Hollow shaft

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12083571
APP PUB NO 20220143664A1
SERIAL NO

17430859

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A hollow shaft includes a cylindrical main body part and an extremity drawn part that is integrally connected to one end of the main body part on the same axis and whose diameter is made smaller than a diameter of the main body part by drawing processing, wherein an inner peripheral face of the main body part and an inner peripheral face of a base portion, which is continuous with one end side of the main body part, of the extremity drawn part are formed as cut faces that are subjected to cutting processing before the drawing processing, and an inner peripheral face of a tip portion, which is continuous with an extremity side of the base portion, of the extremity drawn part is a non-cut face. Accordingly, the hollow shaft can be molded with high shape precision while maintaining a low drawing ratio for an extremity drawn part.

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Patent Owner(s)

Patent OwnerAddress
MUSASHI SEIMITSU INDUSTRY CO LTD39-5 AZA DAIZEN UETA-CHO TOYOHASHI-SHI AICHI 441-8560

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Murata, Shinichi Toyohashi, JP 106 886

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