Shaft member for fluid dynamic bearing device and manufacturing method for shaft member

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9931725
SERIAL NO

14908259

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Grinding is performed on an outer peripheral surface of a shaft member while rotationally driving the shaft member under a state in which both end surfaces of the shaft member are sandwiched between a pair of support portions. A convex surface is formed on one axial end surface of the shaft member or an end surface of one of the pair of support portions, and a flat surface is formed on the other of the one axial end surface of the shaft member and the end surface of the one of the pair of support portions. The flat surface and an apex of the convex surface are brought into contact with each other to support one axial end portion of the shaft member.

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Patent Owner(s)

Patent OwnerAddress
NTN CORPORATIONOSAKA-SHI OSAKA 550-0003

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirade, Jun Mie, JP 10 36
Komatsu, Shuichi Mie, JP 20 486

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