US3357239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine engine life indicator
Assignee: Avco Corp
•
Filing: 1965-08-10
•
Granted: 1967-12-12
•
Expires: 1985-08-10
Abstract
No abstract record available.
Inventors
- 👤 Hohenberg Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
G; G01; G01K; G01K3/00; G01K3/02; G01K3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A SYSTEM FOR DETERMINING THE EXHAUSTED LIFE OF AN INTERNAL COMBUSTION ENGINE AS A FUNCTION OF AN OPERATING PARAMETER AND TIME, SAID ENGINE HAVING A LIFE EXPECTANCE CHARACTERISTIC WHICH IS A FUNCTION OF SAID OPERATING PARAMETER, THE COMBINATION COMPRISING: MEANS FOR CONTINUOUSLY GENERATING SIGNALS PROPORTIONAL TO THE INSTANTANEOUS LEVEL OF SAID ENGINE OPERATING PARAMETER; AN INTEGRATOR FOR SUMMING THE SIGNALS APPLIED THERETO; IMPEDANCE MEANS COUPLING SAID SIGNALS TO SAID INTEGRATOR, SAID IMPEDANCE HAVING IMPEDANCE VERSUS SIGNAL MAGNITUDE CHARACTERISTICS WHICH APPROXIMATE THE RECIPROCAL OF SAID LIFE EXPECTANCY CHARACTERISTIC, WHEREBY THE SUMMATION OF SAID SIGNALS IN SAID INTERGATOR IS APPROXIMATELY PROPORTIONAL TO THE EXHAUSTED LIFE OF SAID ENGINE; MEANS DERIVING FROM SAID SIGNALS ADDITIONAL SIGNALS PROPORTIONAL TO THE RATE OF CHANGE OF SAID PARAMETER; AND MEANS WHEN SAID ADDITIONAL SIGNALS EXCEED A PREDETERMINED MAGNITUDE FOR COUPLING SAID ADDITIONAL SIGNALS TO SAID INTEGRATOR, WHEREBY SAID ADDITIONAL SIGNALS ARE ALSO SUMMED BY SAID INTEGRATOR.
Claim 2
Independent Claim
150 words
A SYSTEM FOR DETERMINING THE EXHAUSTED LIFE OF AN INTERNAL COMBUSTION ENGINE AS A FUNCTION OF AN OPERATING PARAMETER AND TIME, SAID ENGINE HAVING A LIFE EXPECTANCE CHARACTERISTIC WHICH IS A FUNCTION OF SAID OPERATING PARAMETER, THE COMBINATION COMPRISING: MEANS FOR CONTINUOUSLY GENERATING SIGNALS PROPORTIONAL TO THE INSTANTANEOUS LEVEL OF SAID ENGINE OPERATING PARAMETER; AN INTEGRATOR FOR SUMMING THE SIGNALS APPLIED THERETO; IMPEDANCE MEANS COUPLING SAID SIGNALS TO SAID INTEGRATOR, SAID IMPEDANCE HAVING IMPEDANCE VERSUS SIGNAL MAGNITUDE CHARACTERISTICS WHICH APPROXIMATE THE RECIPROCAL OF SAID LIFE EXPECTANCY CHARACTERISTIC, WHEREBY THE SUMMATION OF SAID SIGNALS IN SAID INTERGATOR IS APPROXIMATELY PROPORTIONAL TO THE EXHAUSTED LIFE OF SAID ENGINE; MEANS DERIVING FROM SAID SIGNALS ADDITIONAL SIGNALS PROPORTIONAL TO THE RATE OF CHANGE OF SAID PARAMETER; AND MEANS WHEN SAID ADDITIONAL SIGNALS EXCEED A PREDETERMINED MAGNITUDE FOR COUPLING SAID ADDITIONAL SIGNALS TO SAID INTEGRATOR, WHEREBY SAID ADDITIONAL SIGNALS ARE ALSO SUMMED BY SAID INTEGRATOR.
References Cited (Backward Citations)
US3237448A
Cited
US3250901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |