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. 26, 1977
Filed:
Sep. 04, 1975
Shozo Iwasaki, Ebina, JA;
Abstract
A hardness tester for measuring hardness of a material by pressing an indenter attached to the lower end of a load application shaft into the test specimen. A reference cylinder is coaxially and slidably fitted around the load application shaft, and a datum plane, to be in contact with the specimen, is formed at the lower end of the reference cylinder, so as to limit the penetration depth of the indenter into the specimen to a predetermined constant depth. A stop device is provided for regulating the descending of the load application shaft relative to the reference cylinder. A load detector for hardness measurement is interposed on the load application shaft, to measure the hardness of the specimen by measuring the force applied to produce an indentation of a predetermined size on it.