# US 11,994,217 B2 · Sliding component

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- Number: US 11,994,217 B2
- Document ID: US11994217B2
- Status: Granted
- Kind: B2
- Application number: 17/908,700
- Filed: 2020-04-07
- Published: 2023-05-25
- Granted: 2024-05-28
- Earliest claimed: 2020-04-07
- Assignees: Eagle Industry Co., Ltd.
- Applicants: Eagle Industry Co., Ltd.
- Inventors: Hiroshi Suzuki; Yuichiro Tokunaga
- Web page: https://patentgrep.com/patent/US11994217B2

## CPC

- F16J 15/3412: {with cavities (F16J15/3424 takes precedence)}
- F16J 15/3424: {with microcavities}
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS

## Abstract

A sliding component includes a pair of the sliding members being slidable relative to each other on sliding surfaces of the sliding members. One of the sliding surfaces includes a dimple group in which a plurality of dimples is arranged and each of the dimples has an opening portion whose shape has a long axis and a short axis orthogonal to the long axis. The dimple group includes a clockwise dimple group in which the dimples are arranged in a clockwise direction from an inner diameter side to an outer diameter side of the sliding surface and a counterclockwise dimple group in which the dimples are arranged in a counterclockwise direction from the inner diameter side to the outer diameter side of the one of the sliding surfaces.

## Claims

### Claim 1

A sliding component comprising a pair of sliding members being slidable relative to each other on sliding surfaces of the sliding members,
wherein at least one of the sliding surfaces includes a dimple group in which a plurality of dimples is arranged, each of the dimples having an opening portion a shape of which has a long axis and a short axis orthogonal to the long axis,
the dimple group includes:
a clockwise dimple group in which the dimples are arranged in a clockwise direction from an inner diameter side to an outer diameter side of the one of the sliding surfaces; and
a counterclockwise dimple group in which the dimples are arranged in a counterclockwise direction from the inner diameter side to the outer diameter side of the one of the sliding surfaces,
the clockwise dimple group includes a first dimple group in which the long axes of the dimples are aligned, and the counterclockwise dimple group includes a second dimple group in which the long axes of the dimples are aligned, and
the clockwise dimple group includes a third dimple group in which the short axes of the dimples constituting the second dimple group are aligned, and the counterclockwise dimple group includes a fourth dimple group in which the short axes of the dimples constituting the first dimple group are aligned.

### Claim 2 (depends on 1)

The sliding component according to claim 1, wherein the dimples constituting the first dimple group and the dimples constituting the second dimple group have different depths.

### Claim 3 (depends on 1)

The sliding component according to claim 1, wherein the first dimple group forms a curve that is convex outward in a radial direction of the sliding surface.

### Claim 4 (depends on 1)

The sliding component according to claim 1, wherein the second dimple group forms a curve that is convex outward in the radial direction of the sliding surface.

### Claim 5 (depends on 1)

The sliding component according to claim 1, wherein the dimple group is formed by arranging the long axis or the short axis of the dimple along a predetermined curve.

### Claim 6 (depends on 5)

The sliding component according to claim 5, wherein the predetermined curve is formed in a spiral shape.

### Claim 7 (depends on 1)

The sliding component according to claim 1, wherein the shape of each of the opening portions of the dimples is an ellipse.

### Claim 8 (depends on 1)

The sliding component according to claim 1, wherein the first dimple group forms a curve that is convex in a sliding direction of the sliding surfaces.

### Claim 9 (depends on 1)

The sliding component according to claim 1, wherein the second dimple group forms a curve that is convex in a sliding direction of the sliding surfaces.