Patent US3655147A successfully refreshed from Google Patents.
US3655147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for reducing the supersonic boom caused by aircraft
Assignee: Individual
•
Filing: 1968-04-25
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Granted: 1972-04-11
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Expires: 1988-04-25
Abstract
Abstract The invention describes means for reducing the supersonic boom caused by aircraft. Underneath the aircraft reflecting surfaces are provided in the area of the maximum pressure difference of the Mach cone created by the aircraft.
Inventors
- 👤 Heinz Preuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:11
CPC Classifications
B; B64; B64C; B64C23/00; B64C23/04; B64C2230/00; B64C2230/12; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
64 words
Device for reducing the sonic boom produced by aircraft, especially in direction toward earth''s surface, comprising a reflecting surface located at a distance underneath the fuselage of the aircraft in the area of the maximum pressure difference of the Mach cone caused especially by the fuselage, said reflecting surface being convex in the longitudinal direction to the fuselage to reduce reflection against the fuselage.
Claim 2
Dependent Claim
64 words
Device for reducing the sonic boom produced by aircraft, especially in direction toward earth''s surface, comprising a reflecting surface located at a distance underneath the fuselage of the aircraft in the area of the maximum pressure difference of the Mach cone caused especially by the fuselage, said reflecting surface being convex in the longitudinal direction to the fuselage to reduce reflection against the fuselage.
Claim 3
Independent Claim
67 words
A device for reducing the sonic boom produced by aircraft, especially in the direction to the earth''s surface, comprising a hollow reflecting surface which is arranged at a distance underneath the fuselage of the aircraft in the area of the maximum pressure difference of the Mach cone caused especially by the fuselage of the aircraft, super pressure being present in said hollow reflecting surface for better reflection.
Claim 4
Independent Claim
67 words
A device for reducing the sonic boom produced by aircraft, especially in the direction to the earth''s surface, comprising a hollow reflecting surface which is arranged at a distance underneath the fuselage of the aircraft in the area of the maximum pressure difference of the Mach cone caused especially by the fuselage of the aircraft, super pressure being present in said hollow reflecting surface for better reflection.
Claim 5
Independent Claim
72 words
A device for reducing the sonic boom produced by aircraft, especially in the direction to the earth''s surface, comprising a reflecting surface which is arranged at a distance underneath the fuselage of the aircraft in the area of the maximum pressure difference of the Mach cone caused especially by the fuselage of the aircraft, and means heating said reflecting surface to obtain a warmer layer of air directly at the reflecting surface.
Claim 6
Independent Claim
72 words
A device for reducing the sonic boom produced by aircraft, especially in the direction to the earth''s surface, comprising a reflecting surface which is arranged at a distance underneath the fuselage of the aircraft in the area of the maximum pressure difference of the Mach cone caused especially by the fuselage of the aircraft, and means heating said reflecting surface to obtain a warmer layer of air directly at the reflecting surface.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |