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:
Nov. 13, 1990
Filed:
Feb. 16, 1989
NGK Insulators, Ltd., , JP;
Abstract
An ultrasonic flaw detecting method able to detect defects of structural balls arranged in an ultrasonic transmitting medium with the aid of reflecting ultrasonic echoes transmitted from an ultrasonic flaw detecting probe immersed in the ultrasonic transmitting medium. The ball to be tested is arranged on two sets of ball driving rollers and the driving rollers are driven to rotate the ball during the test. An ultrasonic flaw detecting apparatus comprises ball driving rollers each including a shaft portion and a ball driving portion having a circular shape in a section perpendicular to the shaft portion to rotate the ball arranged on the ball driving rollers when the ball driving rollers are rotated, and an ultrasonic flaw detecting probe adapted to rotate about the ball for transmitting ultrasonic waves to the ball to scan defects of the ball.