US3134088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Landing gear warning system
Assignee: Individual
•
Filing: 1961-07-07
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Granted: 1964-05-19
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Expires: 1981-07-07
Abstract
No abstract record available.
Inventors
- 👤 Wayne D Sarver
- 👤 Thomas J Stolle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:36
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/02; B64C25/08; B64C25/10; B64C25/18; B64C25/26; B64C25/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A LANDING GEAR WARNING SYSTEM FOR AIRCRAFT COMPRISING A FLAG ON THE SPEED INDICATOR DIAL FACE OF AN AIRCRAFT, MEANS OPERATIVELY CONNECTING SAID FLAG TO AN ELECTRIC MOTOR, AND AN ACTUATING CIRCUIT FOR SAID MOTOR INCLUDING A DIAPHRAGM-ACTUATED SWITCH ADAPTED TO BE CLOSED WHEN THE AIRSPEED OF THE AIRCRAFT FALLS BELOW A PREDETERMINED VALUE AND A THROTTLE-ACTUATED SWITCH ADAPTED TO BE CLOSED BY MOVEMENT OF THE THROTTLE BEYOND A PREDETERMINED LIMIT, SAID MOTOR BEING OPERATIVE ONLY WHEN BOTH SAID SWITCHES ARE CLOSED.
Claim 2
Dependent Claim
82 words
A LANDING GEAR WARNING SYSTEM FOR AIRCRAFT COMPRISING A FLAG ON THE SPEED INDICATOR DIAL FACE OF AN AIRCRAFT, MEANS OPERATIVELY CONNECTING SAID FLAG TO AN ELECTRIC MOTOR, AND AN ACTUATING CIRCUIT FOR SAID MOTOR INCLUDING A DIAPHRAGM-ACTUATED SWITCH ADAPTED TO BE CLOSED WHEN THE AIRSPEED OF THE AIRCRAFT FALLS BELOW A PREDETERMINED VALUE AND A THROTTLE-ACTUATED SWITCH ADAPTED TO BE CLOSED BY MOVEMENT OF THE THROTTLE BEYOND A PREDETERMINED LIMIT, SAID MOTOR BEING OPERATIVE ONLY WHEN BOTH SAID SWITCHES ARE CLOSED.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |