# US 11,079,058 B2 · Stent with coiled spring

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- Number: US 11,079,058 B2
- Document ID: US11079058B2
- Status: Granted
- Kind: B2
- Application number: 16/786,193
- Filed: 2020-02-10
- Published: 2020-09-17
- Granted: 2021-08-03
- Earliest claimed: 2019-03-15
- Assignees: Mueller International, LLC
- Applicants: Mueller International, LLC
- Inventors: Aurelian Ioan Furcoiu
- Web page: https://patentgrep.com/patent/US11079058B2

## CPC

- F16L 55/163: a ring, a band or a sleeve being pressed against the inner surface of the pipe
- F16L 55/18: Appliances for use in repairing pipes (F16L55/10 takes precedence)
- F16L 11/15: corrugated (F16L11/16 takes precedence)
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL

## Abstract

Example aspects of a stent for repairing a pipe and a method for repairing a pipe are disclosed. The stent for repairing a pipe can comprise a coiled extension stent spring comprising a plurality of spring coils and a seal assembled with the coiled extension stent spring and configured to engage an inner surface of a pipe, wherein the stent is configurable in an extended configuration and a contracted configuration, the coiled stent spring biasing the stent to the contracted configuration.

## Claims

### Claim 1

A stent for repairing a pipe comprising:
a coiled extension stent spring comprising a plurality of spring coils; and
a seal assembled with the coiled extension stent spring and configured to engage an inner surface of a pipe, the seal defining an elongated tubular sleeve encasing each of the plurality of spring coils, wherein the stent is configurable in an extended configuration and a contracted configuration, the coiled extension stent spring biasing the stent to the contracted configuration.

### Claim 2 (depends on 1)

The stent for repairing a pipe of claim 1, wherein:
the coiled extension stent spring defines a first end and an opposing second end;
the plurality of spring coils extend between the first end and the second end; and
a pulling structure is oriented at each of the first end and second end.

### Claim 3 (depends on 2)

The stent for repairing a pipe of claim 2, wherein the pulling structure at the first end defines a first hook and the pulling structure at the second end defines a second hook.

### Claim 4 (depends on 1)

The stent for repairing a pipe of claim 1, wherein:
the stent defines a contracted stent diameter in the contracted configuration;
the stent defines an extended stent diameter in the extended configuration; and
the contracted stent diameter is greater than the extended stent diameter.

### Claim 5 (depends on 1)

The stent for repairing a pipe of claim 1, wherein:
the coiled extension stent spring defines a diameter and a length;
the diameter of the coiled extension stent spring is greater in the contracted configuration than in the extended configuration; and
the length of the coiled extension stent spring is lesser in the contracted configuration than in the extended configuration.

### Claim 6 (depends on 1)

The stent for repairing a pipe of claim 1, wherein:
the coiled extension stent spring defines a first end and an opposing second end;
the coiled extension stent spring further defines an outer surface and an opposite inner surface;
the inner surface defines a void extending from the first end to the second end; and
a central axis extends through a center of the void.

### Claim 7 (depends on 6)

The stent for repairing a pipe of claim 6, wherein:
the seal defines a hollow cylindrical structure;
the hollow cylindrical structure wraps around a circumference of the coiled extension stent spring; and
an inner surface of the seal engages an outer surface of the coiled extension stent spring.

### Claim 8 (depends on 7)

The stent for repairing a pipe of claim 7, wherein the seal is concentric to the central axis.

### Claim 9

A stent for repairing a pipe comprising:
a coiled wrapped stent spring comprising a plurality of spring coils, wherein the spring coils define a plurality of closed coil ends and a plurality of open coil channels; and
a seal assembled with the coiled wrapped stent spring and configured to engage an inner surface of a pipe, wherein the stent is configurable in an compressed configuration and an expanded configuration, the coiled wrapped stent spring biasing the stent to the expanded configuration.

### Claim 10 (depends on 9)

The stent for repairing a pipe of claim 9, wherein each of the closed coil ends is oriented in a facing relationship with a corresponding one of the open coil channels.

### Claim 11 (depends on 10)

The stent for repairing a pipe of claim 10, wherein:
in the expanded configuration, each of the closed coil ends is biased away from the corresponding one of the open coil channels by a spring force of the coiled wrapped stent spring; and
in the compressed configuration, each of the closed coil ends is moved towards the corresponding one of the open coil channels by a compression force.