HYDRAULIC PRESSURE SPRING AND METHOD OF PRODUCING THE SAME

摘要

A hydraulic pressure spring (1) has a hollow circular cylinder (4) having at one end (2) a screw thread (3), closure means (5) threaded to the screw thread (3) on the one end (2) of the cylinder (4) and closing the one end (2), closure means (7) provided on the other end (6) of the cylinder (4) and closing the other end (6), compressible liquid (9) sealed in the inside (8) of the cylinder (4) and pressurized to a predetermined pressure, a rod (10) movably penetrating in the direction of axis A through the closure means (5) and increasing the pressure of the liquid (9) in the inside (8) of the cylinder (4) by entering the inside (8), and a piston (11) placed in the inside (8) of the cylinder (4) and attached to one end of the rod (10).