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US3141480A
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Reinforced pipe
Assignee: Armco Inc
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Filing: 1961-12-26
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Granted: 1964-07-21
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Harry R Ralston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:52
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/02; F16L9/04; F16L11/00; F16L11/04; F16L11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A REINFORCED METALLIC PIPE CONSISTING ESSENTIALLY OF A SMOOTH WALL PIPE HAVING AN OUTSIDE DIAMETER OF FROM 10 TO 60 INCHES AND A GAUGE FROM 24 FOR 10 INCH PIPE TO A GAUGE OF 12 FOR 60 INCH PIPE, WHICH PIPE, WHILE ESSENTIALLY RIGID, WILL FLEX AND DISTORT DURING HANDLING AND PLACEMENT, SAID PIPE BEING REINFORCED EXTERNALLY BY A HELICAL MEMBER HAVING AN INTERNAL DIAMETER IN ITS FREE STATE SLIGHTLY LESS THAN THE OUTSIDE DIAMETER OF SAID PIPE, AND HAVING AN INTERNAL DIAMETER IN A COMPRESSED STATE SLIGHTLY LARGER THAN THE OUTSIDE DIAMETER OF SAID PIPE, WHEREBY IT MAY BE SLIPPED OVER THE PIPE IN A COMPRESSED STATE AND THEN RELEASED TO SNUGLY EMBRACE THE PIPE OVER SUBSTANTIALLY ITS ENTIRE LENGTH, THE SPACING BETWEEN THE CONVOLUTIONS OF SAID HELICAL MEMBER WHEN RELEASED TO EMBRACE SAID PIPE BEING ON THE ORDER OF 65% OF THE PIPE OUTSIDE DIAMETER, SAID HELICAL MEMBER BEING FORMED FROM METALLIC TUBING HAVING AN OUTSIDE DIAMETER OF FROM ABOUT 3/8 INCH TO 2 3/4 INCHES, THE DIAMETER OF THE TUBING INCREASING IN PORPORTION TO THE DIAMETER OF THE PIPE.
Claim 2
Dependent Claim
182 words
A REINFORCED METALLIC PIPE CONSISTING ESSENTIALLY OF A SMOOTH WALL PIPE HAVING AN OUTSIDE DIAMETER OF FROM 10 TO 60 INCHES AND A GAUGE FROM 24 FOR 10 INCH PIPE TO A GAUGE OF 12 FOR 60 INCH PIPE, WHICH PIPE, WHILE ESSENTIALLY RIGID, WILL FLEX AND DISTORT DURING HANDLING AND PLACEMENT, SAID PIPE BEING REINFORCED EXTERNALLY BY A HELICAL MEMBER HAVING AN INTERNAL DIAMETER IN ITS FREE STATE SLIGHTLY LESS THAN THE OUTSIDE DIAMETER OF SAID PIPE, AND HAVING AN INTERNAL DIAMETER IN A COMPRESSED STATE SLIGHTLY LARGER THAN THE OUTSIDE DIAMETER OF SAID PIPE, WHEREBY IT MAY BE SLIPPED OVER THE PIPE IN A COMPRESSED STATE AND THEN RELEASED TO SNUGLY EMBRACE THE PIPE OVER SUBSTANTIALLY ITS ENTIRE LENGTH, THE SPACING BETWEEN THE CONVOLUTIONS OF SAID HELICAL MEMBER WHEN RELEASED TO EMBRACE SAID PIPE BEING ON THE ORDER OF 65% OF THE PIPE OUTSIDE DIAMETER, SAID HELICAL MEMBER BEING FORMED FROM METALLIC TUBING HAVING AN OUTSIDE DIAMETER OF FROM ABOUT 3/8 INCH TO 2 3/4 INCHES, THE DIAMETER OF THE TUBING INCREASING IN PORPORTION TO THE DIAMETER OF THE PIPE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |