Electrohydraulic signal converter
US5027856A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1990 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Jul 30, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86614
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.