Stent with coiled spring

Patent metadata

Field	Value
Publication number	US-11079058-B2
Application number	US-202016786193-A
Country	US
Kind code	B2
Filing date	Feb 10, 2020
Priority date	Mar 15, 2019
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

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.

First claim

That which is claimed is:

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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

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

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.

10. 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.

11. 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.

Assignees

• Mueller Int Llc

Inventors

• Furcoiu Aurelian Ioan

Classifications

• F16L55/18

  Appliances for use in repairing pipes (F16L55/10 takes precedence) · CPC title

• F16L11/15

  corrugated (F16L11/16 takes precedence) · CPC title

• F16L55/163 Primary

  a ring, a band or a sleeve being pressed against the inner surface of the pipe · CPC title