Invention Grant
- Patent Title: Piston ring
- Patent Title (中): 活塞环
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Application No.: US12196303Application Date: 2008-08-22
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Publication No.: US08088496B2Publication Date: 2012-01-03
- Inventor: Tomotaka Kariya , Etuo Tamegai , Hiromi Ishikawa , Makoto Tsuruta
- Applicant: Tomotaka Kariya , Etuo Tamegai , Hiromi Ishikawa , Makoto Tsuruta
- Applicant Address: JP Saitama JP Tokyo
- Assignee: Nippon Piston Co., Ltd,STT Inc.
- Current Assignee: Nippon Piston Co., Ltd,STT Inc.
- Current Assignee Address: JP Saitama JP Tokyo
- Agency: Young & Thompson
- Priority: JPP2007-218664 20070824; JPP2008-191764 20080725
- Main IPC: B32B3/02
- IPC: B32B3/02 ; B32B3/10 ; B32B15/04 ; B32B15/08 ; B32B15/088 ; F16J9/26
Abstract:
A piston ring includes a piston ring body and a surface coating film formed on at least one of upper and lower surfaces of the piston ring body. The surface coating film has a most outside surface layer including a heat-resistant resin and a metal powder contained in the heat-resistant resin and a base bottom layer formed nearest the piston ring body and including a heat-resistant resin. The base bottom layer may also include a metal powder.
Public/Granted literature
- US20090051123A1 PISTON RING Public/Granted day:2009-02-26
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