US4887422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rope with fiber core and method of forming same
Assignee: Wire Rope Corp of America Inc
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Filing: 1988-09-06
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Granted: 1989-12-19
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Expires: 2008-09-06
Abstract
Abstract This invention provides a composite wire rope comprising a plurality of outer strands laid helically about a helically stranded core. The core is comprised of high strength synthetics, such as polyamide or polyolefin materials to form a unitized lay central member. The method for forming the rope comprises the steps of twisting high strength synthetic monofilament yarns into core elements to provide a high degree of stability and overall tensile strength. Each such element is helically laid in a single operation to form the finished core. Lubricant may be applied and subsequently a protective jacket of steel, natural or synthetic material may be provided to encapsulate the core and lubricant. The rope structure is completed by helically laying a plurality of outer strands about the core.
Inventors
- 👤 David A. Klees
- 👤 Robert B. Hoganson
- 👤 Harry L. Data
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:29
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0673; D07B1/0686; D07B1/02; D07B1/025; D07B1/14; D07B1/141; D07B1/142; D07B2201/00; D07B2201/10; D07B2201/1012; D07B2201/102; D07B2201/1028; D07B2201/1032; D07B2201/20; D07B2201/2047; D07B2201/2052; D07B2201/2055; D07B2201/2057; D07B2201/2065; D07B2201/2067; D07B2201/2068; D07B2201/2071; D07B2201/2074; D07B2205/00; D07B2205/20; D07B2205/201; D07B2205/2046; D07B2205/30; D07B2205/3007; D07B2207/00; D07B2207/20; D07B2207/204; D07B2207/209; D07B2501/00; D07B2501/20; D07B2501/2007; D07B5/00; D07B5/007; D07B7/00; D07B7/02; D07B7/027
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
75 words
A rope comprising a core comprising a plurality of helically twisted elements, each element comprising a plurality of helically twisted high strength synthetic yarns, and outer strands arranged in a helical pattern surrounding said core, each of said outer strands comprising a plurality of helically twisted metal wires, with the rope achieving a balanced set of helices whereby the elastic modulus of the core and the elastic modulus of the outer strands are about equal.
Claim 2
Dependent Claim
75 words
A rope comprising a core comprising a plurality of helically twisted elements, each element comprising a plurality of helically twisted high strength synthetic yarns, and outer strands arranged in a helical pattern surrounding said core, each of said outer strands comprising a plurality of helically twisted metal wires, with the rope achieving a balanced set of helices whereby the elastic modulus of the core and the elastic modulus of the outer strands are about equal.
Claim 3
Dependent Claim
21 words
The rope of claim 1 wherein said synthetic yarns in said core are comprised of polyamide, polyolefin, carbon or boron fibers.
Claim 4
Dependent Claim
14 words
The rope of claim 1 further comprising a layer of strands surrounding said core.
Claim 5
Dependent Claim
15 words
The rope of claim 1 further comprising a layer of coating material on said core.
Claim 6
Dependent Claim
26 words
The rope of claim 4 wherein said layer of coating material is comprised of a thermoforming, thermosetting or elastomeric plastic, paper, woven fabric or plastic film.
Claim 7
Dependent Claim
11 words
The rope of claim 1 wherein the core elements are lubricated.
Claim 8
Dependent Claim
18 words
The rope of claim 1 wherein the core elements are bonded with a resin or similar bonding compound.
Claim 9
Dependent Claim
88 words
A rope comprising a core comprised of a plurality of core elements wound in a helical configuration, each of said core elements comprised of a plurality of high strength synthetic yarns, and a plurality of outer strands arranged in a helical configuration around said core, each of said outer strands formed by a plurality of metal wires arranged in a helical configuration, with the rope achieving a balanced set of helices whereby the elastic modulus of the core and elastic modulus of the outer strands are about equal.
Claim 10
Dependent Claim
88 words
A rope comprising a core comprised of a plurality of core elements wound in a helical configuration, each of said core elements comprised of a plurality of high strength synthetic yarns, and a plurality of outer strands arranged in a helical configuration around said core, each of said outer strands formed by a plurality of metal wires arranged in a helical configuration, with the rope achieving a balanced set of helices whereby the elastic modulus of the core and elastic modulus of the outer strands are about equal.
Claim 11
Dependent Claim
19 words
The rope of claim 8 wherein said core synthetic yarns are comprised of polyamide, polyolefin, carbon or boron fibers.
Claim 12
Dependent Claim
20 words
The rope of claim 8 wherein said synthetic yarns are arranged in a helical configuration to form said core elements.
Claim 13
Dependent Claim
12 words
The rope of claim 8 further comprising a jacket surrounding said core.
Claim 14
Dependent Claim
16 words
The rope of claim 11 wherein said jacket comprises metal wires, natural fibers or synthetic fibers.
Claim 15
Dependent Claim
15 words
The rope of claim 8 further comprising a layer of coating material on said core.
Claim 16
Dependent Claim
24 words
The rope of claim 13 wherein said coating material is comprised of a thermoforming, thermosetting or elastomeric plastic, paper, woven fabric or plastic film.
Claim 17
Dependent Claim
11 words
The rope of claim 8 wherein said core elements are lubricated.
Claim 18
Dependent Claim
18 words
The rope of claim 8 wherein said core elements are bonded with a resin or similar bonding compound.
Claim 19
Independent Claim
68 words
A method of producing a rope comprising the steps of twisting high strength synthetic yarns into core elements, helically winding such core elements to form a rope core, and helically laying a plurality of outer strands about said core, each of said outer strands comprising a plurality of metal wires, wherein the elastic modulus of the core and the elastic modulus of the outer strands are about equal.
Claim 20
Independent Claim
68 words
A method of producing a rope comprising the steps of twisting high strength synthetic yarns into core elements, helically winding such core elements to form a rope core, and helically laying a plurality of outer strands about said core, each of said outer strands comprising a plurality of metal wires, wherein the elastic modulus of the core and the elastic modulus of the outer strands are about equal.
Claim 21
Dependent Claim
20 words
The method of claim 17 wherein said high strength synthetic yarns are comprised of polyamide, polyolefin, carbon or boron fibers.
Claim 22
Dependent Claim
23 words
The method of claim 17 wherein a lubricant is applied to the core elements as they are wound to form said rope core.
Claim 23
Dependent Claim
15 words
The method of claim 17 wherein a coating material is applied to said rope core.
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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) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |