Patent US4148127A successfully refreshed from Google Patents.
US4148127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying a bond-type crack arrestor to a pipe section of a pipeline
Assignee: Northern Border Pipeline Co
•
Filing: 1976-10-19
•
Granted: 1979-04-10
•
Expires: 1996-10-19
Abstract
Abstract A method of applying a band-type crack arrestor to a pipeline formed from a plurality of sections of pipe connected together end-to-end relation comprising placing the arrestor over the outer diameter of a pipe section and applying radial force to the inner diameter of the pipe section to engage the arrestor in a substantially stress free tight fit.
Inventors
- 👤 Francis S. Somerville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:58
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/04; B23; B23P; B23P11/00; B23P11/02; F; F16; F16L; F16L57/00; F16L57/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
A method of applying a band-type crack arrestor to a pipe section of a gas pipeline having a yield strength comprising: (a) placing said arrestor over the outer diameter of said pipe section; (b) applying radial force to the inner diameter of said pipe section to expand said pipe section sufficiently to increase the yield strength of the pipe section and to engage said arrestor in a substantially stress free tight fit while said arrestor is in the position it is to occupy along the pipe length.
Claim 2
Independent Claim
87 words
A method of applying a band-type crack arrestor to a pipe section of a gas pipeline having a yield strength comprising: (a) placing said arrestor over the outer diameter of said pipe section; (b) applying radial force to the inner diameter of said pipe section to expand said pipe section sufficiently to increase the yield strength of the pipe section and to engage said arrestor in a substantially stress free tight fit while said arrestor is in the position it is to occupy along the pipe length.
Claim 3
Dependent Claim
18 words
The method of claim 1, wherein said force is applied by expanding die segments within said pipe section.
Claim 4
Dependent Claim
21 words
The method of claim 1, wherein a layer of corrosion resistant material is compressed between said arrestor and said pipe section.
Claim 5
Independent Claim
76 words
A method of applying a band-type crack arrestor to a pipe section of a gas pipeline comprising: (a) placing said arrestor over the outer diameter of said pipe section; (b) applying radial force to the inner diameter of said pipe section to expand said pipe section approximately 11/2% in diameter to engage said arrestor in a substantially stress free tight fit while said arrestor is in the position it is to occupy along the pipe length.
Claim 6
Independent Claim
76 words
A method of applying a band-type crack arrestor to a pipe section of a gas pipeline comprising: (a) placing said arrestor over the outer diameter of said pipe section; (b) applying radial force to the inner diameter of said pipe section to expand said pipe section approximately 11/2% in diameter to engage said arrestor in a substantially stress free tight fit while said arrestor is in the position it is to occupy along the pipe length.
Claim 7
Dependent Claim
18 words
The method of claim 4, wherein said force is applied by expanding die segments within said pipe section.
Claim 8
Dependent Claim
21 words
The method of claim 4, wherein a layer of corrosion resistant material is compressed between said arrestor and said pipe section.
Claim 9
Independent Claim
95 words
A method of applying a band-type crack arrestor to a pipe section of a gas pipeline comprising: (a) fabricating the arrestor from a material having a yield strength not substantially greater than the yield strength of the pipe section; (b) placing said arrestor over the outer diameter of said pipe section; (c) applying radial force to the inner diameter of said pipe section to expand said pipe section sufficiently to engage said arrestor in a substantially stress free tight fit while said arrestor is in the position it is to occupy along the pipe length.
Claim 10
Independent Claim
95 words
A method of applying a band-type crack arrestor to a pipe section of a gas pipeline comprising: (a) fabricating the arrestor from a material having a yield strength not substantially greater than the yield strength of the pipe section; (b) placing said arrestor over the outer diameter of said pipe section; (c) applying radial force to the inner diameter of said pipe section to expand said pipe section sufficiently to engage said arrestor in a substantially stress free tight fit while said arrestor is in the position it is to occupy along the pipe length.
Claim 11
Dependent Claim
18 words
The method of claim 7, wherein said force is applied by expanding die segments within said pipe section.
Claim 12
Dependent Claim
21 words
The method of claim 7, wherein a layer of corrosion resistant material is compressed between said arrestor and said pipe section.
References Cited (Backward Citations)
US1733455A
Cited
GB296015A
Cited
GB340148A
Cited
GB401958A
Cited
US3345730A
Cited
US3377757A
Cited
US3349807A
Cited
US3768269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |