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. 16, 2025
Filed:
Jun. 09, 2020
Applicant:
Sumitomo Electric Sintered Alloy, Ltd., Takahashi, JP;
Inventors:
Junpei Hara, Takahashi, JP;
Seiji Sakamoto, Takahashi, JP;
Assignee:
SUMITOMO ELECTRIC SINTERED ALLOY, LTD., Takahashi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F 5/06 (2006.01); B22F 3/03 (2006.01); B22F 3/24 (2006.01); B33Y 80/00 (2015.01);
U.S. Cl.
CPC ...
B22F 5/06 (2013.01); B22F 3/24 (2013.01); B33Y 80/00 (2014.12);
Abstract
A cylindrical sintered material made of metal, in which one of an inner peripheral surface and an outer peripheral surface of the sintered material includes: a plurality of helical teeth arranged in parallel along a circumferential direction of the sintered material; and a sizing mark provided on at least a part of a tooth bottom surface, a tooth surface, and a tooth tip surface of each of the helical teeth, the helical tooth has a tooth profile error less than or equal to 6 μm, and the helical tooth has a tooth trace error less than or equal to 27 μm.