Patent US4267045A successfully refreshed from Google Patents.
US4267045A
Expired / Lapsed
US
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Labyrinth disk stack having disks with integral filter screens
Assignee: Babcock and Wilcox Co
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Filing: 1979-12-13
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Granted: 1981-05-12
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Expires: 1999-12-13
Abstract
Abstract A multi-turn labyrinth disk (10) is provided for a pressure reduction disk stack (12) which has an integral filter screen (34). The filter screen (34) comprises a series of small area passages (A 2 ) located on the periphery of the disk (10) which lead to a common high capacity radial passage (32) used to supply a series of multi-turn labyrinth paths (18).
Inventors
- 👤 Robert G. Hoof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:25
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/22; B01D25/26; B01D29/00; B01D29/44; B01D29/46; B01D45/00; B01D45/04; B01D45/06; F; F16; F16K; F16K47/00; F16K47/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759; Y10T137/86791
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
205 words
A device for subjecting particulate fluid flow to a labyrinth passage between the inlet and outlet of the device comprising: a multi-turn labyrinth disk stack with integral inlet filter having a series of disks with inlet and outlet circumferences forming the inlet and outlet of said disk stack; means for allowing fluid flow in the device to flow from the inlet circumference of the disk stack to the outlet circumference of the disk stack; each disk of said series having a series of small area openings located around the entire inlet circumference of said disk forming an inlet filter for the particulate fluid flow through the device and leading to a large circumferential passageway; each of said series of disks having a series of multi-turn passages located proximately to said large circumferential passageway, each multi-turn passage having a substantially constant area significantly larger than the area of each of said series of circumferential passages to prevent the blocking of the passageway by a particle of the particulate fluid flow passing through the inlet filter of said disk; and outlet means located on each of said series of disks proximate to said multi-turn passages to exhaust the particulate fluid from the disk stack of the device.
Claim 2
Independent Claim
205 words
A device for subjecting particulate fluid flow to a labyrinth passage between the inlet and outlet of the device comprising: a multi-turn labyrinth disk stack with integral inlet filter having a series of disks with inlet and outlet circumferences forming the inlet and outlet of said disk stack; means for allowing fluid flow in the device to flow from the inlet circumference of the disk stack to the outlet circumference of the disk stack; each disk of said series having a series of small area openings located around the entire inlet circumference of said disk forming an inlet filter for the particulate fluid flow through the device and leading to a large circumferential passageway; each of said series of disks having a series of multi-turn passages located proximately to said large circumferential passageway, each multi-turn passage having a substantially constant area significantly larger than the area of each of said series of circumferential passages to prevent the blocking of the passageway by a particle of the particulate fluid flow passing through the inlet filter of said disk; and outlet means located on each of said series of disks proximate to said multi-turn passages to exhaust the particulate fluid from the disk stack of the device.
Claim 3
Dependent Claim
37 words
A disk stack as set forth in claim 1 wherein said outlet means on each of said series of disks includes a pressure equalization passageway radially extending proximate to the outlet of said series of multi-turn labyrinths.
Claim 4
Dependent Claim
37 words
A disk stack as set forth in claim 1 wherein the area of said multi-turn labyrinth passages of each of said series of disks is significantly less than the total area of the series of small openings.
Claim 5
Dependent Claim
36 words
A disk stack as set forth in claim 3 wherein on each of said series of disks the area of said large circumferential passage is significantly larger than the area of one of said multi-turn passages.
Claim 6
Dependent Claim
45 words
A disk stack as set forth in claim 4 wherein on each of said series of disks said multi-turn passages are formed by lands extending from the surface of said disk to a common height to allow a flat surface to seal the passageways therebetween.
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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |