Piston ring for internal combustion engine
Latest KABUSHIKI KAISHA RIKEN Patents:
FIG.
FIG.
FIG.
FIG.
FIG.
FIG.
FIG.
FIG.
FIG.
FIG.
The dash-dash broken lines depict portions of the piston ring which form no part of the claimed design and the dot-dash-dot broken lines depict the boundary of the claimed design and form no part thereof.
Claims
The ornamental design for a piston ring for an internal combustion engine, as shown and described.
3655208 | April 1972 | Walker |
4192051 | March 11, 1980 | Bergeron |
4251083 | February 17, 1981 | Montes |
4449721 | May 22, 1984 | Tsuge |
5253878 | October 19, 1993 | Miura |
D394866 | June 2, 1998 | Lee |
5836589 | November 17, 1998 | Sakata |
5934685 | August 10, 1999 | Danzer |
6470792 | October 29, 2002 | Michel |
D881958 | April 21, 2020 | Han |
20010045703 | November 29, 2001 | Scarlett |
20130305918 | November 21, 2013 | Okazaki |
20140246835 | September 4, 2014 | Stiehler |
20160305545 | October 20, 2016 | Okazaki |
20190195363 | June 27, 2019 | Shimizu |
20200018395 | January 16, 2020 | Shimizu |
Type: Grant
Filed: Mar 25, 2019
Date of Patent: May 25, 2021
Assignee: KABUSHIKI KAISHA RIKEN (Tokyo)
Inventor: Hiroshi Shimizu (Kashiwazaki)
Primary Examiner: Nathaniel D. Buckner
Application Number: 35/507,464