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US 2019/0154152 A1Published application
One-piece oil control ring
AssigneeFederal-Mogul Burscheid GmbH
InventorsRICHARD MITTLER, FABIAN RUCH
Life of this patent
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Abstract
A one-piece control ring with two stripping ridges and openings that extend from the outside of the ring to the inside is provided wherein the cross section of the ring body varies in the circumferential direction. This variation is achieved with internal grooves, the cross-sectional area of which decreases in the direction of the back of the ring, and with a variation of the depth of the groove lying between the ridges.
Claims18
A one-piece oil control ring with a ring body (1) that has a constant radial thickness (D) in the circumferential direction;
- wherein two ridges (2), which are axially spaced apart from one another by an external groove (4), are circumferentially arranged on an outer friction surface of the ring body in the circumferential direction;
- wherein openings (3) are arranged so as to extend radially from the bottom of the external groove to the inside of the ring body;
- wherein two internal grooves (5) are arranged on the inside of the ring body and circumferentially extend in the circumferential direction;
- wherein one of the internal grooves respectively begins in a region of each joint end;
- wherein the cross-sectional area of the internal grooves decreases from the ring joint in the direction of the back of the ring;
- wherein the depth (Ti) of the internal grooves (5) decreases from the ring joint in the direction of the back of the ring;
- and
- wherein the openings (3) are only arranged within an angular range of 0 to 135° and of 225° to 360° measured from the ring joint.
5 more elements
Dependencies are inferred from the claim text.