US4004615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parts subject to wear in separators, cyclones, pipelines and similar apparatus
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1975-02-04
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Granted: 1977-01-25
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Expires: 1995-02-04
Abstract
Abstract Wear members in separators, cyclones, pipelines and similar apparatus, which are abrasively worn by a particle-conducting flow, said wear members having increased durability as a result of increased surface roughness.
Inventors
- 👤 Hans Stern, deceased
- 👤 Werner Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:46
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/002; F15D1/0025; F15D1/003; F15D1/0035; F15D1/0045; B; B04; B04C; B04C5/00; B04C5/08; B04C5/085; F15D1/02; F15D1/06; F16; F16L; F16L57/00; F16L57/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12153; Y10T428/12389; Y10T428/12396
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
In apparatus in which there is a particle-conducting flow, such as separators, cyclones, pipelines and similar apparatus, and where a part of said apparatus, designated wear members, is in contact with said particle-conducting flow and is abrasively worn by said particle-conducting flow, the improvement comprising a plurality of spaced depressions in said contact surface of said wear member producing an increase in the macro surface roughness above a roughness depth of 0.1 mm, of the wear member and forming a flow-marginal layer at the surface of the wear member spacing the abrasive particles in the flow from the surface of the wear member and in which layer entrained particles sink downwardly at reduced velocity with reduced abrasive effect.
Claim 2
Dependent Claim
118 words
In apparatus in which there is a particle-conducting flow, such as separators, cyclones, pipelines and similar apparatus, and where a part of said apparatus, designated wear members, is in contact with said particle-conducting flow and is abrasively worn by said particle-conducting flow, the improvement comprising a plurality of spaced depressions in said contact surface of said wear member producing an increase in the macro surface roughness above a roughness depth of 0.1 mm, of the wear member and forming a flow-marginal layer at the surface of the wear member spacing the abrasive particles in the flow from the surface of the wear member and in which layer entrained particles sink downwardly at reduced velocity with reduced abrasive effect.
Claim 3
Dependent Claim
30 words
Apparatus having wear member according to claim 1 wherein said depressions constitute a multiplicity of elongated means extending transversely to the direction of flow in offset relationship one to another.
Claim 4
Dependent Claim
25 words
Apparatus having wear member according to claim 2 wherein said multiplicity of elongated means are formed as slots in the surface of the wear members.
Claim 5
Dependent Claim
23 words
Wear member according to claim 2 wherein said multiplicity of elongated means are formed as ribs on the surface of the wear members.
Claim 6
Dependent Claim
22 words
Apparatus having wear member according to claim 2 wherein said elongated means have a length-to-width ratio of from substantially 4:1 to 8:1.
Claim 7
Dependent Claim
15 words
Apparatus having wear member according to claim 2 wherein said elongated means have rounded edges.
Claim 8
Dependent Claim
13 words
Wear member according to claim 2 wherein said elongated means have beveled edges.
Claim 9
Dependent Claim
16 words
Apparatus having wear member according to claim 2 wherein said elongated means have a strain-hardened surface.
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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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |