公开(公告)号：EP2672151B1

公开(公告)日：2017-05-10

申请号：EP12742580.9

申请日：2012-01-31

申请人： Kabushiki Kaisha Riken

发明人： OKAZAKI Fumihiro ,  SHIBANO Tomoya ,  SUGIHARA Hiroyuki ,  KOBAYASHI Hiroyuki

IPC分类号： F16J9/26 ,  F02F5/00 ,  F16J9/06 ,  F16J9/14 ,  F16J9/28

CPC分类号： F16J9/00 ,  F16J9/061 ,  F16J9/14 ,  F16J9/26 ,  F16J9/28

公开(公告)号：EP2672151A1

公开(公告)日：2013-12-11

申请号：EP12742580.9

申请日：2012-01-31

申请人： Kabushiki Kaisha Riken

发明人： OKAZAKI Fumihiro ,  SHIBANO Tomoya ,  SUGIHARA Hiroyuki ,  KOBAYASHI Hiroyuki

IPC分类号： F16J9/26 ,  F02F5/00 ,  F16J9/06 ,  F16J9/14

CPC分类号： F16J9/00 ,  F16J9/061 ,  F16J9/14 ,  F16J9/26 ,  F16J9/28

摘要： A combined piston ring comprising a special gap effective for reducing blowby to have excellent gas sealability, comprising a piston ring body of a high-strength, heat-resistant resin comprising a step-shaped gap exposed on upper and lower side surfaces and an outer peripheral surface, and a spring disposed on the inner peripheral side of the piston ring body for pushing the piston ring body radially outward, at least a side surface of the piston ring body on the combustion chamber side having a heat-resistant coating, whereby the side surface of the piston ring on the combustion chamber side is not subject to local deformation and melting by a burned gas from the combustion chamber.