Title:
OIL RING
Document Type and Number:
WIPO Patent Application WO/2019/142668
Kind Code:
A1
Abstract:
An oil ring 1 has an oil ring body 10 provided with a land 30 protruding diametrally outward, and a coil expander 20 that is mounted on a diametrally inward portion of the oil ring body and that biases the oil ring body diametrally outward. The land 30 has an upper surface 31 facing one way in an axial direction, an outermost circumferential surface 34 that comprises a cylindrical surface parallel to the axial direction and that faces diametrally outward at the diametrally farthest outward side, and a tapered surface 33 comprising part of a conical surface that diametrally expands from one axial side toward the other axial side, the tapered surface 33 being positioned between the upper surface 31 and the outermost circumferential surface 34. The angle that the tapered surface 33 forms with the axial direction is greater than 17° and less than 27°.
Inventors:
OKADA YOSHIO (JP)
ADACHI MITSUHIRO (JP)
ADACHI MITSUHIRO (JP)
Application Number:
PCT/JP2019/000071
Publication Date:
July 25, 2019
Filing Date:
January 07, 2019
Export Citation:
Assignee:
KK RIKEN (JP)
International Classes:
F16J9/20; F02F5/00; F16J9/06; F16J9/26
Domestic Patent References:
| WO2015125832A1 | 2015-08-27 | |||
| WO2004040174A1 | 2004-05-13 |
Foreign References:
| JP2013528757A | 2013-07-11 | |||
| JP2010530045A | 2010-09-02 | |||
| JPH09144881A | 1997-06-03 | |||
| JP2006194272A | 2006-07-27 | |||
| JPS5763951U | 1982-04-16 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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