The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 1991
Filed:
Jul. 30, 1990
Horst Deininger, Hoerstein, DE;
Linde Aktiengesellschaft, , DE;
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.