# US 2017/0254684 A1 · Tube For Measuring The Differential Pressure Of A Medium Flowing Through The Tube

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- Number: US 2017/0254684 A1
- Document ID: US20170254684A1
- Status: Published application
- Kind: A1
- Application number: 15/507,837
- Filed: 2015-09-09
- Published: 2017-09-07
- Earliest claimed: 2014-09-12
- Assignees: Systec Controls Mess Und Regeltechnik Gmbh
- Applicants: Systec Controls Mess- Und Regeltechnik GmbH
- Inventors: OLIVER BETZ
- Web page: https://patentgrep.com/patent/US20170254684A1

## CPC

- G01F 1/44: Venturi tubes
- G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME

## Abstract

A tube measures the differential pressure of a medium flowing through the tube. An insertion element for a tube as well as a method for assembling the insertion element and the tube are also provided.

## Claims

### Claim at position 1

1-13. (canceled)

### Claim 14

A tube for measuring the differential pressure of a medium flowing through the tube, the tube comprising:
an inner profile of the tube;
a tubular carrier having a wall with an inner wall surface; and
a tubular insertion element disposed on said inner wall surface of said tubular carrier, said tubular insertion element forming at least partial regions of said inner profile.

### Claim 15 (depends on 14)

The tube according to claim 14, which further comprises two channels penetrating through said wall of said tubular carrier, said two channels being disposed one behind the other in a direction of flow of the medium.

### Claim 16 (depends on 15)

The tube according to claim 15, wherein:
said tubular insertion element has an interior carrying a flow of the medium, an outer surface, and a continuous groove running around said outer surface of said tubular insertion element;
said continuous groove is disposed between said tubular insertion element and said inner wall surface of said tubular carrier;
said continuous groove is connected with said interior of said tubular insertion element by a plurality of boreholes provided in said tubular insertion element; and
said continuous groove is connected with one of said two channels.

### Claim 17 (depends on 16)

The tube according to claim 16, wherein said continuous groove has a shape of a circular arc.

### Claim 18 (depends on 17)

The tube according to claim 17, wherein said circular arc formed by said continuous groove has two ends and is downwardly aligned in a vicinity of said two ends.

### Claim 19 (depends on 16)

The tube according to claim 16, wherein said tubular insertion element is sealed against said tubular carrier at least one of before or after said continuous groove in said direction of flow.

### Claim 20 (depends on 19)

The tube according to claim 19, which further comprises gaskets running around said outer surface of said tubular insertion element on both sides of said continuous groove.

### Claim 21 (depends on 19)

The tube according to claim 19, which further comprises an integral connection between said tubular carrier and said insertion element establishing a tightness of said continuous groove.

### Claim 22 (depends on 16)

The tube according to claim 16, wherein said continuous groove is formed in said outer wall surface of said tubular insertion element.

### Claim 23 (depends on 16)

The tube according to claim 16, wherein:
said continuous groove of said tubular insertion element is a first continuous groove;
said tubular insertion element includes a second continuous groove;
said two channels penetrating through said wall of said tubular carrier are first and second channels;
said first groove is joined with said first channel; and
said second groove is joined with said second channel.

### Claim 24 (depends on 14)

The tube according to claim 14, wherein said inner wall surface of said tubular carrier has a partial region forming a seat for said tubular insertion element.

### Claim 25

A tubular insertion element to be disposed on an inner wall surface of a tubular carrier, the tubular insertion element comprising:
at least partial regions of an inner profile of a tube for measuring a differential pressure of a medium flowing through the tube.

### Claim 26

A method for fabricating a tube for measuring the differential pressure of a medium flowing through the tube, the method comprising the following steps:
aligning a tubular insertion element coaxially with a tubular carrier; and
then introducing the insertion element into the tubular carrier to place the tubular insertion element on an inner wall surface of the tubular carrier and to form at least partial regions of an inner profile of the tube inside the tubular insertion element.