US3109496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor and pitch control mechanism for a helicopter
Assignee: Kaman Aircraft Corp
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Filing: 1961-01-05
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Granted: 1963-11-05
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Expires: 1981-01-05
Abstract
No abstract record available.
Inventors
- 👤 Iii Charles W Ellis
- 👤 Jr Robert B Bossler
- 👤 Nicholas J Bosco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54; B64C27/58; B64C27/59; B64C27/615; B64C27/72; B64C2027/7205; B64C2027/7261; B64C2027/7294; Y; Y02; Y02T; Y02T50/00; Y02T50/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
FOR USE IN A HELICOPTER PROVIDED WITH A MULTIBLADED LIFTING ROTOR AND NORMALLY MOVABLE IN A FORWARD LONGITUDINAL DIRECTION, A PITCH CONTROL MECHANISM COMPRISING IN COMBINATION: FIRST AND SECOND PILOT OPERABLE MEMBERS, FIRST MEANS ASSOCIATED WITH SAID FIRST PILOT OPERABLE MEMBER FOR COLLECTIVELY INCREASING OR DECREASING THE PITCHES OF THE SEVERAL ROTOR BLADES IN RESPONSE TO MOVEMENT OF SAID FIRST PILOT OPERABLE MEMBER IN PREDETERMINED OPPOSITE DIRECTIONS, SECOND MEANS ASSOCIATED WITH SAID SECOND PILOT OPERABLE MEMBER FOR CHANGING THE PITCHES OF THE SEVERAL ROTOR BLADES IN A LONGITUDINAL CYCLIC MANNER IN RESPONSE TO MOVEMENT OF SAID SECOND PILOT OPERABLE MEMBER IN PREDETERMINED OPPOSITE DIRECTIONS, AND MEANS ASSOCIATED WITH SAID FIRST PILOT OPERABLE MEMBER AND EFFECTIVE THROUGHOUT AT LEAST A PORTION OF THE RANGE OF TRAVEL OF SAID FIRST MEMBER IN SAID PREDETERMINED OPPOSITE DIRECTIONS FOR CHANGING THE PITCHES OF THE SEVERAL ROTOR BLADES IN A LONGITUDINAL CYCLIC MANNER WHICH PITCH CHANGES ARE SUPERIMPOSED UPON ANY LONGITUDINAL CYCLIC PITCH PATTERN EFFECTED BY SAID SECOND PILOT OPERABLE MEMBER.
Claim 2
Dependent Claim
166 words
FOR USE IN A HELICOPTER PROVIDED WITH A MULTIBLADED LIFTING ROTOR AND NORMALLY MOVABLE IN A FORWARD LONGITUDINAL DIRECTION, A PITCH CONTROL MECHANISM COMPRISING IN COMBINATION: FIRST AND SECOND PILOT OPERABLE MEMBERS, FIRST MEANS ASSOCIATED WITH SAID FIRST PILOT OPERABLE MEMBER FOR COLLECTIVELY INCREASING OR DECREASING THE PITCHES OF THE SEVERAL ROTOR BLADES IN RESPONSE TO MOVEMENT OF SAID FIRST PILOT OPERABLE MEMBER IN PREDETERMINED OPPOSITE DIRECTIONS, SECOND MEANS ASSOCIATED WITH SAID SECOND PILOT OPERABLE MEMBER FOR CHANGING THE PITCHES OF THE SEVERAL ROTOR BLADES IN A LONGITUDINAL CYCLIC MANNER IN RESPONSE TO MOVEMENT OF SAID SECOND PILOT OPERABLE MEMBER IN PREDETERMINED OPPOSITE DIRECTIONS, AND MEANS ASSOCIATED WITH SAID FIRST PILOT OPERABLE MEMBER AND EFFECTIVE THROUGHOUT AT LEAST A PORTION OF THE RANGE OF TRAVEL OF SAID FIRST MEMBER IN SAID PREDETERMINED OPPOSITE DIRECTIONS FOR CHANGING THE PITCHES OF THE SEVERAL ROTOR BLADES IN A LONGITUDINAL CYCLIC MANNER WHICH PITCH CHANGES ARE SUPERIMPOSED UPON ANY LONGITUDINAL CYCLIC PITCH PATTERN EFFECTED BY SAID SECOND PILOT OPERABLE MEMBER.
References Cited (Backward Citations)
US2599690A
Cited
US2877856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |