US3885884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for providing an aerodynamic window
Assignee: United States Department of the Air Force
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Filing: 1974-05-09
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Granted: 1975-05-27
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Expires: 1994-05-09
Abstract
Abstract An apparatus for maintaining a pressure differential across an aperture between two volumes of different pressure having a circular impeller within a chamber of a circular housing with the outer circular wall of the housing being spaced a predetermined distance from the periphery of the impeller. The circular chamber is positioned between two volumes at different pressures. A flow splitter is positioned adjacent the periphery of the impeller near the aerodynamic window. A first set of vanes near the aerodynamic window directs the gas flow toward the high pressure volume. The differential pressure between the volumes turns the gas flow back in the direction of the low pressure volume. A second set of vanes directs the gas flow into the circular annulus around the impeller.
Inventors
- 👤 David B Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:07
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/034; H01S3/0343; F; F04; F04D; F04D25/00; F04D25/02; F04D25/04; F04D25/045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
An apparatus for maintaining a pressure difference across an opening between a high prEssure region and a low pressure region, comprising: a housing having two spaced flat walls and a circular wall interconnecting said flat walls; a first aperture in one of said flat walls adjacent said circular wall; a second aperture in the other flat wall in alignment with said first aperture; means for connecting one of said pressure regions to said first aperture; means for providing a flow of gas along a path within said housing, adjacent said circular wall and past said apertures; means, in the gas flow path on one side of said apertures for directing the gas flow toward the aperture adjacent the high pressure region; and means, in the gas flow path on the other side of said apertures, for redirecting the gas flow into the gas flow path adjacent the circular wall within said housing.
Claim 2
Independent Claim
152 words
An apparatus for maintaining a pressure difference across an opening between a high prEssure region and a low pressure region, comprising: a housing having two spaced flat walls and a circular wall interconnecting said flat walls; a first aperture in one of said flat walls adjacent said circular wall; a second aperture in the other flat wall in alignment with said first aperture; means for connecting one of said pressure regions to said first aperture; means for providing a flow of gas along a path within said housing, adjacent said circular wall and past said apertures; means, in the gas flow path on one side of said apertures for directing the gas flow toward the aperture adjacent the high pressure region; and means, in the gas flow path on the other side of said apertures, for redirecting the gas flow into the gas flow path adjacent the circular wall within said housing.
Claim 3
Dependent Claim
28 words
The device as recited in claim 1 wherein said first aperture is connected to said low pressure region and said gas flow is directed toward said second aperture.
Claim 4
Dependent Claim
43 words
The device as recited in claim 2 wherein said means for providing a flow of gas along a path adjacent said circular wall includes a peripheral gas impeller within the housing with the periphery of said impeller being spaced from said circular wall.
Claim 5
Dependent Claim
60 words
The device as recited in claim 3 wherein said means for directing the gas flow toward said second aperture includes a plurality of vanes positioned on one side of said apertures and said means for redirecting the gas flow into the gas flow path within said housing includes a plurality of vanes positioned on the other side of said apertures.
Claim 6
Dependent Claim
31 words
The device as recited in claim 4 wherein a flow splitter is positioned near the periphery of said impeller adjacent said apertures; said vane members being secured to said flow splitter.
References Cited (Backward Citations)
US2824232A
Cited
US3348766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |