Oil ring

Details Oil ring Oil ring

2008-04-08

2008-04-08

Patel, Vishal (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Piston ring or piston ring expander or seat therefor

C277S459000

Reexamination Certificate

active

10527637

ABSTRACT:
It is a main object of the present invention to provide an oil ring which is capable of reducing sliding friction even in a high speed revolution region of a piston, and capable of reducing the consumption of oil. To achieve the object, the present invention provides an oil ring which is formed into cross-section substantially of an I-shape that two rails are connected at a columnar portion thereof, wherein a sliding projection formed in each of the two rails comprises an outer side surface of sliding projection which forms an outer portion of the sliding projection, a inner side surface of sliding projection which forms an inner portion of the sliding projection, and a sliding surface which slides on a cylinder inner wall and forms a tip end of the sliding projection;wherein a taper angle of the outer side surface of sliding projection is in a range of 10° to 60°; andwherein the outer edge portion, where the outer side surface of sliding projection and the sliding surface are joined to each other, is formed into the curved surface, and the sliding surface has the curved surface sliding portion which is joined to the outer side surface of sliding projection and formed into a gently curved surface.

REFERENCES:
patent: 2554289 (1951-05-01), Anderson
patent: 2712971 (1955-07-01), Phillips
patent: 4045036 (1977-08-01), Shunta
patent: 4497497 (1985-02-01), Berti et al.
patent: 7077402 (2006-07-01), Katumaru et al.
patent: 4429649 (1996-02-01), None
patent: 19939002 (2000-08-01), None
patent: 0672850 (1995-09-01), None
patent: 42 62661 (1971-04-01), None
patent: 55-140449 (1982-04-01), None
patent: 57-63951 (1982-04-01), None
patent: 58-190809 (1985-07-01), None
patent: 60-97345 (1985-07-01), None
patent: 2-402079 (1992-08-01), None
patent: 4-95169 (1992-08-01), None
patent: 09-144881 (1997-03-01), None
patent: 071021 (2002-08-01), None

Affiliated with

Also associated with

Rating

Oil ring does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oil ring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil ring will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3940937