US3698746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crack arrester
Assignee: Atlantic Richfield Co
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Filing: 1971-01-18
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Granted: 1972-10-17
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Expires: 1991-01-18
Abstract
Abstract A crack arrester and a pipeline containing at least one of the same wherein the crack arrester is a cylindrical part for use inline in a pipeline, the cylindrical part having a longitudinal impact strength substantially greater than its transverse impact strength.
Inventors
- 👤 Rado G Loncaric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:22
CPC Classifications
F; F16; F16L; F16L57/00; F16L57/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49798
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
In a pipeline formed from a plurality of sections of pipe each section having a longitudinal impact strength substantially less than its transverse impact strength, the improvement comprising at least one crack arrester fixed in open communication in said pipeline at at least one intermediate point between the ends of said pipeline, each crack arrester comprising at least one cylindrical part, each cylindrical part having an impact strength at an angle between transverse and longitudinal which is substantially greater than the longitudinal impact strength of each section of pipe, said angle between transverse and longitudinal is in the range of from about 10* from transverse to about 10* from longitudinal.
Claim 2
Dependent Claim
110 words
In a pipeline formed from a plurality of sections of pipe each section having a longitudinal impact strength substantially less than its transverse impact strength, the improvement comprising at least one crack arrester fixed in open communication in said pipeline at at least one intermediate point between the ends of said pipeline, each crack arrester comprising at least one cylindrical part, each cylindrical part having an impact strength at an angle between transverse and longitudinal which is substantially greater than the longitudinal impact strength of each section of pipe, said angle between transverse and longitudinal is in the range of from about 10* from transverse to about 10* from longitudinal.
Claim 3
Dependent Claim
27 words
A pipeline according to claim 1 wherein a plurality of said crack arresters are fixed in-line in said pipeline at spaced apart points along the length thereof.
Claim 4
Dependent Claim
34 words
A pipeline according to claim 1 wherein each crack arrester comprises a spirally seamed cylindrical part whose impact strength at an angle between transverse and longitudinal is substantially greater than its transverse impact strength.
Claim 5
Dependent Claim
29 words
A pipeline according to claim 1 wherein said impact strength at an angle between transverse and longitudinal is at least about 25 percent greater than said transverse impact strength.
Claim 6
Dependent Claim
47 words
A pipeline according to claim 1 wherein each cylindrical part is formed from at least one rolled plate which has been formed into a cylindrical configuration, and the primary direction of rolling of said plate is at an angle between transverse and longitudinal in the cylindrical configuration.
Claim 7
Dependent Claim
12 words
A pipeline according to claim 1 wherein said plate is steel plate.
Claim 8
Dependent Claim
19 words
A pipeline according to claim 6 wherein said steel is primarily ferritic with minor amounts of austenite and/or martensite.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |