US3093219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural-section airfoils
Assignee: MONTE COPTER Inc
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Filing: 1961-04-06
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Granted: 1963-06-11
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Expires: 1981-04-06
Abstract
No abstract record available.
Inventors
- 👤 Maurice L Ramme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:52
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473; B64C3/00; B64C3/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A SECTIONAL AIRFOIL COMPRISING TWO AIRFOIL SECTIONS HAVING JOINT ELEMENTS EXTENDING SPANWISE OF THE AIRFOIL, INTERENGAGEABLE TO CONNECT SAID SECTIONS BY RELATIVE SWINGING OF SAID SECTIONS TO INCREASE THE DOWNWARDLY FACING OBTUSE ANGLE FORMED BETWEEN THE ADJACENT LOWER SURFACES OF SAID SECTIONS, AND INCLUDING TWO RESILIENTLY SELF-INTERLOCKING ELEMENTS ONE CARRIED BY ONE OF SAID AIRFOIL SECTIONS AND THE OTHER CARRIED BY THE OTHER OF SAID AIRFOIL SECTIONS.
Claim 2
Dependent Claim
67 words
A SECTIONAL AIRFOIL COMPRISING TWO AIRFOIL SECTIONS HAVING JOINT ELEMENTS EXTENDING SPANWISE OF THE AIRFOIL, INTERENGAGEABLE TO CONNECT SAID SECTIONS BY RELATIVE SWINGING OF SAID SECTIONS TO INCREASE THE DOWNWARDLY FACING OBTUSE ANGLE FORMED BETWEEN THE ADJACENT LOWER SURFACES OF SAID SECTIONS, AND INCLUDING TWO RESILIENTLY SELF-INTERLOCKING ELEMENTS ONE CARRIED BY ONE OF SAID AIRFOIL SECTIONS AND THE OTHER CARRIED BY THE OTHER OF SAID AIRFOIL SECTIONS.
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |