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.

Date of Patent:
Feb. 05, 2013

Filed:

Mar. 12, 2010
Applicants:

Masao Kume, Tochigi, JP;

Koji Saito, Tochigi, JP;

Inventors:

Masao Kume, Tochigi, JP;

Koji Saito, Tochigi, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24B 9/02 (2006.01);
U.S. Cl.
CPC ...
Abstract

An inner surface grinding tool is provided with a plurality of machining units for simultaneously machining inner surfaces of a plurality of portions of a workpiece. The plurality of machining units respectively include expanding and contracting mechanisms and grinding blade portions. In the respective machining units, outer diameters of the respective grinding blade portions are capable of individually expanding and contracting by the respective expanding and contracting mechanisms.


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Kume, Masao. (2013). Inner surface grinding tool (U.S. Patent No. 8366519). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8366519

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