Combined oil ring

Details Combined oil ring Combined oil ring

1992-07-27

1994-05-03

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277215, 277235A, F16J 900

Patent

active

053080890

ABSTRACT:
In a three-piece combined oil ring comprising a pair of side rails and provided between them a spacer expander, the side rails are each provided in the inner edge thereof with a plurality of cutouts at given intervals, thereby providing a combined oil ring improved in its conformable property to any deformation of a cylinder bore. A nitrided layer is formed by plasma nitriding on each side rail only at its outer edge face, thereby preventing embrittlement of the side rails and improving the durability.

REFERENCES:
patent: 2297112 (1942-09-01), Phillips
patent: 2579698 (1951-12-01), Phillips
patent: 2713527 (1955-07-01), Pien
patent: 2817563 (1957-12-01), Marien
patent: 3131944 (1964-05-01), Sanon
patent: 3323807 (1967-06-01), Vanderbilt, Jr.
patent: 3606355 (1971-09-01), Minegishi
patent: 4612260 (1986-09-01), Kumaggi et al.
patent: 5154433 (1992-10-01), Naruse

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