Patent US4050230A successfully refreshed from Google Patents.
US4050230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rope
Assignee: Toyo Rope Manufacturing Co Ltd
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Filing: 1976-02-23
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Granted: 1977-09-27
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Expires: 1996-02-23
Abstract
Abstract The rope of this invention comprises a plurality of strands each having a twisted reinforcing fiber bundle, thermosetting resin applied to the fiber bundle, and a thermoplastic resin cover enclosing the fiber bundle. Each strand in the rope is kept to substantially a round sectional shape by the twisted fiber bundle. The method for forming the rope comprises the steps of twisting the reinforcing fibers in such a manner that the tensile strength of the twisted fibers is not reduced to less than 50% of the fibers not twisted, applying an uncured thermosetting resin to the twisted fibers, covering the fibers with a molten thermoplastic resin, cooling the thermoplastic resin to cover the fibers with solidified thermoplastic resin and thereby forming a strand, forming a rope structure from a plurality of the strands, and heating the rope structure to cure the thermosetting resin applied on the fibers.
Inventors
- 👤 Tadao Senoo
- 👤 Kenji Honda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:00
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/16; D07B1/162; D07B1/02; D07B1/025; D07B1/165; D07B2201/00; D07B2201/10; D07B2201/1012; D07B2201/102; D07B2201/1028; D07B2201/1032; D07B2201/104; D07B2201/1096; D07B2201/20; D07B2201/2047; D07B2201/2048; D07B2201/2049; D07B2201/2052; D07B2201/2055; D07B2205/00; D07B2205/20; D07B2205/2046; D07B2205/205; D07B2207/00; D07B2207/40; D07B2207/404; D07B2207/4068
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A rope comprising: an inner core fiber bundle comprised of: a plurality of first synthetic fibers, a first thermosetting resin impregnating and connecting said first fibers, and a first thermoplastic coating layer surrounding said first thermosetting resin immpregnated fibers; and a plurality of outer fiber bundles surrounding said core fiber bundles, each outer fiber bundle comprised of: a plurality of second synthetic fibers, a second thermosetting resin impregnating said second fibers, and a second thermoplastic resin coating layer surrounding said second fibers impregnated with said thermosetting resin.
Claim 2
Dependent Claim
87 words
A rope comprising: an inner core fiber bundle comprised of: a plurality of first synthetic fibers, a first thermosetting resin impregnating and connecting said first fibers, and a first thermoplastic coating layer surrounding said first thermosetting resin immpregnated fibers; and a plurality of outer fiber bundles surrounding said core fiber bundles, each outer fiber bundle comprised of: a plurality of second synthetic fibers, a second thermosetting resin impregnating said second fibers, and a second thermoplastic resin coating layer surrounding said second fibers impregnated with said thermosetting resin.
Claim 3
Dependent Claim
67 words
A rope as claimed in claim 1, wherein: said first synthetic fibers are aramid fibers and said first thermosetting resin impregnating said first synthetic fibers is an uncured thermosetting polyurethane resin; said second synthetic fibers are slightly twisted aramid fibers, and said second thermosetting resin impregnating said second synthetic fibers is an uncured thermosetting polyurethane resin; and said first and second thermoplastic resin coverings are thermoplastic nylon.
Claim 4
Dependent Claim
131 words
The rope comprising: a first core fiber bundle comprised of: a plurality of first synthetic fibers, a first thermosetting resin impregnating said first fibers, and a first thermoplastic resin layer covering said impregnated fibers; and a plurality of strands surrounding said first core fiber bundle, each strand comprised of: a second inner core fiber bundle comprised of: a plurality of second synthetic fibers, a second thermosetting resin impregnating and connecting said second fibers, and a second thermoplastic coating layer surrounding said second thermosetting resin impregnated fibers, a plurality of outer fiber bundles surrounding said second core fiber bundle, each outer fiber bundle comprised of: a plurality of third synthetic fibers, a third thermosetting resin impregnating said third fibers; and a third thermoplastic resin covering surrounding said third thermosetting resin impregnated fibers.
Claim 5
Dependent Claim
131 words
The rope comprising: a first core fiber bundle comprised of: a plurality of first synthetic fibers, a first thermosetting resin impregnating said first fibers, and a first thermoplastic resin layer covering said impregnated fibers; and a plurality of strands surrounding said first core fiber bundle, each strand comprised of: a second inner core fiber bundle comprised of: a plurality of second synthetic fibers, a second thermosetting resin impregnating and connecting said second fibers, and a second thermoplastic coating layer surrounding said second thermosetting resin impregnated fibers, a plurality of outer fiber bundles surrounding said second core fiber bundle, each outer fiber bundle comprised of: a plurality of third synthetic fibers, a third thermosetting resin impregnating said third fibers; and a third thermoplastic resin covering surrounding said third thermosetting resin impregnated fibers.
Claim 6
Dependent Claim
56 words
A rope as claimed in claim 3 wherein: said first, second and third synthetic fibers are aramid fibers; said first and second thermosetting resins are uncured thermosetting polyurethane resin; said third thermosetting resin impregnating said third synthetic fibers is an uncured thermosetting polyester resin; and said first, second and third thermoplastic resin coverings are thermoplastic nylon.
Claim 7
Dependent Claim
51 words
A rope as claimed in claim 3 wherein: said first, second and third synthetic fibers are aramid fibers; said first thermosetting resin is an uncured thermosetting polyurethane resin; said second and third thermosetting resins are uncured thermosetting polyester resin; and said first, second and third thermoplastic resin coverings are thermoplastic nylon.
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |