# US 12,595,850 B2 · Seal member for rolling bearing

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- Number: US 12,595,850 B2
- Document ID: US12595850B2
- Status: Granted
- Kind: B2
- Application number: 18/699,467
- Filed: 2022-10-24
- Published: 2024-12-12
- Granted: 2026-04-07
- Earliest claimed: 2021-10-26
- Assignees: Nakanishi Metal Works Co., Ltd.
- Applicants: Nakanishi Metal Works Co., Ltd.
- Inventors: Yasuhiko Kojima; Machi Sadamori
- Web page: https://patentgrep.com/patent/US12595850B2

## CPC

- F16J 15/12: with metal reinforcement or covering
- F16J 15/3284: characterised by their structure; Selection of materials
- F16C 33/7816: {Details of the sealing or parts thereof, e.g. geometry, material}
- F16C 33/80: Labyrinth sealings {(F16C33/761 takes precedence)}
- F16C 33/784: {mounted to a groove in the inner surface of the outer race and extending toward the inner race}
- F16C 2223/30: Coating surfaces
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

Provided is a seal member for rolling bearing, which includes a seal body, and a coating layer that contains an antiozonant and silicone oil, and is formed on a surface of the seal body. The seal member for rolling bearing can be produced by applying on a surface of the seal body, a coating composition containing 10 to 30% by weight of an antiozonant and 3 to 10% by weight of silicone oil, the antiozonant and the silicone oil being dispersed in a solvent.

## Claims

### Claim 1

A seal member for a rolling bearing, the seal member comprising:
a seal body; and
a coating layer that contains an antiozonant and silicone oil, and is formed on a surface of the seal body,
wherein the coating layer is comprised of a predetermined ratio of the antiozonant and the silicone oil, and
wherein in the coating layer, a content of the antiozonant is 50 to 92% by weight and a content of the silicone oil is 8 to 50% by weight.

### Claim 2 (depends on 1)

The seal member for a rolling bearing according to claim 1, wherein the seal body contains a dienic rubber composition.

### Claim 3 (depends on 1)

The seal member for a rolling bearing according to claim 1, wherein the coating layer is a liquid having predetermined viscosity.

### Claim 4

A method for producing a seal member for a rolling bearing, wherein the seal member comprises a seal body; and a coating layer that contains an antizoonant and silicone oil, and is formed on a surface of the seal body, wherein the coating layer is comprised of a predetermined ratio of the antiozonant and the silicone oil, and wherein in the coating layer, a content of the antiozonant is 50 to 92% by weight and a content of the silicone oil is 8 to 50% by weight,
the method, comprising:
a step of applying, to the surface of the seal body, a coating composition containing 10 to 30% by weight of the antiozonant and 3 to 10% by weight of the silicone oil, the antiozonant and the silicone oil being dispersed in a solvent.

### Claim 5 (depends on 4)

The method for producing a seal member for rolling bearing according to claim 4, the method further comprising:
a step of vaporizing the solvent in the coating composition to form the coating layer.

### Claim 6 (depends on 4)

The method for producing a seal member for rolling bearing according to claim 4, wherein
the seal body includes a dienic rubber composition.