US3117744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary wing alighting devices
Assignee: Individual
•
Filing: 1960-02-15
•
Granted: 1964-01-14
•
Expires: 1980-02-15
Abstract
No abstract record available.
Inventors
- 👤 Alfred I Roman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:28
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/02; B64C39/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A ROTARY-WING ALIGHTING DEVICE COMPRISING A HUB, A STRUCTURAL MEMBER ROTATABLY SUPPORTING SAID HUB, MEANS FOR INITIATING ROTATION OF SAID HUB, MEANS FOR ACTUATING SAID HUB ROTATING MEANS, AT LEAST ONE RETRACTABLE AIRFOIL HAVING LITHE SPAN-WISE AND STIFF CHORDWISE CONSTRUCTION EXTENDING FROM SAID HUB AND SECURED, AT ITS INBOARD END, TO MEANS COUNTERACTED BY CENTRIFUGAL FORCE FOR PERMITTING SAID AIRFOIL TO PROGRESSIVELY EXTEND FROM SAID HUB AS THE CENTRIFUGAL FORCE INCREASES, AND FOR RETRACTING SAID AIRFOIL AS SAID CENTRIFUGAL FORCE DECREASES, AND MEANS FOR ATTACHING SAID STRUCTURAL MEMBER TO THE BODY OF THE ALIGHTING PERSON.
Claim 2
Dependent Claim
95 words
A ROTARY-WING ALIGHTING DEVICE COMPRISING A HUB, A STRUCTURAL MEMBER ROTATABLY SUPPORTING SAID HUB, MEANS FOR INITIATING ROTATION OF SAID HUB, MEANS FOR ACTUATING SAID HUB ROTATING MEANS, AT LEAST ONE RETRACTABLE AIRFOIL HAVING LITHE SPAN-WISE AND STIFF CHORDWISE CONSTRUCTION EXTENDING FROM SAID HUB AND SECURED, AT ITS INBOARD END, TO MEANS COUNTERACTED BY CENTRIFUGAL FORCE FOR PERMITTING SAID AIRFOIL TO PROGRESSIVELY EXTEND FROM SAID HUB AS THE CENTRIFUGAL FORCE INCREASES, AND FOR RETRACTING SAID AIRFOIL AS SAID CENTRIFUGAL FORCE DECREASES, AND MEANS FOR ATTACHING SAID STRUCTURAL MEMBER TO THE BODY OF THE ALIGHTING PERSON.
References Cited (Backward Citations)
NL79305C
Cited
US1640549A
Cited
US2226978A
Cited
FR800738A
Cited
US2425353A
Cited
US2471687A
Cited
US2491042A
Cited
US2614636A
Cited
US2738021A
Cited
US2969211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |