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:
Dec. 07, 1999
Filed:
Feb. 04, 1998
Tomoyasu Imai, Kariya, JP;
Ryouhei Mukai, Nagoya, JP;
Hideki Nagano, Nagoya, JP;
Koji Nishi, Anjo, JP;
Hisashi Nakamura, Nagoya, JP;
Masahiro Ido, Kariya, JP;
Yutaka Hayashi, Chiryu, JP;
Eiji Fukuta, Aichi-ken, JP;
Satoshi Yamaguchi, Aichi-ken, JP;
Toyoda Koki Kabushiki Kaisha, Kariya, JP;
Abstract
A grinding wheel is for use in a grinding machine, and is attached on a wheel spindle of the grinding machine for simultaneously grinding at least two parts of a workpiece. The grinding wheel includes at least two wheel cores. Each of wheel cores has a disk-like shape. An abrasive layer is disposed on a circumferential surface of each of the wheel cores. A spacer portion is inseparably fixed on at least one of the wheel cores for keeping a space between the abrasive layers of the wheel cores. And a first labyrinth portion located on one of side surfaces of one of the wheel cores for forming a labyrinth seal with a second labyrinth portion arranged on the grinding machine. The number of separable parts of the grinding wheel are extremely decreased in consideration of imbalance of every part. The spacer portion is integral with at least one of the wheel cores. Since the grinding wheel is easily accurately balanced, vibration of the grinding wheel is decreased and stability is enhanced when the wheel spindle is driven at very high speed. As a result, machining accuracy for grinding is enhanced.