# US 11,898,639 B2 · Seal with different compressions

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- Number: US 11,898,639 B2
- Document ID: US11898639B2
- Status: Granted
- Kind: B2
- Application number: 17/776,632
- Filed: 2020-11-24
- Published: 2022-12-22
- Granted: 2024-02-13
- Earliest claimed: 2019-11-26
- Assignees: Roxtec AB
- Applicants: Roxtec AB
- Inventors: Andreas Karlsson
- Web page: https://patentgrep.com/patent/US11898639B2

## CPC

- F16J 15/3284: characterised by their structure; Selection of materials
- F16L 5/08: by means of axial screws compressing a ring or sleeve
- H02G 3/22: Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
- A62C 2/065: {having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent}
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10)

## Abstract

A seal is formed of two identical seal halves (1). Each seal half (1) comprises a front fitting (4), a rear fitting (5), a compressible part placed between the front fitting (4) and the rear fitting (5) and a number of screws (7, 14, 18, 21). Said screws goes through openings in the front fitting (4), the rear fitting (5) and the compressible part. The compressible part comprises a first material (2), a second material (3) and a middle fitting (6) placed between first material (2) and the second material (3). The first material (2), the second material (3) and the middle fitting (6) have through openings for receiving the screws (7, 14, 18, 21).

## Claims

### Claim 1

A seal formed of two seal halves, wherein each seal half comprises a front fitting, a rear fitting, a compressible part placed between the front fitting and the rear fitting and a number of screws going through openings in the front fitting, the rear fitting and the compressible part, wherein the compressible part comprises a first material, a second material and a middle fitting placed between the first material and the second material and that the first material, the second material and the middle fitting have through openings for receiving the screws, and wherein the seal further comprises means to move the rear fitting and the middle fitting different axial lengths in relation to the front fitting when manipulating said means and that the first material and the second material have different properties.

### Claim 2 (depends on 1)

The seal of claim 1, wherein one of the first and second materials has a mainly fire protecting property, for instance being an intumescent material and wherein one of the first and second material has a mainly sealing property.

### Claim 3 (depends on 1)

The seal of claim 1, wherein the means to move the rear fitting and the middle fitting-different axial lengths comprises screws surrounded by sockets.

### Claim 4 (depends on 3)

The seal of claim 3, wherein each screw has a thread for cooperation with a thread of one of the openings of the rear fitting, wherein each socket has an outer thread for cooperation with a thread of one of the openings of the middle fitting-and wherein the screw and the socket can be rotated independently of each other.

### Claim 5 (depends on 3)

The seal of claim 3, wherein a screw head of the screw is received inside a socket head of the socket.

### Claim 6 (depends on 1)

The seal of claim 1, wherein the means to move the rear fitting and the middle fitting-different axial lengths comprises screws having a first thread and a second thread and wherein the first thread and the second thread of each screw have different pitches.

### Claim 7 (depends on 6)

The seal of claim 6, wherein the first thread of each screw is to cooperate with a thread of one of the openings of the middle fitting-and the second thread of each screw is to cooperate with a thread of one of the openings of the rear fitting.

### Claim 8 (depends on 6)

The seal of claim 6, wherein the first thread of each screw has a lower pitch than the second thread.

### Claim 9 (depends on 6)

The seal of claim 6, wherein the first thread of each screw has a higher pitch than the second thread.

### Claim 10 (depends on 1)

The seal of claim 1, wherein a number of peelable layers are placed on the inside of the first and second materials.