Patent US3462674A successfully refreshed from Google Patents.
Patent US3323711A successfully refreshed from Google Patents.
US3323711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan blade construction
Assignee: CTB Inc
•
Filing: 1965-08-05
•
Granted: 1967-06-06
•
Expires: 1985-08-05
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:31
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A FAN BLADE CONSTRUCTION COMPRISING A CENTRAL HUB MEMBER, A PLURALITY OF GENERALLY RADIALLY EXTENDING BLADE ELEMENTS, EACH OF SAID BLADE ELEMENTS HAVING AN AIRFOIL CROSS-SECTIONAL CONFIGURATION SUBSTANTIALLY THROUGHOUT ITS LENGTH, SAID AIRFOIL CONFIGURATION HAVING RELATIVELY THIN LEADING AND TRAILING MARGINAL PORTIONS AND A RELATIVELY THICK CENTRAL PORTION, EACH OF SAID BLADE ELEMENTS HAVING A PREDETERMINED PITCH AT AN INNER END THEREOF AND BEING FORMED WITH A VARYING PITCH TOWARD AN OUTER END THEREOF, MEANS ATTACHING SAID BLADE ELEMENTS TO SAID HUB MEMBER COMPRISING AN ATTACHMENT BRACKET FOR EACH OF SAID BLADE ELEMENTS, EACH OF SAID ATTACHMENT BRACKETS INCLUDING A BODY PORTION PRESENTING A SEAT SURFACE CONFORMING TO AN ADJACENT SURFACE OF ITS ASSOCIATED BLADE ELEMENT, LEADING ENDS OF SAID BRACKET BODY PORTIONS SUBSTANTIALLY ABUTTING SAID HUB MEMBER, EACH OF SAID BRACKETS INCLUDING A FOOT MEANS CONNECTED WITH A TRAILING PORTION OF ITS BODY PORTION AND ENGAGING SAID HUB MEMBER AND POSITIONING SAID BODY PORTION AT SAID PREDETERMINED PITCH WITH RESPECT TO SAID HUB MEMBER.
Claim 2
Dependent Claim
165 words
A FAN BLADE CONSTRUCTION COMPRISING A CENTRAL HUB MEMBER, A PLURALITY OF GENERALLY RADIALLY EXTENDING BLADE ELEMENTS, EACH OF SAID BLADE ELEMENTS HAVING AN AIRFOIL CROSS-SECTIONAL CONFIGURATION SUBSTANTIALLY THROUGHOUT ITS LENGTH, SAID AIRFOIL CONFIGURATION HAVING RELATIVELY THIN LEADING AND TRAILING MARGINAL PORTIONS AND A RELATIVELY THICK CENTRAL PORTION, EACH OF SAID BLADE ELEMENTS HAVING A PREDETERMINED PITCH AT AN INNER END THEREOF AND BEING FORMED WITH A VARYING PITCH TOWARD AN OUTER END THEREOF, MEANS ATTACHING SAID BLADE ELEMENTS TO SAID HUB MEMBER COMPRISING AN ATTACHMENT BRACKET FOR EACH OF SAID BLADE ELEMENTS, EACH OF SAID ATTACHMENT BRACKETS INCLUDING A BODY PORTION PRESENTING A SEAT SURFACE CONFORMING TO AN ADJACENT SURFACE OF ITS ASSOCIATED BLADE ELEMENT, LEADING ENDS OF SAID BRACKET BODY PORTIONS SUBSTANTIALLY ABUTTING SAID HUB MEMBER, EACH OF SAID BRACKETS INCLUDING A FOOT MEANS CONNECTED WITH A TRAILING PORTION OF ITS BODY PORTION AND ENGAGING SAID HUB MEMBER AND POSITIONING SAID BODY PORTION AT SAID PREDETERMINED PITCH WITH RESPECT TO SAID HUB MEMBER.
References Cited (Backward Citations)
US1319634A
Cited
US1454356A
Cited
US1869802A
Cited
US2032224A
Cited
GB614074A
Cited
US2794509A
Cited
US2856675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |