Title:
WIRE ROD FOR TAPER FACED COMPRESSION RING AND TAPER FACED COMPRESSION RING
Document Type and Number:
WIPO Patent Application WO/2014/024799
Kind Code:
A1
Abstract:
In order to provide a wire rod for taper faced compression rings with which the run-in surface (contact surface) can be formed uniformly and rapidly in a taper faced compression ring manufacturing process, the wire rod has a configuration wherein: the surface to become the outer circumferential surface of the ring has a first taper section and a second taper section that are adjacent to each other and inclined toward the outer circumference; the angle of inclination (θ2) of the second taper section is larger than the angle of inclination (θ1) of the first taper section; and the outer circumferential edge of the second taper section protrudes 0.005-0.05 mm to the outer circumferential side of the outer circumferential edge of the first taper section. In order to provide a taper faced compression ring with a long service life that reduces friction and also leads to improved fuel efficiency, the taper faced compression ring is manufactured from said wire rod and has a configuration wherein: the second taper section has a lapping surface; and the lapping surface protrudes 0.001-0.048 mm in the radial direction past the outer circumferential edge of the first taper section.
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Inventors:
WATANABE MAMORU (JP)
Application Number:
PCT/JP2013/071020
Publication Date:
February 13, 2014
Filing Date:
August 02, 2013
Export Citation:
Assignee:
RIKEN KK (JP)
International Classes:
F02F5/00; F16J9/20
Foreign References:
| JPS4427300Y | ||||
| JP2011169388A | 2011-09-01 | |||
| JPH0742417U | 1995-08-04 | |||
| JPH10252891A | 1998-09-22 | |||
| JP2002323133A | 2002-11-08 |
Other References:
See also references of EP 2884136A4
Attorney, Agent or Firm:
TAKAISHI Kitsuma (JP)
Kitsuma Takaishi (JP)
Kitsuma Takaishi (JP)
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