US3150823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusers
Assignee: Associated Electrical Industries Ltd
•
Filing: 1963-02-07
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Granted: 1964-09-29
•
Expires: 1983-02-07
Abstract
No abstract record available.
Inventors
- 👤 Adams Thomas Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:36
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/441; F04D29/444; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A DIFFUSER FOR USE WITH A CENTRIFUGAL COMPRESSOR COMPRISING A CASING, SURFACES TO SAID CASING DEFINING A PLURALITY OF CHANNELS EACH OF SUBSTANTIALLY RECTANGULAR CROSS SECTION, AND A COLLECTOR REGION AND A DIFFUSER REGION, AS DEFINED, TO EACH CHANNEL, THE RATIO OF THE LENGTHS OF THE CIRCUMFERENTIAL SIDE AND THE AXIAL SIDE, AS DEFINE, OF THE INPUT END OF THE COLLECTOR REGION BEING GREATER THAN THE RATIO OF THE LENGTHS OF THE TWO CORRESPONDING SIDES OF THE INPUT END OF THE DIFFUSER REGION, AND THE MEAN RATE OF INCREASE IN THE DIRECTION OF MEAN FLUID FLOW OF THE LENGTH OF THE AXIAL SIDE OF EACH CHANNEL BEING GREATER IN THE COLLECTOR REGION THAN IN THE DIFFUSER REGION.
Claim 2
Dependent Claim
117 words
A DIFFUSER FOR USE WITH A CENTRIFUGAL COMPRESSOR COMPRISING A CASING, SURFACES TO SAID CASING DEFINING A PLURALITY OF CHANNELS EACH OF SUBSTANTIALLY RECTANGULAR CROSS SECTION, AND A COLLECTOR REGION AND A DIFFUSER REGION, AS DEFINED, TO EACH CHANNEL, THE RATIO OF THE LENGTHS OF THE CIRCUMFERENTIAL SIDE AND THE AXIAL SIDE, AS DEFINE, OF THE INPUT END OF THE COLLECTOR REGION BEING GREATER THAN THE RATIO OF THE LENGTHS OF THE TWO CORRESPONDING SIDES OF THE INPUT END OF THE DIFFUSER REGION, AND THE MEAN RATE OF INCREASE IN THE DIRECTION OF MEAN FLUID FLOW OF THE LENGTH OF THE AXIAL SIDE OF EACH CHANNEL BEING GREATER IN THE COLLECTOR REGION THAN IN THE DIFFUSER REGION.
References Cited (Backward Citations)
GB152689A
Cited
GB170815A
Cited
GB253302A
Cited
US1745854A
Cited
US2609141A
Cited
US2658338A
Cited
US2900126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |