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. 12, 1994
Filed:
Nov. 04, 1992
Otto Hein, Steyr, AT;
Abstract
In controlling the passage of rolled stock under little longitudinal tensile stress through a continuous rolling mill by secondary-controlled hydrostatic drives for the individual rolling stands, the rotary speeds of the hydromotors associated with the drives are controlled by adjusting their displacement volumes. To obtain a rational and dependable control method, at the beginning of the passage of the stock, all but one of the rotary speed controls for the hydromotors belonging to the stands through which the stock has passed and the stand through which the stock passes next as the passage of the stock through the stands proceeds are consecutively interrupted during the consecutive passing of the stock through the rolling stands and, therefore, at any time only the hydromotor of one of the stands, the guiding stand, is operated with an adjustable displacement volume for controlling the rotary speed at least as long as the stock passes through all the stands.