fluid within its chamber to provide equal find displacement in each chamber or movement of the ram.

Abstract: A light-weight press for punching, forming, etc., in which the guide pins are bored in order that pull rods may be passed therethrough from actuating cylinders to an adjustment mechanism that interrelates the upper ends of the guide pins with the platen of the press. The adjustment mechanism are connected to each other so as to operate simultaneously and ensure that the forces in the press do not become unbalanced. Downward movement of the platen is limited by striking of the upper ends of the guide pins by stop elements associated with the pull rods.