US3245494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed governors and controls
Assignee: Curtiss Wright Corp
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Filing: 1963-02-27
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Granted: 1966-04-12
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Expires: 1983-02-27
Abstract
No abstract record available.
Inventors
- 👤 Donald J Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:51
CPC Classifications
B; B60; B60K; B60K31/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
IN AN ENGINE GOVERNING SYSTEM, A GOVERNOR WHEREIN A PILOT VALVE MEMBER OF A FLUID PRESSURE OPERATED AMPLIFIER INCLUDING A FLUID MOTOR CONNECTED TO CONTROL THE SPEED OF THE ENGINE IS OPERATED AUTOMATICALLY TO CONTROL THE ENGINE SPEED AT SELECTABLE POINTS, AN ELECTRICAL CONTROL CIRCUIT, AN ELECTRICALLY OPERATED DEVICE IN THE CIRCUIT CONNECTED TO ACTIVATE THE GOVERNOR FOR AUTOMATIC CONTROL OF THE ENGINE SPEED, A NORMALLY INACTIVE CONTROL MEANS IN THE CIRCUIT AND MEANS ACTING IN RESPONSE TO ATTAINMENT OF A SELECTED POINT IN ENGINE SPEED AND CONNECTED TO ACTIVATE THE SAID CONTROL MEANS, AND ENERGIZE SAID DEVICE, A NORMALLY OPEN LOCK-OUT SWITCH IN THE CONTROL CIRCUIT IN SERIES WITH THE ELECTRICALLY OPERATED DEVIVE, AND REQUIRING CLOSURE FOR ACTIVATION OF THE GOVERNOR, AND MEANS RESPONSIVE TO ATTAINMENT OF A HIGHER THAN ZERO ENGINE SPEED BUT BELOW THE SELECTED POINT AND OPERATING, UPON SUCH ATTAINMENT, TO CLOSE THE LOCK-OUT SWITCH.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |