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:
May. 12, 2015
Filed:
Feb. 06, 2013
Kubota Corporation, Osaka-shi, JP;
Hiroki Kuwayama, Sakai, JP;
Takahiro Yamazaki, Sakai, JP;
Yutaka Ishigaki, Sakai, JP;
Hideyuki Koyama, Sakai, JP;
Manabu Miyazaki, Sakai, JP;
Yoshinori Tanaka, Sakai, JP;
Keita Naito, Sakai, JP;
Hidetaka Morinaga, Sakai, JP;
KUBOTA Corporation, Osaka-shi, Osaka, JP;
Abstract
An engine in which an oil consumption and a leakage of blow-by gas can be stably reduced for a long period of time. The engine includes a first land (), a first ring groove (), a second land (), a second ring groove (), a third land (), a third ring groove (), and a piston skirt () formed on a piston peripheral wall () in the above-recited order from a side of a piston head (). A first pressure ring () is fitted in the first ring groove (). A second pressure ring () is fitted in the second ring groove (), an oil ring () fitted in the third ring groove (), and an indentation () is formed at the second land ().