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:
Feb. 02, 2021
Filed:
Dec. 12, 2018
Applicants:
Tpr Co., Ltd., Tokyo, JP;
Tpr Industry Co., Ltd., Yamagata, JP;
Inventors:
Assignees:
TPR Co., Ltd., Tokyo, JP;
TPR Industry Co., Ltd., Yamagata, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P 11/00 (2006.01); F02F 1/00 (2006.01); F16J 10/04 (2006.01); B22D 19/08 (2006.01);
U.S. Cl.
CPC ...
F02F 1/004 (2013.01); B22D 19/08 (2013.01); F16J 10/04 (2013.01); F02F 2200/06 (2013.01);
Abstract
To provide a cast iron cylindrical member capable of improving the bonding strength when metal on the outer peripheral side and the cast iron cylindrical member are integrated. For this objective, in a cast iron cylindrical member including a plurality of projections including constricted projections on the outer peripheral surface, the anchor portion index (I) represented by {(A−B)×π/4×Pn×Pr/100}×0.35H/2 is set in a specific range.