# US 5,346,189 A · Hydraulically damped rubber bearing

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- Number: US 5,346,189 A
- Document ID: US5346189A
- Status: Granted
- Kind: A
- Application number: 08/157,594
- Filed: 1993-11-24
- Granted: 1994-09-13
- Earliest claimed: 1991-08-13
- Assignees: Firma Carl Freudenberg
- Inventors: Axel Rudolph
- Web page: https://patentgrep.com/patent/US5346189A

## CPC

- F16F 13/106: {Design of constituent elastomeric parts, e.g. decoupling valve elements, or of immediate abutments therefor, e.g. cages}
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION

## Abstract

In a hydraulically damped rubber bearing, a supported component is attached to a supporting component by an element made of resilient material. The supported and supporting components enclose an activating chamber occupied by a fluid. The activating chamber is separated from a compensation chamber by a partition. The partition accommodates at least one port. At least some of the partition is flexible. The compensation chamber is sealed off from outside by a diaphragm secured to the supporting component. The flexible section of the wall and the diaphragm are molded in one piece. The molding is fastened to the partition essentially fluid-tight in the zone between the flexible section and the diaphragm.

## Claims

### Claim 1

In a hydraulically damped rubber bearing with a supported component attached to a supporting component by an element made of a resilient material, wherein the supported and supporting components enclose an activating chamber occupied by a fluid, the activating chamber is separated from a compensation chamber by a partition, the partition accommodates at least one port, a section of the partition is flexible, and the compensation chamber is sealed off from outside by a diaphragm secured to the supporting component, the improvement wherein both the flexible section of the partition and the diaphragm are formed by a single one piece molding; and wherein the molding has an undercut elevation and snaps into a perforation through a substantially rigid section of the partition.

### Claim 2 (depends on 1)

Rubber bearing as defined in claim 1, wherein the elevation fits loosely in the perforation with play.

### Claim 3 (depends on 1)

Rubber bearing as defined in claim 1, wherein the elevation has a valve tongue integrated into it and essentially sealing off one side of a secondary perforation in the substantially rigid section of the partition.

### Claim 4 (depends on 3)

Rubber bearing as defined in claim 3, wherein the valve tongue snaps into the secondary perforation.

### Claim 5 (depends on 3)

Rubber bearing as defined in claim 3, wherein the valve tongue has a tertiary perforation in the vicinity of the secondary perforation with a cross-section narrower than that of the secondary perforation.

### Claim 6 (depends on 3)

Rubber bearing as defined in claim 3, wherein the secondary perforation is a slit or incision, with no material removed.