# US 11,028,894 B2 · Tubular vibration-damping device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,028,894 B2
- Document ID: US11028894B2
- Status: Granted
- Kind: B2
- Application number: 16/520,543
- Filed: 2019-07-24
- Published: 2019-11-14
- Granted: 2021-06-08
- Earliest claimed: 2018-03-30
- Assignees: Sumitomo Riko Company Limited
- Applicants: Sumitomo Riko Company Limited
- Inventors: Shingo Tanaka; Takashi Hayashi
- Web page: https://patentgrep.com/patent/US11028894B2

## CPC

- F16F 1/3828: {End stop features or buffering (F16F1/3807 takes precedence)}
- B60K 5/1208: {Resilient supports (B60K5/1241 - B60K5/1291 take precedence)}
- B60K 5/1225: {comprising resilient rings surrounding a part of the unit}
- F16F 1/3849: {Mounting brackets therefor, e.g. stamped steel brackets; Restraining links}
- B60K 5/1241: {Link-type support (B60K5/125, B60K5/1275 take precedence)}
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES

## Abstract

A tubular vibration-damping device including: an inner shaft member; an outer tube member; a main rubber elastic body elastically connecting the inner shaft member and the outer tube member, the main rubber elastic body being penetrated by a through hole in an axial direction; and a stopper rubber separated from the main rubber elastic body, the stopper rubber including an insert that is inserted in the through hole. A gap is provided in an axially middle portion of the insert, and the insert includes axially opposed faces that are opposed to each other in the axial direction with the gap in between.

## Claims

### Claim 1

A tubular vibration-damping device comprising:
an inner shaft member;
an outer tube member;
a main rubber elastic body elastically connecting the inner shaft member and the outer tube member, the main rubber elastic body being penetrated by a through hole in an axial direction; and
a stopper rubber separated from the main rubber elastic body, the stopper rubber including an insert that is inserted in the through hole, wherein
a gap is provided in an axially middle portion of the insert, and the insert includes axially opposed faces that are opposed to each other in the axial direction with the gap in between,
wherein the stopper rubber includes an attachment attached to an axial end of the inner shaft member.

### Claim 2 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein
the stopper rubber comprises a first stopper body inserted in the through hole from a first axial opening thereof and a second stopper body inserted in the through hole from a second axial opening thereof,
the first stopper body and the second stopper body include respective divided inserts that constitute the insert, and
the gap is provided axially between the divided inserts.

### Claim 3 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein the gap is provided by a partial divider that is formed in the axially middle portion of the insert of the stopper rubber.

### Claim 4 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein the stopper rubber includes a connector extending from the insert in the axial direction, and the insert and the attachment are connected by the connector, while the connector is thinner than the insert.

### Claim 5 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein in the through hole, the insert of the stopper rubber is overlapped on an inner circumferential surface on a side of the inner shaft member.

### Claim 6 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein a rubber hardness of the stopper rubber is smaller than that of the main rubber elastic body.

### Claim 7 (depends on 1)

The tubular vibration-damping device according to claim 1, wherein the insert of the stopper rubber is shorter than both of the inner shaft member and the outer tube member in the axial direction.