US3089306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Limitation of thermal shock in engine components
Assignee: Power Jets Research and Development Ltd
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Filing: 1959-12-10
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Granted: 1963-05-14
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Expires: 1979-12-10
Abstract
No abstract record available.
Inventors
- 👤 Fitchie John William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/28; F01; F01D; F01D19/00; F01D19/02; F02K; F02K3/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
AN ENGINE CONTROL SYSTEM COMPRISNG A CONTROL MEMBER OPERABLE TO VARY THE RATE OF FUEL SUPPLY TO THE ENGINE, A DECELERATION CONTROL ASSOCIATED WITH THE CONTROL MEMBER INCLUDING LIMITING MEANS RESPONSIVE TO A RATE OF MOVEMENT OF THE CONTROL MEMBER SUFFICIENT TO SCHEDULE A REDUCED RATE OF FUEL FLOW WHICH WOULD NORMALLY PRODUCE DAMAGING THERMAL SHOCK STRESSES IN ENGINE COMPONENTS TO IMPOSE A LIMIT UPON THE RATE OF REDUCTION OF FUEL SUPPLY SUCH AS WILL MAINTAIN THERMAL SHOCK STRESSES IN THE ENGINE COMPONENTS WITHIN ACCEPTABLE LIMITS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |