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. 21, 2009
Filed:
Oct. 19, 2005
Dieter Figge, Essen, DE;
Dieter Figge, Essen, DE;
SMS Demag AG, Düsseldorf, DE;
Abstract
The invention relates to a method, device and a circuit for detecting surface defects such as cracks, fractures and the like on a roller () for a rolling mill (), in particular on the working rollers () which are mounted with support roller () on a vertical stand (). The rollers () are verified for detecting defects in the operation position thereof, transversal ultrasonic waves () whose frequency is approximately equal to 0.5-2 MHz are transmitted to the first end of the roller () and are received on the second end () thereof and during a measuring process an ultrasound transducer () and an ultrasound receiver () are pressed against the cylinder () surface for a test time.