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:
Mar. 20, 1990
Filed:
Jan. 26, 1988
Applicant:
Inventor:
Robert A Jaquay, Pittsburgh, PA (US);
Assignee:
United Engineering, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
72245 ; 91361 ; 91459 ; 72-8 ; 72 11 ; 72 20 ;
Abstract
A pre-set fluid actuator for setting the roll gap of a rolling mill having a transducer for detecting actuator movement and an electrohydraulic servovalve for controlling its position, a control system for compensating for the compressibility of the actuator fluid caused by the rolling force in a manner that requires no operation of the servovalve by creating a pre-set anticipating compression compensation signal and reducing the output of this signal by the output of a signal representing the actual fluid compression caused by the actual rolling force.