| 摘要 |
The method is carried out so that by one of the pistons (4,5) at the end of its inward movement, a non return valve (8,9) of the associated cylinders (2,3) is opened against its closed direction mechanically whilst a non return valve (8,9) of the respective other cylinder (2,3) is held open, during the operation duration of the way valve (19), by the working pressure of the hydraulic pump (15) in such a manner. The hydraulic liquid is returned back, through the non-return valves (8,9), connected in series the opposed closing directions, in a sump (34) of the hydraulic pump (15). The way valve (19) is operated, so long until about, gases with hydraulic liquid located in the cylinders (2,3), are led off to the sump (24) of the hydraulic pump (15), in which they are removed from the hydraulic circuit. |
