Patent US3211397A successfully refreshed from Google Patents.
US3211397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter with autorotative airfoil and torque-generating means
Assignee: Individual
•
Filing: 1962-09-26
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Granted: 1965-10-12
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Expires: 1982-09-26
Abstract
No abstract record available.
Inventors
- 👤 Laing Nikolaus
- 👤 Heidelberg Gotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:54
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/82; B64C23/00; B64C23/005; B64C27/04; B64C27/12; B64C27/16; B64C27/18; B64C27/32; B64C27/325; B64C27/54; B64C2027/8245; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A HELICOPTER COMPRISING: A FUSELAGE; A ROTARY AIRFOIL JOURNALED ON SAID FUSELAGE FOR ROTATION ABOUT A GENERALLY UPRIGHT FIRST AXIS IN A LIFT-GENERATING SENSE WHILE EXTENDING TRANSVERSELY TO SAID FIRST AXIS, SAID ROTARY AIRFOIL BEING HOLLOW AND PROVIDED WITH A TRAILING EDGE FORMED WITH AN OUTLET COMMUNICATING WITH THE INTERIOR OF SAID AIRFOIL FOR DISCHARGING A REARWARD JET OF A GASEOUS FLUID FOR ROTATING SAID AIRFOIL IN SAID SENSE; POWER MEANS ON SAID FUSELAGE FOR COMPRESSING SAID GASEOUS FLUID; CONDUIT MEANS COMMUNICATING BETWEEN SAID POWER MEANS AND SAID INTERIOR OF SAID AIRFOIL FOR SUPPLYING SAID GASEOUS FLUID TO SAID AIRFOIL FOR DISCHARGE THROUGH SAID OUTLET DURING POWERED ROTATION OF SAID AIRFOIL; TORQUE-GENERATING BLOWER MEANS JOURNALED ON SAID FUSELAGE FOR ROTATION ABOUT A SECOND AXIS AND OPERATIVELY CONNECTED TO SAID ROTARY AIRFOIL FOR SELECTIVE ROTATION THEREOF AND ROTATION THEREBY TO EXERT A TORQUE BE-
Claim 2
Dependent Claim
143 words
A HELICOPTER COMPRISING: A FUSELAGE; A ROTARY AIRFOIL JOURNALED ON SAID FUSELAGE FOR ROTATION ABOUT A GENERALLY UPRIGHT FIRST AXIS IN A LIFT-GENERATING SENSE WHILE EXTENDING TRANSVERSELY TO SAID FIRST AXIS, SAID ROTARY AIRFOIL BEING HOLLOW AND PROVIDED WITH A TRAILING EDGE FORMED WITH AN OUTLET COMMUNICATING WITH THE INTERIOR OF SAID AIRFOIL FOR DISCHARGING A REARWARD JET OF A GASEOUS FLUID FOR ROTATING SAID AIRFOIL IN SAID SENSE; POWER MEANS ON SAID FUSELAGE FOR COMPRESSING SAID GASEOUS FLUID; CONDUIT MEANS COMMUNICATING BETWEEN SAID POWER MEANS AND SAID INTERIOR OF SAID AIRFOIL FOR SUPPLYING SAID GASEOUS FLUID TO SAID AIRFOIL FOR DISCHARGE THROUGH SAID OUTLET DURING POWERED ROTATION OF SAID AIRFOIL; TORQUE-GENERATING BLOWER MEANS JOURNALED ON SAID FUSELAGE FOR ROTATION ABOUT A SECOND AXIS AND OPERATIVELY CONNECTED TO SAID ROTARY AIRFOIL FOR SELECTIVE ROTATION THEREOF AND ROTATION THEREBY TO EXERT A TORQUE BE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |