US 2018/0023702 A1Published application

Oil ring

AssigneeRiken

InventorsDaisuke NAKAMURA, Kazuyuki YAMAHATA, Mitsuhiro ADACHI

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Abstract

An oil ring (1) includes an oil ring body (10) and a coil expander (20). The oil ring body (10) includes a pair of rail portions (12) each including an end portion of an outer periphery having a land (30) formed protruding radially outward from each rail portion (12). The land (30) includes an upper axial portion (31) and a lower axial portion (32) facing opposite to each other in an axial direction, a tapered portion (33) having one axial end contiguous to the upper axial portion (31) via a first curved portion (35), and a protruding portion (34) having one of axial ends contiguous to the tapered portion (33) and the other axial end contiguous to the lower axial portion (32) via a second curved portion (36). The protruding portion (34) is protruding in a direction perpendicular to the tapered portion (33).

Claims7

Dependent claims

An oil ring including an oil ring body, which is formed in a sprit ring shape having an opening, a web portion, and a pair of rail portions integrally formed with either axial end of the web portion, and also including a coil expander, which is mounted on a radially inner side of the oil ring body to push the oil ring body radially outward, the oil ring comprising:

a land formed, at an end portion of an outer periphery of each of the pair of rail portions, in a manner protruding radially outward from the pair of rail portions, the land including
a pair of axial portions facing opposite to each other in an axial direction,
a tapered portion having one axial end contiguous to one of the axial portions via a first curved portion, and
a protruding portion having one of axial ends contiguous to the tapered portion and the other axial end contiguous to the other axial portion via a second curved portion, the protruding portion protruding from the tapered portion in a direction perpendicular to the tapered portion.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/534,119Filed 1 Dec 2015
Priority: JP 2014-25101511 Dec 2014
Published: 25 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

F16J 9/06
Piston-rings , e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction: using separate springs or elastic elements…
F02F 5/00
Piston rings
F16J 9/062
Using metallic coiled or blade springs: coiled spring along the entire circumference
F16J 9/20
Details: rings with special cross-section ; Oil-scraping rings

Family

US 10,197,160 B2Related patent
US 2018/0023702 A1This patent

From the US filing history. Foreign family members aren’t listed.

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