Tube joints, brazed tube joint assemblies, and methods of making tube joints

Patent metadata

Field	Value
Publication number	US-11015745-B2
Application number	US-201815949737-A
Country	US
Kind code	B2
Filing date	Apr 10, 2018
Priority date	Apr 10, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A tube joint includes a first member and a second member. The first member has a bore defining an inner diameter. The second member has a first outer surface defining a first outer diameter with two or more helical protrusions extending radially from the first outer diameter. The two or more helical protrusions collectively define a second outer diameter. The second outer diameter of the second member is larger than the inner diameter of the first member by an amount sufficient to center and retain the second member within the bore of the first member. Brazed tube joint assemblies and methods of making brazed tube joints are also described.

First claim

What is claimed is:

1. A tube joint, comprising:
a first member having a bore defining an inner diameter; and
a second member with a first outer surface defining a first outer diameter having a plurality of helical protrusions extending radially from the first outer diameter, a second outer surface on each of the plurality of protrusions collectively defining a second outer diameter, wherein the second diameter larger than the inner diameter by an amount sufficient to center and retain the second member within the bore of the first member, wherein the helical protrusions are separated from one another in an axial direction by circumferential bottom land surfaces, and wherein the helical protrusions are separated from one another in a circumferential direction by helical bottom land surfaces, further comprising a braze alloy element coupled to the second member adjacent to the two or more helical protrusions.

2. The tube joint as recited in claim 1 , wherein the helical bottom land surfaces and the circumferential bottom land surfaces are arranged on a common diameter.

3. The tube joint as recited in claim 1 , wherein a surface of the second member having the two or more helical protrusions is unknurled.

4. The tube joint as recited in claim 1 , wherein the second member is fixed within a bore of a first member by solder, a weld, or an interference fit defined between the plurality of helical protrusions and the bore.

5. A tube joint, comprising:
a first member having a bore defining an inner diameter; and
a second member with a first outer surface defining a first outer diameter having a plurality of helical protrusions extending radially from the first outer diameter, a second outer surface on each of the plurality of protrusions collectively defining a second outer diameter, wherein the second diameter larger than the inner diameter by an amount sufficient to center and retain the second member within the bore of the first member, wherein the helical protrusions an separated from one another in an axial direction by circumferential bottom land surfaces, and wherein the helical protrusions are separated from one another in a circumferential direction by, helical bottom land surfaces, further comprising a braze alloy fixing the second member within the bore of the first member.

6. The tube joint as recited in claim 5 , wherein the helical bottom land surfaces and the circumferential bottom land surfaces are arranged on a common diameter.

7. The tube joint as recited in claim 5 , wherein a surface of the second member having the two or more helical protrusions is unknurled.

8. The tube joint as recited in claim 5 , wherein the second member is fixed within a bore of a first member by solder, a weld, or an interference fit defined between the plurality of helical protrusions and the bore.

9. A tube joiint, comprising:
a first member having a bore defining an inner diameter; and
a second member with a first outer surface defining a first outer diameter having a plurality of helical protrusions extending radially from the first outer diameter, a second outer surface on each of the plurality of protrusions collectively defining a second outer diameter, wherein the second diameter larger than the inner diameter by an amount sufficient to center and retain the second member within the bore of the first member, wherein the helical protrusions are separated from one another in an axial direction by circumferential bottom land surfaces, and wherein the helical protrusions are separated from one another in a circumferential direction by helical bottom land surfaces, wherein the helical bottom land surfaces and the circumferential bottom land surfaces are arranged on a common diameter, the tube joint further comprising a braze alloy element coupled to the second member and adjacent to the two or more helical protrusions.

10. The tube joint as recited in claim 9 , wherein the helical bottom land surfaces and the circumferential bottom land surfaces are arranged on a common diameter.

11. The tube joint as recited in claim 9 , wherein a surface of the second member having the two or more helical protrusions is unknurled.

12. The tube joint as recited in claim 9 , wherein the second member is fixed within a bore of a first member by solder, a weld, or an interference fit defined between the plurality of helical protrusions and the bore.

13. A tube joint, comprising:
a first member having a bore defining an inner diameter; and
a second member with a first outer surface defining a first outer diameter having a plurality of helical protrusions extending radially from the first outer diameter, a second outer surface on each of the plurality of protrusions collectively defining a second outer diameter, wherein the second diameter larger than the inner diameter by an amount sufficient to center and retain the second member within the bore of the first member, wherein the helical protrusions are separated from one another in an axial direction by circumferential bottom land surfaces, and wherein the helical protrusions are separated from one another in a circumferential direction by helical bottom land surfaces, wherein the helical bottom land surfaces and the circumferential bottom land surfaces are arranged on a common diameter, the tube joint further comprising a braze alloy fixing the second member within the bore of the first member.

14. The tube joint as recited in claim 13 , wherein the helical bottom land surfaces and the circumferential bottom land surfaces are arranged on a common diameter.

15. The tube joint as recited in claim 13 , wherein a surface of the second member having the two or more helical protrusions is unknurled.

16. The tube joint as recited in claim 13 , wherein the second member is fixed within a bore of a first member by solder, a weld, or an interference fit defined between the plurality of helical protrusions and the bore.

17. A tube joint, comprising:
a first member having a bore defining an inner diameter; and
a second member with a first outer surface defining a first outer diameter having a plurality of helical protrusions extending radially from the first outer diameter, a second outer surface on each of the plurality of protrusions collectively defining a second outer diameter, wherein the second diameter larger than the inner diameter by an amount sufficient to center and retain the second member within the bore of the first member, wherein the helical protrusions are separated from one another in an axial direction by circumferential bottom land surfaces, and wherein the helical protrusions are separated from one another in a circumferential direction by helical bottom land surfaces, wherein the helical bottom land surfaces and the circumferential bottom land surfaces are arranged on a common diameter, the tube joint, further comprising solder, a weld, or an interference fit between the helical protrusions and the bore fixing the second member within the bore of the first member.

18. The tube joint as recited in claim 17 , wherein the helical bottom land surfaces and the circumferential bottom land surfaces are arranged on a common diameter.

19. The tube joint as recited in claim 17 , wherein a surface of the second member having the two or more helical protrusions is unknurled.

20. The tube joint as recited in claim 17 , wherein the second member is fixed within a bore of a first member by solder, a weld, or an interference fit defined between the plurality of helical protrusions and the bore.

Assignees

• Delavan Inc

Inventors

• Clausen Derrick
• Myers Steven J
• Heffernan David

Classifications

• F23D11/38

  Nozzles; Cleaning devices therefor · CPC title

• F16L13/08 Primary

  Soldered joints · CPC title

• B23K1/00

  Soldering, e.g. brazing, or unsoldering (B23K3/00 takes precedence) · CPC title

• B23K2101/06

  Tubes · CPC title