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:
Jun. 20, 2023
Filed:
Nov. 06, 2019
Tpr Co., Ltd., Tokyo, JP;
Tpr Industry Co., Ltd., Yamagata, JP;
Masayuki Ohira, Tokyo, JP;
Naoki Umeda, Tokyo, JP;
Seiji Tamaki, Tokyo, JP;
Takashi Sato, Yamagata, JP;
Takashi Oizumi, Yamagata, JP;
TPR Co., Ltd., Tokyo, JP;
IPR Industry Co., Ltd., Yamagata, JP;
Abstract
The present invention addresses the problem of providing a cylinder liner or a cylinder bore, which can reduce not only friction on a sliding surface but also oil consumption. In a piston sliding direction of the cylinder bore, grooves of a second sliding region positioned on the side of crankcase have a higher groove area ratio at a depth of 0.3 μm than grooves of a first sliding region positioned on the side of combustion chamber, and the groove area ratio is in a specific range, whereby friction and oil consumption can be reduced.