US3834149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvements in wire ropes, strands and wire ropes produced therefrom
Assignee: H & T MARLOW Ltd SOUTH ROAD HAILSHAM EAST SUSSEX BN27 3JS
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Filing: 1972-11-28
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Granted: 1974-09-10
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Expires: 1992-11-28
Abstract
Abstract The invention relates to the construction of wire rope strands and ropes produced therefrom in which each strand is constructed in known manner from steel wires but includes at least one control element in the form of a metallic zinc or aluminium element which may be in the form of a wire or wires or a foil wrapping or coating to prevent or reduce oxidation of the steel wires, the control element being conductively in contact with the steel wires and being surrounded by steel wires to protect it against abrasion.
Inventors
- 👤 A Nisbet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:15
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/14; D07B1/06; D07B1/0673; D07B1/0693; D07B2401/00; D07B2401/20; D07B2401/202; D07B2401/2025
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
A plurality of steel wire strands laid in known manner to form a wire rope, each strand comprising a plurality of steel wire components and at least one control element, said steel wire components and control elements laid in known manner, said control elements so arranged in said strand that each steel wire component is conductively in contact with an associated control element which is surrounded by steel wire components, said wire rope having a core of wire rope surrounded by a foil control element.
Claim 2
Dependent Claim
92 words
A wire rope strand comprising a plurality of steel wire components and at least one control element, said steel wire components and control elements laid together in known manner to form a strand, said control elements so arranged in the strand that each steel wire component is conductively in contact with an associated control element, said control elements enveloped by steel wire components, said control elements formed from one of a group of non-ferrous metals consisting of zinc and aluminium and at least one of said control elements comprising a wire element.
Claim 3
Dependent Claim
24 words
A wire rope strand as claimed in claim 3 wherein one of said control elements comprises a foil of one of said non-ferrous metals.
Claim 4
Dependent Claim
40 words
A wire rope strand as claimed in claim 3 wherein one of said control elements comprises a coating of one of said non-ferrous metals applied to the outer surface of an inner layer of steel wire components in said strand.
Claim 5
Dependent Claim
18 words
A wire rope strand as claimed in claim 3 wherein said steel wire components are galvanized steel wires.
Claim 6
Dependent Claim
34 words
A wire rope strand as claimed in claim 3 wherein one of the control elements comprises a plurality of wire elements laid between two adjacent layers of steel wire components as an additional layer.
Claim 7
Dependent Claim
105 words
A plurality of wire rope strands laid in known manner to form a wire rope, each strand comprising a plurality of steel wire components and at least one control element, said steel wire components and control elements laid together in known manner to form a strand, said control elements so arranged in each strand that each steel wire component is conductively in contact with an associated control element, said control elements enveloped by said steel wire components, said control elements formed one of a group of non-ferrous metals consisting of zinc and aluminium and at least one of said control elements comprising a wire element.
Claim 8
Dependent Claim
19 words
A wire rope as claimed in claim 8 wherein said rope has a core element comprising a fibre rope.
Claim 9
Dependent Claim
19 words
A wire rope as claimed in claim 8 wherein said rope has a core element comprising a wire rope.
Claim 10
Dependent Claim
34 words
A wire rope as claimed in claim 8 wherein said rope has a core element comprising a wire rope covered by a control element formed by a foil in one of said non-ferrous metals.
References Cited (Backward Citations)
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Cited
US3295310A
Cited
US3293837A
Cited
US3358435A
Cited
US3352098A
Cited
US3307343A
Cited
US3468119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |