Patent US4003115A successfully refreshed from Google Patents.
US4003115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making centrifuge conveyor
Assignee: Baker Hughes Holdings LLC
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Filing: 1975-09-25
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Granted: 1977-01-18
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Expires: 1995-09-25
Abstract
Abstract A helical bladed conveyor for use in a centrifuge is provided with a wear-resistant outer foward edge by securing to the blade a thin band of metal having an upstanding marginal portion extending beyond the forward face and forming with it a cavity which is filled to the desired depth by fusing a wear-resistant material in place.
Inventors
- 👤 William F. Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:29
CPC Classifications
F; F04; F04D; F04D3/00; F04D3/02; B; B04; B04B; B04B1/00; B04B1/20; B04B1/2008; B23; B23P; B23P15/00; B23P15/04; F04D29/00; F04D29/18; F04D29/181; F04D29/22; F04D29/2261; F04D29/2294; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49826; Y10T29/49888
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
The method of providing a hard wear-resistant outer forward edge on at least a portion of a blade of a helical bladed centrifuge conveyor which comprises securing to a blade of said conveyor a band of metal having an upstanding marginal portion thereof extending beyond the forward face of said blade adjacent its outer edge to form with said forward face a cavity, said band defining the outer margin of said cavity, fusing a wear-resistant material at elevated temperature into said cavity to bond said material to said band and to said blade and to fill said cavity to the desired depth with said bonded wear-resistant material forming a portion of the forward face of said blade.
Claim 2
Independent Claim
117 words
The method of providing a hard wear-resistant outer forward edge on at least a portion of a blade of a helical bladed centrifuge conveyor which comprises securing to a blade of said conveyor a band of metal having an upstanding marginal portion thereof extending beyond the forward face of said blade adjacent its outer edge to form with said forward face a cavity, said band defining the outer margin of said cavity, fusing a wear-resistant material at elevated temperature into said cavity to bond said material to said band and to said blade and to fill said cavity to the desired depth with said bonded wear-resistant material forming a portion of the forward face of said blade.
Claim 3
Dependent Claim
39 words
The method as claimed in claim 1 in which the step of fusing the wear-resistant material is carried out by spraying said material in particulate form to bond said particles to each other and to said band and blade.
Claim 4
Dependent Claim
23 words
The method as claimed in claim 2 in which said band is secured in abutting relation to the outer edge of said blade.
Claim 5
Dependent Claim
31 words
The method as claimed in claim 2 in which said band is secured to said blade with its upstanding marginal portion spaced radially outwardly beyond the outer edge of said blade.
Claim 6
Dependent Claim
23 words
The method as claimed in claim 4 in which said band is secured in abutting relation to the rear face of said blade.
Claim 7
Dependent Claim
37 words
The method as claimed in claim 2 in which the band has a gauge of 0.030 to 0.060 inch and in which the outer marginal portion thereof is flared outwardly from the central axis of the blade.
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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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |