Electrohydraulic signal converter

Details Electrohydraulic signal converter Electrohydraulic signal converter

1990-07-30

1991-07-02

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

13762564, 13762562, G05D 1620

Patent

active

050278568

ABSTRACT:
An electrohydraulic signal converter includes an armature which is movable in a magnetic field generated by field coils and is located between two inlet channel orifices that are provided with restrictors. Drain channels are connected downstream from the orifices and lead to a pressureless tank. The armature is connected to the orifices so that a pressure differential can be produced between the pair of inlet channels in the converter. In order to keep the loss of oil of the signal converter low, the orifices are closed when the armature is in its neutral or central position. When the armature is moved from its neutral position, the orifice away from the armature is opened and permits the flow of hydraulic oil from one inlet channel to a drain channel. The orifices are each formed by a borehole into which can be inserted a cylindrical projection on each front face of the armature.

REFERENCES:
patent: 2983278 (1961-05-01), Heintz
patent: 4335645 (1982-06-01), Leonard
patent: 4352367 (1982-10-01), Pollman
patent: 4526201 (1985-07-01), Geyler
patent: 4682629 (1987-07-01), Deininger

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