Patent US1761922A successfully refreshed from Google Patents.
Patent US5014760A successfully refreshed from Google Patents.
US5014760A
Expired / Lapsed
US
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Steel wire for reinforcing elastomer articles with improved adhesion promoting layer
Assignee: Individual
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Filing: 1987-01-16
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Granted: 1991-05-14
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Expires: 2007-01-16
Abstract
Abstract High strength steel wire for use e.g. in tire reinforcement is treated so as to have a cementite free surface region. This can be achieved by electroplating or other coating methods, or be decarburizing the surface. The wire has increased resistance to hydrogen embrittlement and corrosion fatigue. The wire with its ferrous surface region is then covered with a rubber adherent outer layer of e.g. brass.
Inventors
- 👤 Martin Bombeke
- 👤 Paul Dambre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:25
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0606; D07B1/066; B; B60; B60C; B60C9/00; B60C9/0007; C; C21; C21D; C21D3/00; C21D3/02; C21D3/04; C21D9/00; C21D9/52; C21D9/525; C23; C23C; C23C28/00; C23C28/02; C23C28/021; C23C28/023; D07B1/0666; D07B2205/00; D07B2205/30; D07B2205/3021; D07B2205/3025; D07B2205/3035; D07B2205/3085; D07B2205/3089; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10S57/00; Y10S57/902; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12562; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917; Y10T428/12924
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
A steel wire for reinforcement of vulcanized elastomers drawn form carbon steel with a carbon content of at least 0.4% and a tensile strength of at least 2000 N/mm 2 , the wire having a core of a work-hardened essentially pearlitic microstructure and an outer layer able to adhere to rubber, characterized in that said wire core is provided underneath said outer layer with a continuous surface region which is ferrous and substantially free of cementite and other precipitated phases, the surface region extending throughout for a depth of at least 0.5 μm and further characterized in that the rubber adherent layer is a brass layer.
Claim 2
Dependent Claim
106 words
A steel wire for reinforcement of vulcanized elastomers drawn form carbon steel with a carbon content of at least 0.4% and a tensile strength of at least 2000 N/mm 2 , the wire having a core of a work-hardened essentially pearlitic microstructure and an outer layer able to adhere to rubber, characterized in that said wire core is provided underneath said outer layer with a continuous surface region which is ferrous and substantially free of cementite and other precipitated phases, the surface region extending throughout for a depth of at least 0.5 μm and further characterized in that the rubber adherent layer is a brass layer.
Claim 3
Dependent Claim
22 words
A wire as claimed in claim 1 characterized in that the surface region is applied to the steel wire as a coating.
Claim 4
Dependent Claim
17 words
A wire as claimed in claim 2, characterized in that the coating consists of substantially pure iron.
Claim 5
Dependent Claim
21 words
A wire as claimed in claim 3, characterized in that said coating is metallurgically diffusion bonded to the harder wire core.
Claim 6
Dependent Claim
22 words
A steel wire as claimed in claim 1 characterized in that the depth of the surface region is up to 5 μm.
Claim 7
Dependent Claim
23 words
A wire as claimed in claim 1, characterized in that the wire has a tensile strength of at least 3000 N/mm -2 .
Claim 8
Dependent Claim
13 words
An elastomeric article reinforced by a steel cord as claimed in claim 1.
Claim 9
Dependent Claim
14 words
An article as claimed in claim 7, in the form of a vehicle tire.
References Cited (Backward Citations)
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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) | 1994-05-13 | 1994-11-12 | 1995-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-13 | 1998-11-12 | 1999-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-13 | 2002-11-12 | 2003-05-14 | $7700.00 | Window Closed / Lapsed |