US4062484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion resistant filament wear guides and method of making same
Assignee: Surface Technology Corp
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Filing: 1975-08-13
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Granted: 1977-12-13
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Expires: 1995-08-13
Abstract
Abstract Filament wear guides which are characterized by excellent resistance to abrasive filament wear. Also, the method of their fabrication. A chromium surface on a substrate is controllably nitrided. Such nitriding is accomplished thermally. Resulting chromium nitride surface layer is non-particulate and substantially impervious.
Inventors
- 👤 John J. Rausch
- 👤 Ray J. Van Thyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:18
CPC Classifications
B; B65; B65H; B65H57/00; B65H57/24; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
A filament wear guide consisting essentially of: a. a substrate member in the form of the wear guide; b. a continuous, integral chromium interlayer on said substrate member at least in the area thereof to be contacted by a filament passing thereover; c. a surface supported on said chromium interlayer consisting of non-particulate, continuous thermally formed chromium nitride, said surface confirming to the shape of the surface of said chromium interlayer; and d. wherein the combined thickness of said chromium interlayer and said chromium nitride surface is at least 5 microinches.
Claim 2
Dependent Claim
91 words
A filament wear guide consisting essentially of: a. a substrate member in the form of the wear guide; b. a continuous, integral chromium interlayer on said substrate member at least in the area thereof to be contacted by a filament passing thereover; c. a surface supported on said chromium interlayer consisting of non-particulate, continuous thermally formed chromium nitride, said surface confirming to the shape of the surface of said chromium interlayer; and d. wherein the combined thickness of said chromium interlayer and said chromium nitride surface is at least 5 microinches.
Claim 3
Dependent Claim
24 words
The filament wear guide as defined in claim 1 wherein said surface consists of a chromium nitride zone from 0.1 to 4 mils thick.
Claim 4
Dependent Claim
53 words
A filament wear guide consisting essentially of a substrate member in the form of the wear guide, a composite structure on said substrate member at least in the area thereof to be contacted by a filament passing thereover formed by reaction of nitrogen along the fault boundaries in chromium electroplated on said substrate.
Claim 5
Dependent Claim
53 words
A filament wear guide consisting essentially of a substrate member in the form of the wear guide, a composite structure on said substrate member at least in the area thereof to be contacted by a filament passing thereover formed by reaction of nitrogen along the fault boundaries in chromium electroplated on said substrate.
References Cited (Backward Citations)
US3642517A
Cited
US3787229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |