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| Number | Title | Issue Date |
| 4898783 | Sound and thermal insulation A thermal insulating and/or sound absorbing structure comprising a batting of resilient, elongatable, non-flammable non-linear carbonaceous fibers, said fibers having a reversible deflection ratio of greater than 1.2:1, an aspect ratio greater than 10:1 a... | 02/06/1990 |
| 4836469 | System for reducing aircraft noise and hush kit A system is provided for existing three-engine jet aircraft to reduce the noise levels at take-off and landing in order to meet governmental noise regulations. The system is particularly suitable for 727-200 aircraft having three JT8D engines. A hush kit ... | 06/06/1989 |
| 4826106 | Advanced composite aircraft cowl An aircraft cowl, and in particular a translating cowl, used as a component of a thrust reverser, formed of at least one one-piece bondment cured in a single operation. Preferably, a one-piece inner bondment and a one-piece outer bondment fastened togethe... | 05/02/1989 |
| 4795308 | Obstacle in front of a propeller In combination with a propeller disposed in an aircraft, aft from the nose portion of the craft, an improvement is provided for reducing noise, as well as mechanical load on the propeller blade, and includes a construction part situated upstream from the ... | 01/03/1989 |
| 4759513 | Noise reduction nacelle A noise reduction nacelle for a jet engine having an inlet duct, a center body and at least one exit duct and which includes a composite sandwich panel positioned in the inlet duct, the center body and the at least one exit duct. The panel includes an inn... | 07/26/1988 |
| 4755416 | Process for constructing a structural element that absorbs airborne sound The process makes it possible to determine for sound-absorbing structural elements made of a compact or foamed plastic with cup-shaped protuberances, the thickness and area size of the resonance surfaces that is required for an optimal sound aborption, as... | 07/05/1988 |
| 4749150 | Turbofan duct with noise suppression and boundary layer control A boundary layer control device is installed in the acoustically treated inlet duct of a turbofan engine. The device sucks off the turbulent boundary layer of air flowing over the inner or "air wetted" surface of the inlet during aircraft take-off, cruise... | 06/07/1988 |
| 4715559 | Apparatus and method for global noise reduction Apparatus is disclosed for attenuating sound radiated from a vibrating surface into a control volume as comprised of a source of a control signal indicative of the amplitude and frequency content of the sound transmitted from the vibrating surface. An act... | 12/29/1987 |
| 4650139 | Aerospike for attachment to space vehicle system An aerospike is adapted to be attached to the front nose of an aerodynamically asymmetric space vehicle system, such as the external tank and orbiter of the space shuttle. The aerospike basically comprises a tapered elongated portion having a first end wh... | 03/17/1987 |
| 4534526 | Cabin noise suppression in propeller driven aircraft The fuselage (cabin) (15) of a propeller (45) driven aircraft (10) is isolated from vibration associated with the wake (46) of the propeller by vibration isolators (50, 55 and 110) in the wing and tail surfaces of the aircraft.... | 08/13/1985 |
| 4483497 | Wide-body supersonic aircraft This invention is an improvement of my system for supersonic aircraft which provides the required angular momentum reaction to the continuous generation of new lift circulation by vorticity in lieu of dissipative shock waves. This new system relocates the... | 11/20/1984 |
| 4447022 | Reduced noise monolithic wing-stabilizer aircraft A sound reducing combined low mid-wing and horizontal stabilizer airplane with near longitudinal center line thrust twin engines having intensified aileron, elevator and rudder control. Small jet engines rigidly attached to the ailerons intensify attitude... | 05/08/1984 |
| 4243188 | Precompression fin for axisymmetric inlet on winged high speed vehicles Precompression fins extending perpendicular from the wings of a high speed missile are judiciously located relative to an axisymmetric inlet of an airbreathing power plant such that the outwash angle induced by the body and wing of the missile enhances th... | 01/06/1981 |
| 4169517 | Device serving the noise control of sound energy radiated from the jet engines of an aircraft operated on the ground in stationary position A device for shielding the sound energy radiated from the jet engines of an aircraft formed from two panels being in horizontal and vertical longitudinal view arranged concavely in a clamshell type.... | 10/02/1979 |
| 4168044 | Energy conserving supersonic aircraft This invention is an extension of my system to recover into useful work the energy normally wasted by a supersonic aircraft in its shock wave mechanism. This system utilizes the excess propulsive jet velocity in a sheet below the wing to form a planar vor... | 09/18/1979 |
| 4114836 | Airplane configuration designed for the simultaneous reduction of drag and sonic boom A plurality of passageways, each having its longitudinal axis substantially parallel to the flight path of an aircraft, extend through the wings, fuselage, horizontal elevators, and rudder for the purpose of permitting air to pass through these areas. The... | 09/19/1978 |
| 4036452 | Retractable engine noise suppression system for over-the-wing jet aircraft Retractable multiple aperture arrays, mounted behind jet engines that produce jet exhausts that pass chordwise over the wings of an aircraft, are disclosed. In their operative positions, a multiple aperture array lies in the exhaust path of each engine, i... | 07/19/1977 |
| 4008866 | Compression energy transformation system for a supersonic wing A supersonic wing in turning the airstream downward to generate increased pressure on its underside also increases the air density. The energy of this compression field is normally diverted away from the wing downward towards the ground in the supersonic ... | 02/22/1977 |
| 3991849 | Sound absorption with variable acoustic resistance means A system for varying the acoustic resistance of an acoustical lining disposed in a duct of an air propulsor comprises a nonlinear sound suppression liner having a porous facing sheet overlying a plurality of cells, header means communicating with each of ... | 11/16/1976 |
| 3968853 | Notch attenuation device A method for the attenuation of the noise emitted by a main exhaust nozzle f a jet engine, wherein an auxiliary exhaust nozzle adapted to emit less noise than the main nozzle is associated with said main nozzle and is located to the side of the main nozzle... | 07/13/1976 |
| 3968944 | Aircraft with shrouded propeller drive This invention relates to an improvement in an aircraft having a tail-mounted, shrouded pusher-type propeller and an engine mounted in front of the shroud, the improvement comprising exhaust pipe running from the engine to the shroud.... | 07/13/1976 |
