Patent US3665591A successfully refreshed from Google Patents.
US3665591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making up an expandable insert fitting
Assignee: Clevite Industries Inc
•
Filing: 1970-01-02
•
Granted: 1972-05-30
•
Expires: 1990-01-02
Abstract
Abstract A method of making-up a fitting having a deformable insert adapted to be disposed coaxially within a tube end. The insert is expanded by a punch having spaced annular swaging portions of progressively increasing diameter whereby successive enlarging operations are effected as a result of an axial movement of the punch through the insert. The punch includes a shaft with the annular swaging portions being formed integrally with the shaft. The enlarging portions may be uniformly axially spaced to assure the action of only a single swaging portion on the insert at a given time.
Inventors
- 👤 Leonard J Kowal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:17
CPC Classifications
F; F16; F16L; F16L33/00; F16L33/20; F16L33/213; B; B21; B21D; B21D39/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49909; Y10T29/49911; Y10T29/49938; Y10T29/4994; Y10T29/53; Y10T29/5367
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
134 words
A method of making-up a fitting having a deformable insert adapted to be disposed coaxially within a tube end, and an effectively rigid shell adapted to be disposed coaxially about said tube end, said method comprising the steps of: retaining the insert, tube end, and shell in substantially axially fixed, concentric relationship; coaxially inserting into said insert an expanding tool having a plurality of axially spaced, sequentially diametrically larger expanding means; urging the first expanding means of said tool coaxially fully through said insert to provide an internal radial expansion thereof; and subsequently urging the larger diameter expanding means of said tool coaxially fully through said insert to provide a further nonconcurrent radial expansion of the insert sufficient to cause sealing compression of the tube end between the expanded insert and the surrounding shell.
Claim 2
Independent Claim
134 words
A method of making-up a fitting having a deformable insert adapted to be disposed coaxially within a tube end, and an effectively rigid shell adapted to be disposed coaxially about said tube end, said method comprising the steps of: retaining the insert, tube end, and shell in substantially axially fixed, concentric relationship; coaxially inserting into said insert an expanding tool having a plurality of axially spaced, sequentially diametrically larger expanding means; urging the first expanding means of said tool coaxially fully through said insert to provide an internal radial expansion thereof; and subsequently urging the larger diameter expanding means of said tool coaxially fully through said insert to provide a further nonconcurrent radial expansion of the insert sufficient to cause sealing compression of the tube end between the expanded insert and the surrounding shell.
Claim 3
Dependent Claim
27 words
The method of making-up a fitting of claim 1 wherein said expanding means are spaced apart a distance substantially equal to the axial length of the insert.
Claim 4
Dependent Claim
42 words
The method of making-up a fitting of claim 1 wherein the diameters of the respective expanding means are preselected to provide sequentially smaller differences therebetween whereby the amount of radial expansion of the insert by the successively inserted expanding means decreases sequentially.
Claim 5
Dependent Claim
24 words
The method of making-up a fitting of claim 1 wherein the respective expanding means have an axial extent of approximately l to 3 mils.
Claim 6
Dependent Claim
26 words
The method of making-up a fitting of claim 1 wherein a clearance between the insert and the expanding tool is provided intermediate the respective expanding means.
Claim 7
Independent Claim
31 words
The method of making-up a fitting of claim wherein the insert is transaxially movably retained during make-up of the fitting to permit self-centering of the insert relative to the expanding means.
Claim 8
Dependent Claim
31 words
The method of making-up a fitting of claim 1 wherein the expanding means are carried on a cantilevered support to permit limited self-centering of the expanding means relative to the fitting.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |