A pressure compensator for oleodynamic applications

A hydraulic circuit comprising:

• a pressure compensator, a high pressure main cylinder, a pressure gauge and said pressure compensator (1) connecting said high pressure main cylinder (100) and said pressure gauge, said main cylinder (100) having a first chamber (101) and a second chamber (102) in which a piston (103) of said main cylinder (100) slides, said pressure compensator comprises two cylinders (2, 3):
• a compensating cylinder (2) in which slides a first piston (21) comprising a first piston rod (4), and a reducing cylinder (3), in which slides a second piston (31) comprising a second piston rod (5);
• the compensating cylinder (2) being coupled to said main cylinder (100);
• said reducing cylinder (3) comprising at least a low pressure chamber (32′) connected to said pressure gauge;
• a displacement of the piston rod of the reducing cylinder (3) either increasing or decreasing the pressure in said low pressure chamber, proportionately to the working pressures in the main cylinder (100), characterized in that the first piston rod (4) of the first piston (21) of the compensating cylinder (2) is axially connected to the second piston rod (5) of the second piston (31) of the reducing cylinder (3) through a connecting joint (6) arranged in a spider assembly (7), that the compensating cylinder (2) comprises a first chamber (32) and a second chamber (33), respectively coupled to said first chamber (101) and said second chamber (102) of said main cylinder (100), and that a size of said compensating cylinder (2) is designed as to provide a same ratio of the working surfaces of the main cylinder (100), at the bottom and piston rod sides, thereby, to a given position of the piston (103) of the main cylinder (100) corresponds a precise position of the first piston (21) of the compensating cylinder (2)