Title:
Combination oil control ring
Document Type and Number:
Japanese Patent JP5980966
Kind Code:
B2
Abstract:
A combined oil control ring comprising a pair of annular side rails each having a gap, and an axially corrugated spacer expander arranged between the side rails; the corrugated spacer expander having on the inside seating tabs for pushing inner peripheral surfaces of the side rails; the side-rail-pushing surface of each seating tab being provided with a nitrided layer; an entire surface of each spacer expander except for those provided with the nitrided layer being coated with a plating film; and the plating film having Vickers hardness HV0.01 of 300 or less.
Inventors:
Takayuki Ichikawa
Takuma Sekiya
Takuma Sekiya
Application Number:
JP2015002946A
Publication Date:
August 31, 2016
Filing Date:
January 09, 2015
Export Citation:
Assignee:
Riken Co., Ltd.
International Classes:
F16J9/06; C23C8/26; C25D5/26; F02F5/00; F16J9/26
Domestic Patent References:
| JP2006292021A | ||||
| JP2006300224A |
Foreign References:
| US20090278320 | ||||
| WO2008059791A1 | ||||
| WO2012133714A1 |
Attorney, Agent or Firm:
Takaishi Tachibana
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