# US 10,480,652 B2 · Sealing device

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

- Number: US 10,480,652 B2
- Document ID: US10480652B2
- Status: Granted
- Kind: B2
- Application number: 15/557,501
- Filed: 2016-03-02
- Published: 2018-02-22
- Granted: 2019-11-19
- Earliest claimed: 2015-03-18
- Assignees: Hammelmann GmbH
- Applicants: Hammelmann GmbH
- Inventors: René Nölle; Martin Oberscheidt; Gerald Schubring
- Web page: https://patentgrep.com/patent/US10480652B2

## CPC

- F16J 15/006: {with division of the pressure (F16J15/44 takes precedence)}
- F16J 15/002: {comprising at least two sealings in succession (F16J15/162, F16J15/40 take precedence)}
- F16J 15/406: {by at least one pump}
- F16J 15/441: {with floating ring}
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS

## Abstract

A sealing device comprising an intermediate bushing, which is located between an outer sleeve and an inner member mounted therein so as to be movable relative thereto and which forms a gap seal, is designed in such a way that chambers that can be filled with a pressurized fluid are provided between the intermediate bushing and the adjacent outer sleeve.

## Claims

### Claim 1

A sealing device, comprising an intermediate bushing arranged concentrically between an outer sleeve and an inner body and movable relative thereto, the intermediate bushing and the inner body defining a single annular gap therebetween, the bushing cooperating with the outer sleeve the inner body, and a plurality of seals disposed between the outer sleeve and the intermediate bushing to define a plurality of chambers which can be filled with a pressurized liquid, the annular gap simultaneously in fluid communication with all of the plurality of chambers.

### Claim 2 (depends on 1)

A sealing device according to claim 1, wherein the intermediate bushing comprises radially oriented through-openings which open into the chambers.

### Claim 3 (depends on 1)

A sealing device according to claim 1, wherein each chamber is assigned at least one through-opening.

### Claim 4 (depends on 1)

A sealing device according to claim 1, wherein each chamber is designed as a circumferential annular space.

### Claim 5 (depends on 1)

A sealing device according to claim 1, wherein several chambers are provided which are distributed over the circumference.

### Claim 6 (depends on 1)

A sealing device according to claim 1, wherein the outer sleeve is rotatable or axially displaceable relative to the inner body.

### Claim 7 (depends on 1)

A sealing device according to claim 1, wherein the seal comprises a sealing ring, which is supported on the inner wall of the outer sleeve and on the intermediate bushing.

### Claim 8 (depends on 7)

A sealing device according to claim 7, wherein the sealing ring is held in a holder.

### Claim 9 (depends on 1)

A sealing device according to claim 1, further comprising rings resting against the inner wall of the outer sleeve thereby defining the chambers.

### Claim 10 (depends on 1)

A sealing device according to claim 1, the intermediate bushing defining groove-like indentations defining the chambers, which indentations are delimited in the axial direction of the intermediate bushing by the integrally formed holders.

### Claim 11 (depends on 1)

A sealing device according to claim 1 wherein the chambers are connected to a pump operable to supply a pressurized fluid thereto.