OIL SCRAPER PISTON RING

Abstract

An oil scraper piston ring which includes a running face region formed by at least two running face lands, an inner circumferential surface, and upper and lower flank surfaces extending between the running face region and the inner circumferential surface, also includes a joint and oil passage openings extending radially between the running face lands from the outside to the inside, optionally operatively connected to a spring element, wherein the joint is formed by at least two spaced slotted regions having a predefinable shape and dimensions, which are not directly connected to one another, so that each slotted region formed by a slot extends, proceeding from the associated flank surface, at least into one oil passage opening provided between at least two running face lands.

Claims

1. An oil scraper piston ring, comprising a running face region formed by at least two running face lands which are parallel to one another, an inner circumferential surface, and upper and lower flank surfaces extending between the running face region and the inner circumferential surface, and further comprising a joint and oil passage openings extending radially from a surface of the oil scraper piston ring between the running face lands to an interior of the oil scraper piston ring, wherein the joint is formed by at least two spaced slotted regions which are not directly connected to one another, so that each slotted region formed by a respective slot extends from a respective one of the flank surfaces at least into one of the oil passage openings provided between the at least two running face lands.

2. The oil scraper piston ring according to claim 1, wherein the slotted regions extend parallel to one another.

3. The oil scraper piston ring according to claim 1, wherein the slotted regions extend at an angle of 90 with respect to the flank surfaces.

4. The oil scraper piston ring according to claim 1, wherein the slotted regions extend at an angle <90 with respect to the flank surfaces.

5. The oil scraper piston ring according to claim 1, wherein the slotted regions extend at respective different angles with respect to the flank surfaces.

6. The oil scraper piston ring according to claim 1 made of cast iron or steel.

7. (canceled)

8. (canceled)

9. The oil scraper piston ring according to claim 1, wherein axial length of the slotted region is not greater than approximately 50% of axial height of the oil scraper piston ring.

10. The oil scraper piston ring according to claim 1, wherein the slotted regions extend at an angle of 45 with respect to the flank surfaces.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The subject matter of the invention is shown in the drawings based on an exemplary embodiment and is described as follows. In the drawings:

[0025] FIGS. 1 to 3 show different designs of oil-tight joint regions on an oil scraper piston ring.

DETAILED DESCRIPTION OF THE INVENTION

[0026] FIG. 1 shows an oil scraper piston ring 1, comprising a running face region 2 in the present example, formed by two running face lands 3, 4. An upper flank surface 5 and a lower flank surface 6 are apparent, as are oil passage openings 7 extending axially between the running face lands 3, 4. Moreover, a joint 8 is apparent.

[0027] According to FIG. 1, the joint 8 is formed by a slotted region formed of two slots 9, 10, wherein the slots 9, 10 in the present example, proceeding from the respective flank surface 5, 6, extend axially in the direction of an individual oil passage opening 7, in a manner parallel to one another n overlapping region, which forms an oil-tight joint, is thus generated between the running face lands 3, 4 by the slots 9, 10 forming the slotted region.

[0028] FIGS. 2 and 3 show alternative embodiments of the joint 8 according to FIG. 1.

[0029] According to FIG. 2, two slots 11, 12, which likewise extend parallel to one another, are provided as slotted regions, which, however, deviating from FIG. 1, extend at a predefinable angle <90, proceeding from the respective flank surface 5, 6, in the direction of the associated oil passage opening 7.

[0030] FIG. 3 shows a further alternative.

[0031] In FIG. 3, deviating from FIG. 2, the slots 13, 14 forming the joint 8 extend at differing angles of inclination , proceeding from the respective flank surface 5, 6, in the direction of the associated oil passage opening 7.