Patent US3957652A successfully refreshed from Google Patents.
US3957652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pocket screen assemblies for centrifugal separators and replacement therefor
Assignee: H BUD ALBRIGHT
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Filing: 1975-05-12
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Granted: 1976-05-18
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Expires: 1995-05-12
Abstract
Abstract Milled screen units can be tack welded to existing pockets after the conventional screen has been removed or can be recessed into the top of modified pockets and tack welded. In both cases the construction of the screen unit permits minimal tack welding thus obviating the change in metallurgical structure normally present thereby reducing chemical fretting when used with active solutions and/or abrasive particles. The screen is formed from a cylinder in which the slits are milled. The sections are then cut from the cylinder and flattened so that the slits take up a cross sectional configuration having a narrow width on one side and gradually widening towards the other side thus preventing clogging during use.
Inventors
- 👤 Ian McGonigal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:40
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/4609; B07B1/4618; B01; B01D; B01D39/00; B01D39/10; B04; B04B; B04B7/00; B04B7/08; B04B7/18; B07B1/469
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A pocket screen assembly for centrifugal separators and the like comprising in combination a screen holding pocket component having a pair of spaced and parallel side walls, a pair of spaced and parallel end walls and a perimetrical flange extending outwardly from the lower edges of said walls, a plurality of screen unit supports spanning said walls internally, a screen unit detachably engageable within the open top of said pocket component and supported by said screen unit supports, and means to hold said unit in said detachable relationship partially recessed within said open top of said pocket component, said screen unit comprising a one piece arcuately curved plate substantially rectangular when viewed in plan and having an inner surface and an outer surface and a plurality of spaced and parallel slits milled through said plate, the cross sectional dimension of said slits increasing from said inner surface to said outer surface, said plate having a plurality of transverse abutments formed on the outer surface thereof engageable upon said screen unit supports.
Claim 2
Dependent Claim
171 words
A pocket screen assembly for centrifugal separators and the like comprising in combination a screen holding pocket component having a pair of spaced and parallel side walls, a pair of spaced and parallel end walls and a perimetrical flange extending outwardly from the lower edges of said walls, a plurality of screen unit supports spanning said walls internally, a screen unit detachably engageable within the open top of said pocket component and supported by said screen unit supports, and means to hold said unit in said detachable relationship partially recessed within said open top of said pocket component, said screen unit comprising a one piece arcuately curved plate substantially rectangular when viewed in plan and having an inner surface and an outer surface and a plurality of spaced and parallel slits milled through said plate, the cross sectional dimension of said slits increasing from said inner surface to said outer surface, said plate having a plurality of transverse abutments formed on the outer surface thereof engageable upon said screen unit supports.
Claim 3
Dependent Claim
39 words
The assembly according to claim 1 in which said supports include a bar secured to each end wall and extending therealong and a central bar secured to each side wall and extending therebetween parallel to said first mentioned bar.
Claim 4
Dependent Claim
33 words
The assembly according to claim 1 in which said abutments include one at each end thereof and one extending across said plate intermediate said end abutments and in spaced and parallel relationship therewith.
Claim 5
Dependent Claim
122 words
In a pocket screen assembly for centrifugal separators and the like which includes a screen holding pocket component having a pair of spaced and parallel side walls, a pair of spaced and parallel end walls and a perimetrical flange extending outwardly from the lower edges of said walls; a screen unit for said assembly, said screen unit comprising a one piece arcuately curved plate substantially rectangular when viewed in plan and a plurality of spaced and parallel slits milled through the surface of said plate, the cross sectional dimension of said slits increasing from one side to the other side of said unit, said plate having a plurality of transverse abutments formed on the underside thereof engageable upon the associated screen unit.
Claim 6
Dependent Claim
122 words
In a pocket screen assembly for centrifugal separators and the like which includes a screen holding pocket component having a pair of spaced and parallel side walls, a pair of spaced and parallel end walls and a perimetrical flange extending outwardly from the lower edges of said walls; a screen unit for said assembly, said screen unit comprising a one piece arcuately curved plate substantially rectangular when viewed in plan and a plurality of spaced and parallel slits milled through the surface of said plate, the cross sectional dimension of said slits increasing from one side to the other side of said unit, said plate having a plurality of transverse abutments formed on the underside thereof engageable upon the associated screen unit.
Claim 7
Dependent Claim
44 words
The screen unit according to claim 4 which includes an abutment formed transversely at each end of said plate and upon the underside thereof and a further abutment formed transversely upon the underside of said plate intermediate said first mentioned abutments and parallel thereto.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |