# US 12,595,857 B2 · Assembly for preventing a backflow

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- Number: US 12,595,857 B2
- Document ID: US12595857B2
- Status: Granted
- Kind: B2
- Application number: 18/710,683
- Filed: 2022-11-17
- Published: 2025-02-06
- Granted: 2026-04-07
- Earliest claimed: 2021-11-17
- Assignees: KSB SE & Co. KGaA
- Applicants: KSB SE & Co. KGaA
- Inventors: Gregor Rauch; Dieter Hanewald
- Web page: https://patentgrep.com/patent/US12595857B2

## CPC

- F16K 15/04: shaped as balls
- F16K 27/0209: {Check valves or pivoted valves}
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}

## Abstract

An assembly that prevents a backflow includes an element. The element releases a flow in a flow direction and which prevents a flow opposite to the flow direction. The element is arranged in a chamber which has stops. The chamber is formed by a single-piece wall. The element is integrated into the chamber in a form-fitting manner.

## Claims

### Claim 1

An assembly that prevents a backflow, comprising:
an element which releases a flow in a flow direction and which prevents a flow opposite to the flow direction, wherein
the element is arranged in a chamber, which has stops,
the chamber is formed by a single-piece wall,
the element is integrated into the chamber in a form-fitting manner,
the plurality of chambers are arranged in or on a channel through which flow occurs, and
the channel has elements configured to vary the pressure.

### Claim 2 (depends on 1)

The assembly as claimed in claim 1, wherein the wall is formed integrally with the stops.

### Claim 3 (depends on 2)

The assembly as claimed in claim 2, wherein the assembly comprises a plurality of chambers.

### Claim 4 (depends on 3)

The assembly as claimed in claim 3, wherein the plurality of chambers of the assembly are structurally arranged to form a parallel through flow.

### Claim 5 (depends on 4)

The assembly as claimed in claim 4, wherein the plurality of chambers are symmetrically positioned.

### Claim 6 (depends on 1)

The assembly as claimed in claim 1, wherein the element is formed as a ball.

### Claim 7 (depends on 6)

The assembly as claimed in claim 6, wherein the chamber has a stop for the element in the flow direction.

### Claim 8 (depends on 7)

The assembly as claimed in claim 7, wherein the stop in the flow direction has centering to ensure low-flow positioning of the element in a state in which there is full through flow.

### Claim 9 (depends on 8)

The assembly as claimed in claim 8, wherein the stop has strut-type elements.

### Claim 10 (depends on 9)

The assembly as claimed in claim 9, wherein the chamber has a cavity.

### Claim 11 (depends on 10)

The assembly as claimed in claim 10, wherein the assembly is designed for generative manufacture.

### Claim 12 (depends on 11)

The assembly as claimed in claim 11, wherein the element and the single-piece wall having the stop have a metallic surface, the average roughness Ra of which is less than 6.4 μm.

### Claim 13 (depends on 12)

The assembly as claimed in claim 12, wherein the average roughness Ra is less than 3.2 μm.

### Claim 14 (depends on 12)

The assembly as claimed in claim 12, wherein the average roughness Ra is less than 1.6 μm.

### Claim 15 (depends on 1)

A method for producing the assembly as claimed in claim 1, wherein the element is produced in a chamber simultaneously with the single-piece wall by selective action of radiation on a buildup material.

### Claim 16 (depends on 15)

The method as claimed in claim 15, wherein the element and/or the wall have the stop are electropolished.

### Claim 17 (depends on 1)

A method comprising:
using the assembly as claimed in claim 1 as a restrictor module and/or as a flow divider in a system through which flow occurs.