US3158338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustaining airfoils having variable configurations to vary lift characteristics
Assignee: Individual
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Filing: 1963-02-18
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Granted: 1964-11-24
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Expires: 1983-02-18
Abstract
No abstract record available.
Inventors
- 👤 Walton W Cushman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:15
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/467; B64C3/00; B64C3/38; B64C3/44; B64C3/46; B64C27/54; B64C27/72; B64C2027/7205; B64C2027/7211; B64C2027/7222; Y; Y02; Y02T; Y02T50/00; Y02T50/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
IN A SUSTAINING AIRFOIL FOR ENGINE DRIVEN AIRCRAFT INCLUDING UPPER AND LOWER SURFACES AND HAVING AN AERODYNAMIC CROSS SECTIONAL CONFIGURATION, A FLEXIBLE SUPPLEMENTAL AIRFOIL SURFACE MOUNTED IN OVERLYING RELATION ON THE UPPER SURFACE ONLY OF SAID SUSTAINING AIRFOIL, SAID SUPPLEMENTAL AIRFOIL BEING DISTENDABLE IN RESPONSE TO DIFFERENTIAL PRESSURE ON OPPOSITE SIDES THEREOF CREATED BY MOVEMENT OF THE SUSTAINING AIRFOIL THROUGH A FLUID MEDIUM TO CAUSE RELATIVE MOVEMENT BETWEEN THE SAME AND THE UPPER SURFACE OF SAID SUSTAINING AIRFOIL, AND VACUUM CONTROL MEANS IN COMMUNICATION WITH THE UNDER SIDE OF SAID FLEXIBLE SUPPLEMENTAL AIRFOIL AND OPERABLE TO REGULATE THE RELATIVE MOVEMENT BETWEEN SAID SUPPLEMENTAL AIRFOIL AND THE UPPER SURFACE OF SAID SUSTAINING AIRFOIL TO CHANGE THE AERODYNAMIC CROSS SECTIONAL CONFIGURATION AND LIFT CHARACTERISTICS OF SAID SUSTAINING AIRFOIL.
Claim 2
Dependent Claim
126 words
IN A SUSTAINING AIRFOIL FOR ENGINE DRIVEN AIRCRAFT INCLUDING UPPER AND LOWER SURFACES AND HAVING AN AERODYNAMIC CROSS SECTIONAL CONFIGURATION, A FLEXIBLE SUPPLEMENTAL AIRFOIL SURFACE MOUNTED IN OVERLYING RELATION ON THE UPPER SURFACE ONLY OF SAID SUSTAINING AIRFOIL, SAID SUPPLEMENTAL AIRFOIL BEING DISTENDABLE IN RESPONSE TO DIFFERENTIAL PRESSURE ON OPPOSITE SIDES THEREOF CREATED BY MOVEMENT OF THE SUSTAINING AIRFOIL THROUGH A FLUID MEDIUM TO CAUSE RELATIVE MOVEMENT BETWEEN THE SAME AND THE UPPER SURFACE OF SAID SUSTAINING AIRFOIL, AND VACUUM CONTROL MEANS IN COMMUNICATION WITH THE UNDER SIDE OF SAID FLEXIBLE SUPPLEMENTAL AIRFOIL AND OPERABLE TO REGULATE THE RELATIVE MOVEMENT BETWEEN SAID SUPPLEMENTAL AIRFOIL AND THE UPPER SURFACE OF SAID SUSTAINING AIRFOIL TO CHANGE THE AERODYNAMIC CROSS SECTIONAL CONFIGURATION AND LIFT CHARACTERISTICS OF SAID SUSTAINING AIRFOIL.
Claim 3
Dependent Claim
120 words
IN AN ENGINE DRIVEN AIRCRAFT HAVING A ROTARY HUB AND SUSTAINING AIRFOILS THE COMBINATION INCLUDING FLEXIBLE DISTENDABLE SUPPLEMENTAL AIRFOILS MOUNTED ON SAID SUSTAINING AIRFOILS, VACUUM INDUCED MEANS TO PRODUCE A PRESSURE DIFFERENTIAL ON OPPOSITE SIDE OF SAID SUPPLEMENT AIRFOILS TO NORMALLY MAINTAIN THE SAME IN CONTACT WITH THE SUSTAINING AIRFOILS DURING ROTATION THEREOF, MEANS TO CONTROL THE PRESSURE DIFFERENTIAL ON THE OPPOSITE SIDES OF SAID SUPPLEMENTAL AIRFOIL TO ALLOW CONTROLLED DISTENTION THEREOF, SAID ROTARY HUB AND SUSTAINING AIRFOILS TILTABLE TO CONTROL THE DIRECTION OF FLIGHT OF THE AIRCRAFT, AND SAID PRESSURE DIFFERENTIAL PRODUCING VACUUM INDUCED MEANS RESPONSIVE TO THE MOVEMENT OF FLIGHT OF THE AIRCRAFT AND THE MOVEMENT OF SAID SUSTAINING AIRFOILS TO EFFECT CYCLIC DISTENTION OF SAID SUPPLEMENTAL AIRFOILS.
Claim 4
Dependent Claim
120 words
IN AN ENGINE DRIVEN AIRCRAFT HAVING A ROTARY HUB AND SUSTAINING AIRFOILS THE COMBINATION INCLUDING FLEXIBLE DISTENDABLE SUPPLEMENTAL AIRFOILS MOUNTED ON SAID SUSTAINING AIRFOILS, VACUUM INDUCED MEANS TO PRODUCE A PRESSURE DIFFERENTIAL ON OPPOSITE SIDE OF SAID SUPPLEMENT AIRFOILS TO NORMALLY MAINTAIN THE SAME IN CONTACT WITH THE SUSTAINING AIRFOILS DURING ROTATION THEREOF, MEANS TO CONTROL THE PRESSURE DIFFERENTIAL ON THE OPPOSITE SIDES OF SAID SUPPLEMENTAL AIRFOIL TO ALLOW CONTROLLED DISTENTION THEREOF, SAID ROTARY HUB AND SUSTAINING AIRFOILS TILTABLE TO CONTROL THE DIRECTION OF FLIGHT OF THE AIRCRAFT, AND SAID PRESSURE DIFFERENTIAL PRODUCING VACUUM INDUCED MEANS RESPONSIVE TO THE MOVEMENT OF FLIGHT OF THE AIRCRAFT AND THE MOVEMENT OF SAID SUSTAINING AIRFOILS TO EFFECT CYCLIC DISTENTION OF SAID SUPPLEMENTAL AIRFOILS.
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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |