HYDRAULIC PRESSURE TRANSFORMERS

摘要

The present invention relates to a hydraulic pressure intensifier that has all of the advantages of the pneumatic cylinder and the hydraulic cylinder and includes first operating chambers, a hydraulic operating chamber, front and back operating chambers, and second operating chambers formed sequentially from the front side thereof. The front and back operating chambers and the hydraulic operating chambers are connected through an excess flow bore, and an operating rod is moved forwardly by the supply of the air pressure to the first operating chambers and the front and back operating chambers. Then, only upon the application of a high load the air pressure is selectively supplied to the second forwardly moving operating chamber through a pilot valve and a master valve, thereby generating a high pressure in the hydraulic operating chamber.