US3124200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller device
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:43
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/007; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A DEVICE FOR PRODUCING AXIAL THRUST BY BEING ROTATED IN AIR, SAID DEVICE COMPRISING A SHAFT, A PLURALITY OF OUTWARDLY EXTENDING BLADES INCLINED TO THE PLANE NORMAL TO THE AXIS OF THEIR ROTATION AND SECURED TO SAID SHAFT FOR ROTATION THEREWITH, EACH OF SAID BLADES HAVING A LEADING EDGE AND A TRAILING EDGE, WITH SAID EDGES EXTENDING IN TWO SUBSTANTIALLY PARALLEL PLANES, WITH THE TRAILING EDGES OF SAID BLADES BEING EXTENDED IN A PLANE NORMAL TO THE AXIS OF SAID SHAFT TO FORM A DISC AND THEREBY TO CLOSE THE SPACES BETWEEN THE ADJACENT TRAILING EDGES BUT TO LEAVE OPENINGS IN SAID DISC, WITH EACH OF SAID OPENINGS EXTENDING FROM THE LINE OF PROJECTION OF THE LEADING EDGE OF THE RESPECTIVE BLADE ON SAID DISC SUBSTANTIALLY TO THE EDGE OF THE TRAILING EDGE AND TO THE PERIPHERAL EDGE OF SAID DISC, AND A FORWARDLY PROJECTING RIM PROVIDED ALONG THE CIRCULAR PERIPHERAL EDGE OF SAID DISC AND SEALINGLY SECURED THERETO WITH THE INNER SURFACES OF SAID RIM BEING CYLINDRICAL.
Claim 2
Independent Claim
168 words
A DEVICE FOR PRODUCING AXIAL THRUST BY BEING ROTATED IN AIR, SAID DEVICE COMPRISING A SHAFT, A PLURALITY OF OUTWARDLY EXTENDING BLADES INCLINED TO THE PLANE NORMAL TO THE AXIS OF THEIR ROTATION AND SECURED TO SAID SHAFT FOR ROTATION THEREWITH, EACH OF SAID BLADES HAVING A LEADING EDGE AND A TRAILING EDGE, WITH SAID EDGES EXTENDING IN TWO SUBSTANTIALLY PARALLEL PLANES, WITH THE TRAILING EDGES OF SAID BLADES BEING EXTENDED IN A PLANE NORMAL TO THE AXIS OF SAID SHAFT TO FORM A DISC AND THEREBY TO CLOSE THE SPACES BETWEEN THE ADJACENT TRAILING EDGES BUT TO LEAVE OPENINGS IN SAID DISC, WITH EACH OF SAID OPENINGS EXTENDING FROM THE LINE OF PROJECTION OF THE LEADING EDGE OF THE RESPECTIVE BLADE ON SAID DISC SUBSTANTIALLY TO THE EDGE OF THE TRAILING EDGE AND TO THE PERIPHERAL EDGE OF SAID DISC, AND A FORWARDLY PROJECTING RIM PROVIDED ALONG THE CIRCULAR PERIPHERAL EDGE OF SAID DISC AND SEALINGLY SECURED THERETO WITH THE INNER SURFACES OF SAID RIM BEING CYLINDRICAL.
References Cited (Backward Citations)
US595571A
Cited
US1072189A
Cited
US1541776A
Cited
US1966461A
Cited
US2270686A
Cited
US2138999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |