US3253660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch propeller
Assignee: Individual
•
Filing: 1964-04-16
•
Granted: 1966-05-31
•
Expires: 1984-04-16
Abstract
No abstract record available.
Inventors
- 👤 Maker Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN A PROPELLER, A HUB, A PLURALITY OF BLADES MOUNTED FOR ROTATION ABOUT THEIR AXES ON SAID HUB, GEAR MEANS ON EACH SAID BLADE, A RING GEAR HAVING FACE TEETH ENGAGING THE TEETH OF SAID BLADES, A SET OF PLANET GEARS ON STUB SHAFTS IN ENGAGEMENT WITH THE INNER TEETH OF SAID RING GEAR, A FIXED SUN GEAR HAVING TEETH ENGAGED BY THE TEETH OF SAID PLANET GEARS FORMING A FIRST PLANET GEAR SET, A SECOND PLANET GEAR SET COMPRISING A RING GEAR SECURED TO SAID PROPELLER HUB HAVING TEETH IN MESH WITH THE TEETH OF A PLANET GEAR SET CARRIED BY THE STUB SHAFTS OF THE PLANET GEARS OF SAID FIRST SET, A MOVABLE SUN GEAR ENGAGING THE TEETH OF THE SECOND PLANET GEAR SET, AND MEANS ASSOCIATED WITH THE SUN GEAR OF THE SECOND PLANET GEAR SET FOR MOVING THE PLANET GEAR SET AND THE STUB SHAFTS TO THEREBY MOVE THE RING OF THE FIRST PLANET GEAR SET TO ROTATE THE BLADES ABOUT THEIR AXES.
Claim 2
Dependent Claim
167 words
IN A PROPELLER, A HUB, A PLURALITY OF BLADES MOUNTED FOR ROTATION ABOUT THEIR AXES ON SAID HUB, GEAR MEANS ON EACH SAID BLADE, A RING GEAR HAVING FACE TEETH ENGAGING THE TEETH OF SAID BLADES, A SET OF PLANET GEARS ON STUB SHAFTS IN ENGAGEMENT WITH THE INNER TEETH OF SAID RING GEAR, A FIXED SUN GEAR HAVING TEETH ENGAGED BY THE TEETH OF SAID PLANET GEARS FORMING A FIRST PLANET GEAR SET, A SECOND PLANET GEAR SET COMPRISING A RING GEAR SECURED TO SAID PROPELLER HUB HAVING TEETH IN MESH WITH THE TEETH OF A PLANET GEAR SET CARRIED BY THE STUB SHAFTS OF THE PLANET GEARS OF SAID FIRST SET, A MOVABLE SUN GEAR ENGAGING THE TEETH OF THE SECOND PLANET GEAR SET, AND MEANS ASSOCIATED WITH THE SUN GEAR OF THE SECOND PLANET GEAR SET FOR MOVING THE PLANET GEAR SET AND THE STUB SHAFTS TO THEREBY MOVE THE RING OF THE FIRST PLANET GEAR SET TO ROTATE THE BLADES ABOUT THEIR AXES.
References Cited (Backward Citations)
US1596511A
Cited
US1782167A
Cited
US1969280A
Cited
US1999091A
Cited
FR44980E
Cited
FR931944A
Cited
US2620887A
Cited
GB675767A
Cited
US3092186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |