Patent US3275083A successfully refreshed from Google Patents.
US3275083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch propeller
Assignee: Individual
•
Filing: 1965-10-15
•
Granted: 1966-09-27
•
Expires: 1985-10-15
Abstract
No abstract record available.
Inventors
- 👤 Norman J Allin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:59
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
IN A VARIABLE PITCH PROPELLER DRIVEN BY APPLIED POWER TO ACT ON AMBIENT FLUID, THE COMBINATION OF: A ROTARY HUB STRUCTURE ADAPTED TO BE DRIVEN BY THE APPLIED POWER; A PLURALITY OF BLADES ROTATABLY MOUNTED ON THE HUB STRUCTURE FOR ADJUSTMENT IN PITCH, EACH OF SAID BLADES HAVING A FINGER SPACED RADIALLY FROM ITS AXIS OF PITCH ADJUSTMENT, A PORTION OF THE ROTARY HUB STRUCTURE BEING ROTATABLE RELATIVE TO THE REST OF THE HUB STRUCTURE AND BEING RESPONSIVE TO THE FINGERS OF THE BLADES TO CHANGE TO TWO DIFFERENT STATES ALTERNATELY IN RESPONSE TO SUCCESSIVE OSCILLATIONS OF THE BLADES ABOUT THEIR PITCH AXES, SAID PORTION OF THE HUB STRUCTURE AT ITS TWO STATES CONFINING THE FINGERS OF THE BLADES AT TWO DIFFERENT PITCH ADJACENT OF THE BLADES, WHEREBY THE PITCH OF THE BLADES MAY BE CHANGED FROM ONE OF THE ALTERNATE PITCH ADJUSTMENTS TO THE OTHER BY INTERRUPTING THE APPLIED POWER AND THEN AGAIN APPLYING THE POWER TO CAUSE THE AMBIENT FLUID TO CREATE SUCCESSIVE OPPOSITE MOMENTS ON THE PROPELLERS TO OSCILLATE THE PROPELLERS THEREBY TO CHANGE THE STATE OF SAID PORTION OF THE HUB STRUCTURE.
Claim 2
Dependent Claim
186 words
IN A VARIABLE PITCH PROPELLER DRIVEN BY APPLIED POWER TO ACT ON AMBIENT FLUID, THE COMBINATION OF: A ROTARY HUB STRUCTURE ADAPTED TO BE DRIVEN BY THE APPLIED POWER; A PLURALITY OF BLADES ROTATABLY MOUNTED ON THE HUB STRUCTURE FOR ADJUSTMENT IN PITCH, EACH OF SAID BLADES HAVING A FINGER SPACED RADIALLY FROM ITS AXIS OF PITCH ADJUSTMENT, A PORTION OF THE ROTARY HUB STRUCTURE BEING ROTATABLE RELATIVE TO THE REST OF THE HUB STRUCTURE AND BEING RESPONSIVE TO THE FINGERS OF THE BLADES TO CHANGE TO TWO DIFFERENT STATES ALTERNATELY IN RESPONSE TO SUCCESSIVE OSCILLATIONS OF THE BLADES ABOUT THEIR PITCH AXES, SAID PORTION OF THE HUB STRUCTURE AT ITS TWO STATES CONFINING THE FINGERS OF THE BLADES AT TWO DIFFERENT PITCH ADJACENT OF THE BLADES, WHEREBY THE PITCH OF THE BLADES MAY BE CHANGED FROM ONE OF THE ALTERNATE PITCH ADJUSTMENTS TO THE OTHER BY INTERRUPTING THE APPLIED POWER AND THEN AGAIN APPLYING THE POWER TO CAUSE THE AMBIENT FLUID TO CREATE SUCCESSIVE OPPOSITE MOMENTS ON THE PROPELLERS TO OSCILLATE THE PROPELLERS THEREBY TO CHANGE THE STATE OF SAID PORTION OF THE HUB STRUCTURE.
References Cited (Backward Citations)
US3126967A
Cited
US1942126A
Cited
US2028463A
Cited
GB512057A
Cited
US2243046A
Cited
US2953208A
Cited
US3099321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |