Patent US3778994A successfully refreshed from Google Patents.
US3778994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant wire rope and strand
Assignee: WILLIAMSPORT WIREROPE WORKS Inc A CORP OF PA
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Filing: 1972-08-09
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Granted: 1973-12-18
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Expires: 1992-08-09
Abstract
Abstract A wire rope or strand is provided with a plastic foam type internal sealant and corrosion resistant outer strands or wires to provide superior corrosion resistance at low cost for wire strands and ropes requiring a bare metal surface.
Inventors
- 👤 D Humphries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:30
CPC Classifications
D; D07; D07B; D07B5/00; D07B5/002; D07B1/00; D07B1/16; D07B7/00; D07B7/02; D07B7/14; D07B7/145; D07B1/06; D07B1/0673; D07B1/0693; D07B2201/00; D07B2201/20; D07B2201/2001; D07B2201/201; D07B2201/2011; D07B2201/2012; D07B2201/2015; D07B2201/2036; D07B2201/2042; D07B2201/2044; D07B2201/2046; D07B2201/2047; D07B2201/2066; D07B2201/2075; D07B2201/2082; D07B2401/00; D07B2401/20; D07B2401/202; D07B2401/2025; D07B2401/204; D07B5/005
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
50 words
A plastic impregnated wire strand comprising: a. a plurality of ferrous metal wires stranded together, b. a flexible plastic foam composition filling the interstices between the wires of the strand and adherent to the wires, and c. a plurality of corrosion resistant wires disposed about the stranded wires of (a).
Claim 2
Dependent Claim
37 words
A plastic impregnated wire strand according to claim 2 wherein the wire density of the strand is not substantially less than the wire density of a similar unimpregnated wire strand having identical metallic components and lay arrangement.
Claim 3
Dependent Claim
23 words
A wire strand according to claim 3 wherein the corrosion resistant wires are solid metallic wirEs composed throughout of the corrosion resistant material.
Claim 4
Dependent Claim
21 words
A wire strand according to claim 3 wherein the corrosion resistant wires are ferrous wires coated with a corrosion resistant material.
Claim 5
Dependent Claim
35 words
A wire strand according to claim 5 wherein the corrosion resistant material is a member of the group consisting of zinc, aluminum, aluminum-zinc, chromium, abrasion resistant plastic and alloys of zinc, aluminum, aluminum-zinc and chromium.
Claim 6
Dependent Claim
15 words
A wire strand according to claim 6 wherein the strand is a helical wire strand.
Claim 7
Dependent Claim
15 words
A wire strand according to claim 6 wherein the strand is a parallel wire strand.
Claim 8
Dependent Claim
70 words
A plastic impregnated wire rope comprising: a. a plurality of ferrous wire strands stranded together into a core strand, b. a plurality of wire strands having outer corrosion resistant wires and stranded about the core strand as an outer operation; and c. a flexible plastic-foam filling the interstices between the wires of the component strands and between the strands in the interior of the rope and adherent to the wires.
Claim 9
Dependent Claim
41 words
A plastic impregnated wire rope according to claim 9 wherein the wire density of the component strands of the rope is not substantially less than the wire density of a similar unimpregnated wire strand having identical metallic components and lay arrangements.
Claim 10
Dependent Claim
22 words
A plastic impregnated wire rope according to claim 10 wherein the corrosion resistant wires are composed entirely of a corrosion resistant metal.
Claim 11
Dependent Claim
27 words
A plastic impregnated wire rope according to claim 10 wherein the corrosion resistant wires are corrosion resistant by virtue of being coated with a corrosion resistant substance.
Claim 12
Dependent Claim
33 words
A plastic impreganted wire rope according to claim 12 wherein the corrosion resistant substance is a member of the group consisting of zinc, aluminum, aluminum-zinc, chromium alloys and corrosion and abrasion resistant plastic.
Claim 13
Independent Claim
66 words
A method of fabricating a corrosion resistant plastic-foam impregnated wire strand having corrosion resistant outer wires comprising: a. forming a core strand of ferrous metallic material, b. stranding an operation of corrosion resistant wires about the core strand, c. impregnating the strand with a foamable plastic composition; and d. foaming the plastic-foam composition to fill all the internal interstices of the strand with a flexible plastic-foam.
Claim 14
Independent Claim
99 words
A method of fabricating a plastic-foam impregnated wire rope having outer corrosion resistant wires comprising: a. forming a core of ferrous metal strands, b. stranding an outer operation of wire strands, having corrosion resistant wires stranded about the outer circumference of the strands, about the core of ferrous metal strands, c. impregnating the wire strands and the wire rope with a foamable plastic composition, and d. foaming the foamable plastic composition under the influence of induction heating of the component wires of the strands to fill all the internal interstices of the strands and rope with a flexible plastic-foam.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |