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:
Sep. 15, 1981
Filed:
Oct. 31, 1979
Ichiro Tominaga, Kobe, JP;
Teruo Sasaki, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Hyogo, JP;
Abstract
A method of measuring hardness of a flexible thread-wound golf ball or its inner core which includes the steps of holding the flexible thread-wound golf ball or its inner core to be measured between a transmitter coupled to an ultrasonic wave oscillating source and a receiver coupled to an ultrasonic wave detecting device which detects the ultrasonic wave received by said receiver, applying from the transmitter, the ultrasonic wave having predetermined frequency to the flexible thread-wound golf ball or its inner core, and measuring the hardness of the flexible thread-wound golf ball or its inner core selectively by or based on the propagation time of the ultrasonic wave passing through the central portion of the flexible thread-wound golf ball or its inner core.