Patent US3185181A successfully refreshed from Google Patents.
US3185181A
Expired / Lapsed
US
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Diffuser swirl eliminator
Assignee: Research Cottrell Inc
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Filing: 1962-12-13
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Granted: 1965-05-25
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Expires: 1982-12-13
Abstract
No abstract record available.
Inventors
- 👤 Charles W Demyan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:31
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/66; F04D29/661; F04D29/667; Y; Y10; Y10S; Y10S55/00; Y10S55/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
GAS FLOW CONTROL MEANS FOR A SUBSONIC GAS FLOW PASSAGE INCLUDING A SUBSONIC WIDE-ANGLE DIVERGENT DIFFUSER AND AN INLET PASSAGE THEREFOR, A PLURALITY OF PLANAR GAS FLOW CONTROL VANES MOUNTED IN SAID INLET PASSAGE WITH THE PLANE FACES OF THE VANES POSITIONED IN PARALLEL SPACED RELATIONSHIP TO EACH OTHER AND EXTENDING IN PLANES PARALLEL TO A PLANE INCLUDING THE LONGITUDINAL AXIS OF THE INLET PASSAGE A PREDETERMINED DISTANCE SUCH THAT THE RATIO OF SAID DISTANCE TO THE INTERVANE SPACING IS SUBSTANTIALLY EQUAL TO THE RECIPROCAL OF THE TANGENT OF THE APPROACH ANGLE OF THE FLOW OF GAS TO THE FACES OF THE VANES.
Claim 2
Dependent Claim
103 words
GAS FLOW CONTROL MEANS FOR A SUBSONIC GAS FLOW PASSAGE INCLUDING A SUBSONIC WIDE-ANGLE DIVERGENT DIFFUSER AND AN INLET PASSAGE THEREFOR, A PLURALITY OF PLANAR GAS FLOW CONTROL VANES MOUNTED IN SAID INLET PASSAGE WITH THE PLANE FACES OF THE VANES POSITIONED IN PARALLEL SPACED RELATIONSHIP TO EACH OTHER AND EXTENDING IN PLANES PARALLEL TO A PLANE INCLUDING THE LONGITUDINAL AXIS OF THE INLET PASSAGE A PREDETERMINED DISTANCE SUCH THAT THE RATIO OF SAID DISTANCE TO THE INTERVANE SPACING IS SUBSTANTIALLY EQUAL TO THE RECIPROCAL OF THE TANGENT OF THE APPROACH ANGLE OF THE FLOW OF GAS TO THE FACES OF THE VANES.
References Cited (Backward Citations)
US2182690A
Cited
US2788719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |