| 摘要 |
A load cycle valve actuated by a weighing valve (9), controlled as a function of the load, for the automatic reversing of a control device having a double seat valve (17, 18 and 17, 25) arranged between two chambers serves for the pressure actuation of a main (3) or an additional brake device (8). The actuation of a first piston (33) by a pressure medium pressure (10) proportional to full load when switching from empty to full-load operation acts on a valve member (24) in the opening direction of the valve (17, 18) connecting the two chambers to one another. For the duration of the actuation of both chambers a second piston (23) is loaded with the set brake pressure (5a) and the valve member (24) is locked in a position corresponding to full load until the brake is released, so that any reductions of the pressure (10) proportional to the load cannot lead to jerky operation of the brake. <IMAGE> |
