Patent US3204702A successfully refreshed from Google Patents.
US3204702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic variable pitch propeller
Assignee: Individual
•
Filing: 1964-05-04
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Granted: 1965-09-07
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:45
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A CONTROLLED TORQUE RANGE PROPELLER APPARATUS FOR AUTOMATIC OPERATION A LOW PITCH AND A HIGH PITCH POSITION COMPRISING: (A) A DRIVE SHAFT HAVING A REAR POTION, A HOLLOW HUB BLOCK FIXED TO THE SHAFT AT SAID PORTION AND FORMING A CHAMBER, (B) A PAIR OF OPPOSED PROPELLER BLADES EXTENDING RADIALLY OF SAID HUB BLOCK, SAID BLADES EACH HAVING A STEM EXTENDING THROUGH SAID HUB BLOCK AND INTO SAID CHAMBER, SAID BLADES EACH HAVING UNEQUAL REACTION SURFACES ROTATABLY URGING SAID BLADES TOWARD SAID LOW PITCH POSITION ROTATIONAL DRIVING OF SAID SHAFT, (C) BEARING MEANS ON SAID HUB BLOCK AND ENGAGING SAID STEMS FOR MOUNTING SAID BLADES AGAINST RADIAL MOVEMENT WHILE PERMITTING AXIAL ROTATION THEREOF, SAID STEMS FERMINATING WITHIN SAID CHAMBER IN RESPECTIVELY OPPOSED SPACED APART COAXIAL SPLINED END PORTIONS,
Claim 2
Dependent Claim
128 words
A CONTROLLED TORQUE RANGE PROPELLER APPARATUS FOR AUTOMATIC OPERATION A LOW PITCH AND A HIGH PITCH POSITION COMPRISING: (A) A DRIVE SHAFT HAVING A REAR POTION, A HOLLOW HUB BLOCK FIXED TO THE SHAFT AT SAID PORTION AND FORMING A CHAMBER, (B) A PAIR OF OPPOSED PROPELLER BLADES EXTENDING RADIALLY OF SAID HUB BLOCK, SAID BLADES EACH HAVING A STEM EXTENDING THROUGH SAID HUB BLOCK AND INTO SAID CHAMBER, SAID BLADES EACH HAVING UNEQUAL REACTION SURFACES ROTATABLY URGING SAID BLADES TOWARD SAID LOW PITCH POSITION ROTATIONAL DRIVING OF SAID SHAFT, (C) BEARING MEANS ON SAID HUB BLOCK AND ENGAGING SAID STEMS FOR MOUNTING SAID BLADES AGAINST RADIAL MOVEMENT WHILE PERMITTING AXIAL ROTATION THEREOF, SAID STEMS FERMINATING WITHIN SAID CHAMBER IN RESPECTIVELY OPPOSED SPACED APART COAXIAL SPLINED END PORTIONS,
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |