# US 7,607,353 B2 · Sealing device for sealing a pressure measuring cell housing, pressure measuring cell device and pressure measuring device comprising the same

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- Number: US 7,607,353 B2
- Document ID: US7607353B2
- Status: Granted
- Kind: B2
- Application number: 12/003,821
- Filed: 2008-01-02
- Published: 2008-07-03
- Granted: 2009-10-27
- Earliest claimed: 2007-01-03
- Assignees: VEGA Grieshaber KG
- Inventors: Thomas Kopp
- Web page: https://patentgrep.com/patent/US7607353B2

## CPC

- G01L 19/147: {Details about the mounting of the sensor to support or covering means}
- G01L 19/0084: {to the outside of the housing (other details about the housing see G01L19/14)}
- G01L 19/148: {Details about the circuit board integration, e.g. integrated with the diaphragm surface or encapsulation}
- G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G)

## Abstract

The invention relates particularly to a sealing device (8) for sealing a pressure measuring cell housing (3), wherein the sealing device (8) comprises a pressure compensation opening (23; 23′) for a pressure compensation line (21; 21′; 21″, 20) of a pressure measuring cell (4) received in the pressure measuring cell housing (3), wherein the sealing device (8) is made of a dimensionally stable hard part (18; 18*; 18′) having at least one elastic soft part (19; 19°; 19*; 19′), which is disposed in the region of the pressure compensation opening (23; 23′) on the hard part (18; 18*; 18′).

## Claims

### Claim 1

A sealing device (8) for sealing a pressure measuring cell housing (3), the sealing device (8) comprising a pressure compensation opening (23; 23′) for a pressure compensation line (21; 21′; 21″, 20) of a pressure measuring cell (4) received in the pressure measuring cell housing (3), characterized in that the sealing device (8) is made of a dimensionally stable hard part (18; 18*; 18′) having at least one elastic soft part (19; 19°; 19*; 19′), which is disposed, particularly fastened, in the region of the pressure compensation opening (23; 23′) on the hard part (18; 18*; 18′).

### Claim 2 (depends on 1)

The sealing device according to claim 1, wherein the hard part (18; 18*; 18′) is made of a thermoplastic resin.

### Claim 3 (depends on 1)

The sealing device according to claim 1, wherein the soft part (19; 19°; 19*; 19′) is made of a thermoplastic elastomer.

### Claim 4 (depends on 1)

A sealing device according to claim 1, wherein the hard part (18; 18*; 18′) and the at least one soft part (19; 19°; 19*; 19′) are produced by means of a two-component injection molding method.

### Claim 5 (depends on 1)

A sealing device according to claim 1, wherein a recess is provided in the hard part (18; 18*) in the region of the pressure compensation opening (23) on at least one side in order to insert or introduce a pressure compensation line (21) and/or a soft part (19).

### Claim 6 (depends on 1)

A sealing device according to claim 1, wherein in the region of the pressure compensation opening (23) an elevation, particularly a projecting tubular section of the hard part (18; 18*) is formed.

### Claim 7 (depends on 1)

A sealing device according to claim 1, wherein the soft part (19′) is configured to extend through the pressure compensation opening (23′) penetrating the hard part (18′).

### Claim 8 (depends on 1)

A sealing device according to claim 1, wherein the soft part (19°) is disposed between the hard part (18) and an opening in the pressure measuring cell (4) or a pressure compensation line (20) such that it encompasses the pressure compensation opening (23).

### Claim 9 (depends on 8)

The sealing device according to claim 8, wherein the soft part (19°) is configured to extend from the hard part (18) in the direction of the pressure measuring cell (4) up to the pressure measuring cell (4).

### Claim 10 (depends on 1)

A pressure measuring cell device comprising a sealing device (8) according to claim 1 and comprising a pressure measuring cell (4), wherein between the sealing device (8) and the pressure measuring cell (4) a free space (7) having at least one electronic component (9) is formed.

### Claim 11 (depends on 10)

The pressure measuring cell device according to claim 10, wherein the soft part (19°) of the sealing device (8) rests directly against the pressure measuring cell (4) such that it tightly seals an opening of the pressure measuring cell (4).

### Claim 12 (depends on 10)

The pressure measuring cell according to claim 10, wherein the soft part (19) is configured such that it seals a pressure compensation line (20) of the pressure measuring cell (4), particularly in a tightly sealed manner.

### Claim 13 (depends on 10)

A pressure measuring cell device according to claim 10, wherein the soft part (19; 19′) encompasses a pressure compensation line (21; 21′) in a tightly sealing manner, wherein the pressure compensation line (21; 21′) on a side of the sealing device (8) facing away from the pressure measuring cell (4) leads through a housing (2) of a pressure measuring device.

### Claim 14 (depends on 10)

A pressure measuring device (1) comprising a pressure measuring cell device according to claim 10 at the front of a housing (2), wherein a pressure compensation line (21; 21′) extends through the housing (2) aligned with the pressure compensation opening (23; 23′), wherein the pressure compensation line (21; 21′) is sealed by the soft part (19; 19′) in relation to the housing interior of the housing (2), and wherein the housing interior is potted with a casting material (15).

### Claim 15 (depends on 1)

A method for producing a sealing device according to claim 1, wherein the hard part (18; 18*; 18′) and the at least one soft part (19; 19°; 19*; 19′) are produced by means of a two-component injection molding method.