US3280565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
External expansion ramjet engine
Assignee: Individual
•
Filing: 1963-01-10
•
Granted: 1966-10-25
•
Expires: 1983-01-10
Abstract
No abstract record available.
Inventors
- 👤 Gordon L Dugger
- 👤 James L Keirsey
- 👤 Robert W Mccloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:08
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/10; F02K7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A RAMJET ENGINE FOR FLIGHT AT SPEEDS IN EXCESS OF SONIC VELOCITY, INCLUDING A MAIN BODY OF RECTANGULAR CROSS-SECTION, A COWL POSITIONED CENTRALLY OF SAID BODY AND SPACED THEREFROM, SAID COWL HAVING A LEADING EDGE AND A TRAILEDGE, MEANS SECURING THE COWL TO THE MAIN BODY AND COOPERATING WITH SAID BODY AND SAID COWL TO DEFINE A FLOW DUCT, AN EXTERNAL ISENTROPIC COMPRESSION SURFACE ON SAID BODY AND EXTENDING FORWARDLY OF SAID LEADING EDGE, SAID LEADING EDGE BEING SO POSITIONED RELATIVE TO SAID COMPRESSION SURFACE THAT A SHOCK WAVE FORMED BY THE LATTER WHEN THE ENGINE IS FLOWN AT A SPECIFIED SUPERSONIC SPEED WILL IMPINGE UPON SAID LEADING EDGE, AN EXTERNAL EXPANSION SURFACE ON SAID BODY EXTENDING REARWARDLY OF SAID TRAILING EDGE,
Claim 2
Dependent Claim
122 words
A RAMJET ENGINE FOR FLIGHT AT SPEEDS IN EXCESS OF SONIC VELOCITY, INCLUDING A MAIN BODY OF RECTANGULAR CROSS-SECTION, A COWL POSITIONED CENTRALLY OF SAID BODY AND SPACED THEREFROM, SAID COWL HAVING A LEADING EDGE AND A TRAILEDGE, MEANS SECURING THE COWL TO THE MAIN BODY AND COOPERATING WITH SAID BODY AND SAID COWL TO DEFINE A FLOW DUCT, AN EXTERNAL ISENTROPIC COMPRESSION SURFACE ON SAID BODY AND EXTENDING FORWARDLY OF SAID LEADING EDGE, SAID LEADING EDGE BEING SO POSITIONED RELATIVE TO SAID COMPRESSION SURFACE THAT A SHOCK WAVE FORMED BY THE LATTER WHEN THE ENGINE IS FLOWN AT A SPECIFIED SUPERSONIC SPEED WILL IMPINGE UPON SAID LEADING EDGE, AN EXTERNAL EXPANSION SURFACE ON SAID BODY EXTENDING REARWARDLY OF SAID TRAILING EDGE,
References Cited (Backward Citations)
FR945470A
Cited
US2631425A
Cited
US3008669A
Cited
US3104522A
Cited
US3080711A
Cited
US3069119A
Cited
US3143401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |