US3285502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced fan construction
Assignee: Brookside Corp
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Filing: 1965-01-25
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Granted: 1966-11-15
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Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 John A Wooden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:35
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/66; F04D29/661; F04D29/666; F04D29/26; F04D29/32; F04D29/325; F04D29/328; F04D29/662; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A FAN SPIDER HAVING A PLURALITY OF RADIALLY EXTENDING LEGS, SAID LEGS EACH BEING ADAPTED TO HAVE IDENTICAL FAN BLADES SECURED THERETO, THE ANGLE BETWEEN THE LONGITUDINAL AXES OF ANY TWO OF SAID LEGS DIFFERING IN MAGNITUDE FROM THE ANGLE BETWEEN THE LONGITUDINAL AXES OF ANY OTHER TWO OF SAID LEGS, THE CENTER OF GRAVITY OF EACH OF SAID LEGS BEING EQUIDISTANT FROM THE CENTER OF SAID SPIDER, THE ANGULAR SPACING OF SAID LEGS BEING SUCH AS TO DYNAMICALLY BALANCE SAID SPIDER ABOUT ITS CENTER WITHOUT THE ADDITION OR SUBTRACTION OF MASS TO OR FROM SAID LEGS.
Claim 2
Dependent Claim
97 words
A FAN SPIDER HAVING A PLURALITY OF RADIALLY EXTENDING LEGS, SAID LEGS EACH BEING ADAPTED TO HAVE IDENTICAL FAN BLADES SECURED THERETO, THE ANGLE BETWEEN THE LONGITUDINAL AXES OF ANY TWO OF SAID LEGS DIFFERING IN MAGNITUDE FROM THE ANGLE BETWEEN THE LONGITUDINAL AXES OF ANY OTHER TWO OF SAID LEGS, THE CENTER OF GRAVITY OF EACH OF SAID LEGS BEING EQUIDISTANT FROM THE CENTER OF SAID SPIDER, THE ANGULAR SPACING OF SAID LEGS BEING SUCH AS TO DYNAMICALLY BALANCE SAID SPIDER ABOUT ITS CENTER WITHOUT THE ADDITION OR SUBTRACTION OF MASS TO OR FROM SAID LEGS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |