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:
Apr. 21, 2020
Filed:
Nov. 30, 2017
Mitutoyo Corporation, Kawasaki-shi, Kanagawa, JP;
Takeshi Hagino, Tsukuba, JP;
Yuichiro Yokoyama, Abiko, JP;
MITUTOYO CORPORATION, Kawasaki, JP;
Abstract
A step gauge and a reference gauge block are placed in a temperature-controlled chamber in parallel with each other. A temperature of the step gauge is changed to a first temperature and a second temperature using a measurement-target temperature adjuster and the temperature-controlled chamber. A distance between a first surface and a second surface of the step gauge is relatively measured at each of the first and second temperatures with reference to a distance between a first reference surface and a second reference surface of the reference gauge block. A coefficient of thermal expansion of the measurement target is calculated from the length of the measurement target at the first temperature and the length of the measurement target at the second temperature.