Granted Patent B2

US 12,305,792 · App. 16/931,571 · Granted May 20, 2025

Inventors: Donald Bradley Campbell (Gallatin, TN); Jordan Strunk (Portland, TN)

Assignee: Titeflex Corporation

F16L9/147F16L9/04F16L9/121F16L9/123F16L59/07F25B41/40

Abstract

Claims (123)

1. A composite refrigeration line set comprising:

a suction line; and

a return line;

characterized in that one or more of the suction line and the return line are a composite refrigeration line tube consisting of:

an inner plastic tube;

a first adhesive layer circumferentially surrounding the inner plastic tube;

an aluminum layer circumferentially surrounding the first adhesive layer and the inner plastic tube; and

a second adhesive layer circumferentially surrounding the aluminum layer; and

an outer plastic layer circumferentially surrounding the second adhesive layer and the aluminum layer;

wherein:

the aluminum layer is an alloy selected from the group consisting of:

AL 3005, AL 3105, AL 6061, and AL 8006;

the alloy has less than 0.8% magnesium by mass;

the aluminum layer does not include a corrosion-inhibiting protective coating; and

the aluminum layer has a thickness within a corresponding range from the following table

Pipe Size (in)

AL 3005-O (in)

AL 3105-O (in)

1/4″

0.014-0.02 

0.016-0.022

3/8″

0.018-0.026

0.022-0.03 

1/2″

0.026-0.035

0.031-0.041

5/8″

0.033-0.045

0.039-0.051

3/4″

0.041-0.053

0.049-0.059

7/8″

0.045-0.061

0.055-0.067

1 1/8″

0.061-0.077

0.071-0.087

Pipe Size (in)

AL 6061-O (in)

AL 8006-O (in)

1/4″

0.014-0.022

0.018-0.024

3/8″

 0.02-0.028

0.024-0.033

1/2″

 0.03-0.037

0.033-0.043

5/8″

0.037-0.047

0.041-0.055

3/4″

0.047-0.057

0.051-0.065

7/8″

0.051-0.063

0.059-0.073

1 1/8″

0.067-0.081

 0.075-0.093.

2. A refrigeration system comprising:

the composite line set according to claim 1 .

3. A composite refrigeration line set comprising:

a suction line; and

a return line;

characterized in that one or more of the suction line and the return line are a composite refrigeration line tube consisting of:

an inner plastic tube;

a first adhesive layer circumferentially surrounding the inner plastic tube;

an aluminum layer circumferentially surrounding the first adhesive layer and the inner plastic tube; and

a second adhesive layer circumferentially surrounding the aluminum layer; and

an outer plastic layer circumferentially surrounding the second adhesive layer and the aluminum layer;

wherein:

the aluminum layer is an alloy having between 0.15% and 0.8% magnesium by mass; and

the aluminum layer does not include a corrosion-inhibiting protective coating.

4. The composite refrigeration line set of claim 3 , wherein the alloy is selected from the group consisting of: AL 3005 and AL 3105.

5. The composite refrigeration line set of claim 3 , wherein:

the alloy is selected from the group consisting of: AL 3005, AL 3105, and AL 6061; and

the aluminum layer has a thickness within a corresponding range from the following table

Pipe Size (in)

AL 3005-O (in)

AL 3105-O (in)

1/4″

0.014-0.02 

0.016-0.022

3/8″

0.018-0.026

0.022-0.03 

1/2″

0.026-0.035

0.031-0.041

5/8″

0.033-0.045

0.039-0.051

3/4″

0.041-0.053

0.049-0.059

7/8″

0.045-0.061

0.055-0.067

1 1/8″

0.061-0.077

0.071-0.087

Pipe Size (in)

AL 6061-O (in)

1/4″

0.014-0.022

3/8″

 0.02-0.028

1/2″

 0.03-0.037

5/8″

0.037-0.047

3/4″

0.047-0.057

7/8″

0.051-0.063

1 1/8″

 0.067-0.081.

6. A refrigeration system comprising:

the composite line set according to claim 3 .

Assignments (1)

Continuity (5)

References Cited (147)