US3267667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible flow fan
Assignee: General Electric Co
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Filing: 1964-06-25
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Granted: 1966-08-23
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Expires: 1984-06-25
Abstract
No abstract record available.
Inventors
- 👤 John R Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:48
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/04; F04D25/045; B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025; B64C29/0091; F02; F02K; F02K3/00; F02K3/02; F02K3/04; F02K3/068; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A REVERSIBLE FLOW FAN FOR ATTACHMENT TO AN AIRCRAFT FOR VERTICAL PROPULSION COMPRISING, AN AIRCRAFT SUPPORTING STRUCTURE HAVING A SUBSTANTIALLY VERTICAL DUCT THERETHROUGH, A HORIZONTAL DISC SUPPORTED ON AN AXIS FOR ROTATION WITHIN SAID DUCT, RADIALLY EXTENDING IMPULSE COMPRESSOR BLADES DISPOSED ABOUT THE DISC PERIPHERY, MEANS TO ROTATE SAID DISC, ROTATABLE CAMBERED AIRFOIL INLET GUIDE VANES SUPPORTED IN SAID DUCT ADJACENT TO AND UPSTREAM OF SAID BLADES, ROTATABLE CAMBERED AIRFOIL OUTLET GUIDE VANES SUPPORTED IN SAID DUCT ADJACENT TO AND DOWNSTREAM OF SAID BLADES, AND MEANS TO ROTATE SAID GUIDE VANES TO FORM INLET GUIDE VANES OF SAID OUTLET GUIDE VANES AND VICE VERSA WHEREBY AIR FLOW THROUGH SAID DUCT IS REVERSED.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |