US3102597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of second harmonic control
Assignee: Bell Aerospace Corp
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Filing: 1961-08-14
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Granted: 1963-09-03
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Expires: 1981-08-14
Abstract
No abstract record available.
Inventors
- 👤 Jan M Drees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:15
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54; B64C27/58; B64C27/59; B64C27/605; B64C27/72; Y; Y02; Y02T; Y02T50/00; Y02T50/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN THE DRIVING OF A HELICOPTER OF THE TYPE HAVING A ROTATABLE MAST WITH ROTOR BLADES ADJUSTABLY FIXED THERETO AND INCLUDING A FIRST HARMONIC CYCLIC PITCH CONTROL, A METHOD FOR TRANSFORMING ROTATIONAL MOVEMENT OF SAID MAST INTO A ROTOR BLADE SECOND HARMONIC PITCH CONTROL, COMPRISING: (A) INTERPOSING BETWEEN SAID MAST AND SAID FIRST HARMONIC CYCLIC PITCH CONTROL A FIRST LINK ARTICULATED UPON A FIRST AXIS IN A TILTABLE PLANE AND A SECOND LINK CONNECTED TO SAID FIRST LINK UPON A SECOND AXIS PERPENDICULAR TO SAID FIRST AXIS, SAID SECOND LINK BEING CONNECTED TO SAID FIRST HARMONIC CYCLIC PITCH CONTROL; (B) ROTATIONALLY DRIVING SAID SECOND LINK FROM SAID MAST; AND (C) TILTING THE AXIS OF SAID FIRST LINK TO PROVIDE RECIPROCATING MOVEMENT AMPLITUDE CONTROL.
Claim 2
Dependent Claim
123 words
IN THE DRIVING OF A HELICOPTER OF THE TYPE HAVING A ROTATABLE MAST WITH ROTOR BLADES ADJUSTABLY FIXED THERETO AND INCLUDING A FIRST HARMONIC CYCLIC PITCH CONTROL, A METHOD FOR TRANSFORMING ROTATIONAL MOVEMENT OF SAID MAST INTO A ROTOR BLADE SECOND HARMONIC PITCH CONTROL, COMPRISING: (A) INTERPOSING BETWEEN SAID MAST AND SAID FIRST HARMONIC CYCLIC PITCH CONTROL A FIRST LINK ARTICULATED UPON A FIRST AXIS IN A TILTABLE PLANE AND A SECOND LINK CONNECTED TO SAID FIRST LINK UPON A SECOND AXIS PERPENDICULAR TO SAID FIRST AXIS, SAID SECOND LINK BEING CONNECTED TO SAID FIRST HARMONIC CYCLIC PITCH CONTROL; (B) ROTATIONALLY DRIVING SAID SECOND LINK FROM SAID MAST; AND (C) TILTING THE AXIS OF SAID FIRST LINK TO PROVIDE RECIPROCATING MOVEMENT AMPLITUDE CONTROL.
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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |