Patent US3437173A successfully refreshed from Google Patents.
US3437173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine engine with screech attenuating means
Assignee: General Electric Co
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Filing: 1966-11-25
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Granted: 1969-04-08
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Expires: 1986-11-25
Abstract
No abstract record available.
Inventors
- 👤 Fredric Franklin Ehrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:32
CPC Classifications
C; C10; C10M; C10M3/00; F; F02; F02K; F02K1/00; F02K1/78; F02K1/82; F02K1/827
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A JET PROPULSION SYSTEM INCLUDING A DUCT CONTAINING A COMBUSTION ZONE, MEANS FOR ATTENUATING SCREECH MOUNTED ON THE INTERIOR OF SAID DUCT AND EXTENDING APPROXIMATELY THE LENGTH OF SAID ZONE, SAID MEANS COMPRISING: A LINER IN SAID DUCT, A PLURALITY OF PERFORATIONS LOCATED IN SAID LINER, AND A PLURALITY OF AXIALLY EXTENDING ELONGATED PARTITIONS LOCATED AT PREDETERMINED INTERVALS BETWEEN SAID LINER AND SAID DUCT AND FORMING WITH SAID DUCT AND SAID LINER ELONGATED SEGREATED COMPARTMENTS EXTENDING SUBSTANTIALLY THE LENGTH OF THE DUCT, SAID PERFORATIONS AND SAID PARTITIONS COOPERATING TO PREVENT THE BUILDUP OF HIGH INTENSITY PRESSURE OSCILLATIONS WHICH PRODUCE SCREECH NOISE IN SAID JET PROPULSION SYSTEM.
Claim 2
Dependent Claim
107 words
IN A JET PROPULSION SYSTEM INCLUDING A DUCT CONTAINING A COMBUSTION ZONE, MEANS FOR ATTENUATING SCREECH MOUNTED ON THE INTERIOR OF SAID DUCT AND EXTENDING APPROXIMATELY THE LENGTH OF SAID ZONE, SAID MEANS COMPRISING: A LINER IN SAID DUCT, A PLURALITY OF PERFORATIONS LOCATED IN SAID LINER, AND A PLURALITY OF AXIALLY EXTENDING ELONGATED PARTITIONS LOCATED AT PREDETERMINED INTERVALS BETWEEN SAID LINER AND SAID DUCT AND FORMING WITH SAID DUCT AND SAID LINER ELONGATED SEGREATED COMPARTMENTS EXTENDING SUBSTANTIALLY THE LENGTH OF THE DUCT, SAID PERFORATIONS AND SAID PARTITIONS COOPERATING TO PREVENT THE BUILDUP OF HIGH INTENSITY PRESSURE OSCILLATIONS WHICH PRODUCE SCREECH NOISE IN SAID JET PROPULSION SYSTEM.
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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |