Electrohydraulic control arrangement

Fluid handling – Convertible – Unit orientable in a single location between plural positions

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Details

91420, 137491, 1375395, 13759612, 13759616, 1375962, 13762564, 251129, F15B 1308

Patent

active

043579558

ABSTRACT:
An electrohydraulic control arrangement comprising at least one terminal plate having an inlet port connected to a pump pumping fluid under pressure from a tank and an outlet port connected to a return conduit leading to the tank and a plurality of consumer plates having consumer ports connected to consumers of pressure fluid. All plates are arranged side by side and held in abutting relationship by tightening screws extending through axially aligned bores through said plates. The plates are further provided with three axially aligned fluid channels therethrough, one to be connected to the inlet port and the two others to the outlet port. The selective connection of the fluid channels to the respective ports is accomplished in the terminal plate by a control slide movable by auxiliary valves, one of which is controlled by an electromagnet and by an additional control slide in each of the consumer plates, the position of which is controlled by two additional auxiliary valves. Each of the consumer plates includes two further auxiliary valves cooperating with a control piston in such a manner that when one of the consumer ports of the respective consumer plate is connected to the inlet port, the other is automatically connected to the outlet port.

REFERENCES:
patent: 2591800 (1952-04-01), Gardiner
patent: 3151630 (1964-10-01), Tennis
patent: 3402736 (1968-09-01), Trick
patent: 3416561 (1968-12-01), Kokaly
patent: 3677287 (1972-07-01), Morris
patent: 3818936 (1974-06-01), Jackoboice et al.
patent: 3827255 (1974-08-01), Kish
patent: 4121610 (1978-10-01), Harms et al.
patent: 4194719 (1980-03-01), Ewald et al.

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