US4161273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube joint and method of making same
Assignee: Jones and Laughlin Steel Inc
•
Filing: 1977-02-22
•
Granted: 1979-07-17
•
Expires: 1997-02-22
Abstract
Abstract A tube joint including a male end which has a rounded inner edge having its original surface finish and a female end which is expanded to receive the male end. The male end is formed by chamfering the end outer diameter and flaring the end inner diameter until the end inner diameter is substantially rounded. The female end is expanded so its inner diameter is only slightly greater than the outer diameter of the male end.
Inventors
- 👤 Robert P. Jeffers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:00
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/20; B21; B21D; B21D39/00; B21D39/04; B23K33/00; B23K33/004; B23K33/006; F; F16; F16L; F16L13/00; F16L21/00; B23K2101/00; B23K2101/04; B23K2101/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
The method of forming a tube joint comprising: chamfering the end outer diameter of a male tube and then flaring the end inner diameter of said male tube until the end outer diameter is substantially equivalent to the outer diameter of the remainder of said male tube; expanding one end of a second tube to receive said male end, thus forming a female end; and connecting said male and female ends.
Claim 2
Independent Claim
71 words
The method of forming a tube joint comprising: chamfering the end outer diameter of a male tube and then flaring the end inner diameter of said male tube until the end outer diameter is substantially equivalent to the outer diameter of the remainder of said male tube; expanding one end of a second tube to receive said male end, thus forming a female end; and connecting said male and female ends.
Claim 3
Independent Claim
65 words
The method of making a tube joint including a male and female end comprising: flaring said male end; removing the flared portion from the outer surface of said male end so that said male end outer surface has substantially the same outer diameter as the remainder of the tube; expanding said female end to receive said male end; and connecting said male and female ends.
Claim 4
Independent Claim
65 words
The method of making a tube joint including a male and female end comprising: flaring said male end; removing the flared portion from the outer surface of said male end so that said male end outer surface has substantially the same outer diameter as the remainder of the tube; expanding said female end to receive said male end; and connecting said male and female ends.
Claim 5
Independent Claim
53 words
A method of making the male end of a tube joint comprising: flaring the end of a tube; and removing the flared portion from the outer surface of a said tube end so that the outer surface of said tube end has substantially the same outer diameter as the remainder of the tube.
Claim 6
Independent Claim
53 words
A method of making the male end of a tube joint comprising: flaring the end of a tube; and removing the flared portion from the outer surface of a said tube end so that the outer surface of said tube end has substantially the same outer diameter as the remainder of the tube.
References Cited (Backward Citations)
US1610165A
Cited
US1299371A
Cited
US2142149A
Cited
US2037962A
Cited
US2679681A
Cited
GB667143A
Cited
US2910983A
Cited
US3466738A
Cited
US3872707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-16 | 1983-01-15 | 1983-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-16 | 1987-01-15 | 1987-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-16 | 1991-01-15 | 1991-07-17 | $7700.00 | Window Closed / Lapsed |