| 摘要 |
<p>PCT No. PCT/DE97/00277 Sec. 371 Date Mar. 15, 1999 Sec. 102(e) Date Mar. 15, 1999 PCT Filed Feb. 13, 1997 PCT Pub. No. WO97/32137 PCT Pub. Date Sep. 4, 1997An electromagnetically actuated directional control valve is proposed, whose control slide (18) can be switched against a restoring spring system (45) into three switching positions (39, 41, 42) by a double-lift magnet (12). The spring system (45) has a strong spring (31) and a counter-acting weak spring (37), which are disposed on both sides of the control slide (18). With a pushing magnet (12), the control slide (18) is solely deflected against the weak spring (37), which is supported on it over the entire lift area. With a pulling magnet (12), a spring plate (32), which centers the center position (39), is pulled way from the control slide (18), which now is displaced by the weak spring (37), against the force of the strong spring (31). The tappet (29), connected with the armature, and the control slide (18) are separate independent components, which only form a frictionally connected operative connection.</p> |
