| 摘要 |
<p>The valve controls the fluid supply and return of a working cylinder. Each cylinder space has two valves, hydraulically actuated by pistons. The actuating pistons have a smaller dia. than the valves. During reversal, the open path/seat valve is closed by pressure changes at the actuating piston, and the closed valve is opened only after the pressure in the working cylinder chamber is at the same level as that in the supply/return. The two pressures are brought to the same level by the movement energy of a mass, which is connected to the working cylinder and which continuously moves during reversal. The main lever has a start-up position, in which only an actuating fluid supply is possible. In an active position, the working fluid is supplied, after the switching of the valves.</p> |
