Patent US3335758A successfully refreshed from Google Patents.
US3335758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic-lined conduit
Assignee: TFE Co
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Filing: 1964-09-22
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Granted: 1967-08-15
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Expires: 1984-09-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Elmer C Bertolet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:24
CPC Classifications
F; F16; F16L; F16L51/00; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1009; F16L58/1027; Y; Y10; Y10S; Y10S220/00; Y10S220/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A CONDUCTOR FOR HIGH TEMPERATURE FLUIDS, COMPRISING A CONDUIT, AND A PLASTIC LINER IN THE CONDUIT IN ENGAGEMENT THEREWITH HAVING A GREATER THERMAL COEFFICIENT OF LINEAR EXPANSION THAN THE CONDUIT AND HAVING END PORTIONS ADAPTED TO BE ANCHORED TO THE ENDS OF THE CONDUIT, THE LINER NORMALLY HAVING A SUBSTANTIALLY UNIFORM INSIDE DIAMETER BETWEEN SAID END PORTIONS, AND THE OUTSIDE OF THE LINER HAVING A PLURALITY OF ENCIRCLING GROOVES THEREIN EXTENDING SUBSTANTIALLY HALF WAY THROUGH THE LINER WALL TO PROVIDE THE LINER WITH PORTIONS OF REDUCED WALL THICKNESS THAT WILL BUCKLE INWARDLY WHEN THE LINER IS HEATED AND ATTEMPTS TO EXPAND LENGTHWISE RELATIVE TO THE CONDUIT, THERE BEING A SUFFICIENT NUMBER OF SAID GROOVES TO MAINTAIN THE SECTIONS OF THE HEATED LINER BETWEEN THE GROOVES IN ENGAGEMENT WITH THE ENCIRCLING WALL OF THE CONDUIT.
Claim 2
Dependent Claim
134 words
A CONDUCTOR FOR HIGH TEMPERATURE FLUIDS, COMPRISING A CONDUIT, AND A PLASTIC LINER IN THE CONDUIT IN ENGAGEMENT THEREWITH HAVING A GREATER THERMAL COEFFICIENT OF LINEAR EXPANSION THAN THE CONDUIT AND HAVING END PORTIONS ADAPTED TO BE ANCHORED TO THE ENDS OF THE CONDUIT, THE LINER NORMALLY HAVING A SUBSTANTIALLY UNIFORM INSIDE DIAMETER BETWEEN SAID END PORTIONS, AND THE OUTSIDE OF THE LINER HAVING A PLURALITY OF ENCIRCLING GROOVES THEREIN EXTENDING SUBSTANTIALLY HALF WAY THROUGH THE LINER WALL TO PROVIDE THE LINER WITH PORTIONS OF REDUCED WALL THICKNESS THAT WILL BUCKLE INWARDLY WHEN THE LINER IS HEATED AND ATTEMPTS TO EXPAND LENGTHWISE RELATIVE TO THE CONDUIT, THERE BEING A SUFFICIENT NUMBER OF SAID GROOVES TO MAINTAIN THE SECTIONS OF THE HEATED LINER BETWEEN THE GROOVES IN ENGAGEMENT WITH THE ENCIRCLING WALL OF THE CONDUIT.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |