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:
Oct. 13, 1981
Filed:
Jan. 10, 1980
Edgar Mark, Lohr, DE;
G. L. Rexroth GmbH, Lohr, DE;
Abstract
An electrode-position control for arc furnaces includes a hydraulic cylinder-and-piston unit 1 having a cylinder chamber 43 and a piston 1 connectable with an electrode 4 to be moved; a control valve 8; a first pressure conduit 14, 15 which connects the control valve 8 with a source of pressure fluid, and a working conduit 17, 18 which connects the valve 8 with the chamber 43; a pre-selectable two-way valve 5, 6 in each of the conduits 14, 15; 17, 18 a second pressure conduit 34, 33, 17, 42 connecting the chamber 43 directly with the source; and a pre-selectable two-way valve 7 arranged in the second pressure conduit 34, 33, 17, 42 in parallel to the control valve 8, the valve 7 being closed when the valves 5, 6 are open, and vice versa.