Curved heat shrink tubing and methods of making the same

Patent metadata

Field	Value
Publication number	US-10625448-B2
Application number	US-201715832335-A
Country	US
Kind code	B2
Filing date	Dec 5, 2017
Priority date	Dec 5, 2017
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

Curved heat shrink tubing and methods of making the same are described herein. An example method includes inserting heat shrink tubing into a tube, curving the tube, and deforming the heat shrink tubing, inside of the tube, to have a curved shape along a length of the heat shrink tubing where a first length of the heat shrink tubing along an outer radius of the curved shape is longer than a second length of the heat shrink tubing along an inner radius of the curved shape.

First claim

What is claimed is:

1. A method comprising:
inserting heat shrink tubing into a tube;
curving the tube; and
deforming the heat shrink tubing, inside of the tube, to have a curved shape along a length of the heat shrink tubing where a first length of the heat shrink tubing along an outer radius of the curved shape is longer than a second length of the heat shrink tubing along an inner radius of the curved shape.

2. The method of claim 1 , wherein deforming the heat shrink tubing includes injecting pressurized fluid into an end of the heat shrink tubing to at least partially inflate the heat shrink tubing within the tube, thereby causing the heat shrink tubing to expand and deform within the tube to form the curved shape.

3. The method of claim 2 , further including, prior to inserting the heat shrink tubing into the tube, sealing one end of the heat shrink tubing.

4. The method of claim 1 , wherein curving the tube includes positioning the tube in a coiled shape.

5. The method of claim 4 , wherein the coiled shape includes multiple turns of the tube.

6. The method of claim 1 , wherein the heat shrink tubing has a substantially constant inner diameter.

7. The method of claim 1 , wherein an inner diameter of the tube is larger than an outer diameter of the heat shrink tubing.

8. The method of claim 1 , wherein the heat shrink tubing is inserted into the tube before curving the tube.

9. The method of claim 1 , further including:
straightening the tube; and
removing the heat shrink tubing from the tube.

10. The method of claim 1 , further including, prior to inserting the heat shrink tubing into the tube, cutting the heat shrink tubing from a stock of straight heat shrink tubing.

11. The method of claim 1 , wherein curving the tube includes coiling the tube into a first coil configuration, and deforming the heat shrink tubing includes deforming the heat shrink tubing inside of the tube while the tube is in the first coil configuration, and further including:
coiling the tube into a second coil configuration having a different radius of curvature than the first coil configuration; and
deforming the heat shrink tubing within the tube while the tube is in the second coil configuration.

12. The method of claim 1 , wherein the heat shrink tubing is constructed at least partially of fluorinated ethylene propylene (FEP).

Assignees

• Boeing Co

Inventors

• Sinclair James R

Classifications

• B29C57/04

  using mechanical means {(B29C57/025 takes precedence)} · CPC title

• F16L11/04 Primary

  made of rubber or flexible plastics · CPC title

• B29C63/34

  using tubular layers or sheathings · CPC title

• B29K2023/16

  EPM, i.e. ethylene-propylene copolymers; EPDM, i.e. ethylene-propylene-diene copolymers; EPT, i.e. ethylene-propylene terpolymers · CPC title

• B29K2105/02

  heat shrinkable {(B29K2995/0049 takes precedence)} · CPC title