US4296157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube with weakened side wall segment
Assignee: AES ACQUISITION Co A CORP OF OH
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Filing: 1979-03-22
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Granted: 1981-10-20
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Expires: 1999-03-22
Abstract
Abstract An elongated cylinder is essentially comprised of a continuous side wall with a narrow weak wall segment along the length thereof for fracturing by the application of a small force to permit access to the interior of the cylinder along the fractured side wall. The weak side wall segment is in the form of a very thin web section produced by grinding or in a molding operation which may additionally include the filling of the hollowed area of the side wall with a dissimilar material. The article is used for cable placement, varmint protectors for tree trunks, protectors for wire harnesses, protectors for cable splices, and a mold for concrete.
Inventors
- 👤 Allen C. Conti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:44
CPC Classifications
H; H02; H02G; H02G1/00; H02G1/06; H02G1/08; Y; Y10; Y10S; Y10S229/00; Y10S229/927; Y10T; Y10T428/00; Y10T428/15
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
A tubular apparatus to protect a cable from damage comprising an open-ended elongated hollow tube having a side wall with a continuous internal surface of a first thermoplastic material and of substantially uniform thickness throughout except for a narrow arcuate web segment of reduced thickness along substantially the entire length of the tube to create a line of weakness for access to the interior of said tube along a parting line defined by fracturing the arcuate web segment under an applied force, and a coextruded insert of a second thermoplastic material dissimilar to said first thermoplastic material adhered to the exterior wall surface of said arcuate web segment to maintain said line of weakness.
Claim 2
Dependent Claim
114 words
A tubular apparatus to protect a cable from damage comprising an open-ended elongated hollow tube having a side wall with a continuous internal surface of a first thermoplastic material and of substantially uniform thickness throughout except for a narrow arcuate web segment of reduced thickness along substantially the entire length of the tube to create a line of weakness for access to the interior of said tube along a parting line defined by fracturing the arcuate web segment under an applied force, and a coextruded insert of a second thermoplastic material dissimilar to said first thermoplastic material adhered to the exterior wall surface of said arcuate web segment to maintain said line of weakness.
Claim 3
Dependent Claim
20 words
The apparatus according to claim 1 wherein said tube is corrugated to form ribs for flexibility along the length thereof.
References Cited (Backward Citations)
US2729696A
Cited
US3034941A
Cited
US3070274A
Cited
US3812002A
Cited
US3489183A
Cited
US3417675A
Cited
US3642396A
Cited
US3616990A
Cited
US3746201A
Cited
US4015732A
Cited
US3843438A
Cited
US3796370A
Cited
US3812282A
Cited
US3873018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |