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:
Apr. 21, 2026
Filed:
Mar. 13, 2023
Tpr Co., Ltd., Tokyo, JP;
Tpr Industry Co., Ltd., Sagae, JP;
Takashi Sato, Sagae, JP;
Yasutomo Tokairin, Sagae, JP;
Koji Kamata, Sagae, JP;
Kiyoyuki Kawai, Tokyo, JP;
TPR CO., LTD., Tokyo, JP;
TPR INDUSTRY CO., LTD., Sagae, JP;
Abstract
In order to enable improvement with respect to recycling performance, achieve further reduction in weight, and improve environmental performance, a cylinder liner () according to the present disclosure has a structure in which, out of an inner face () of a cylinder () in a reciprocating engine, the cylinder liner is provided in only a partial region over which a piston ring () fit onto a piston () that performs reciprocal motion in the cylinder () slides, and a liner entire length L along an axial direction of the cylinder () is smaller than an inner diameter B of the cylinder, and recessed and protruding forms are formed on one lower end portion () that is an end portion toward a bottom dead center side of the piston ring () in the axial direction.