Matches 201 - 250 out of 436 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
4916445 Obstruction proximity indication system for an aircraft  
Visually observable safe limits for the proximity of an aircraft, such as a helicopter, to obstructions are provided by pairs of lights which provide collimated beams intersecting at limit points...
4913377 Devices which may be borne in air and on devices applicable therein  
An air-borne craft is provided with at least two pairs of propellers with substantially vertical axes. One pair of the propellers is provided on the front portion of the craft, the other pair on...
4913376 VTLH autogyro  
This invention relates to autogyros and to counter-rotating rotor helicopters. It further relates to compound autogyros and/or helicopters that employ a lifting surface or wing in forward flight....
4899957 Air borne craft, for example helicopter, and related devices  
In a vehicle or device a fluid motor is employed to drive rotary members, such as wheels, propellers, tracks. The motor is provided with an arrangement which includes a control means and an axially...
4875643 Starter arrangement for a helicopter  
A helicopter equipped with a reciprocating piston internal combustion engine in which an override clutch is arranged in a drive connection between the internal combustion engine and a rotor drive,...
4830312 Airplane, preferably a helicopter  
A helicopter is driven by means of a rotor that is connected with an internal-combustion engine. The air-cooled internal-combustion engine has a horizontally opposed construction and is arranged...
4826109 Helicopter supported material transfer assembly  
A material handling assembly primarily in the form of a clamshell structure being hyraulically activated and used in combination with a helicopter for the support of the clamshell structure and its...
4826103 Active cable-cutting assembly for aircraft  
An active, automatic-firing, impact responsive cable-cutting apparatus for use on conventional aircraft such as helicopters for virtually instantaneously forcibly severing obstructive cables. A...
4819182 Method and apparatus for reducing vibration of a helicopter fuselage  
This invention relates to a method and apparatus for reducing vibration of a helicopter fuselage. The apparatus comprises a plurality of actuators interconnecting parts of the helicopter structure...
4818992 Excessive altitude loss after take-off warning system for rotary wing aircraft  
A warning system for rotary wing aircraft compares the accumulated altitude loss after take-off of the aircraft with its altitude above ground, and generates a warning if the altitude loss is...
4809930 Helicopter  
A helicopter having a body and a tail boom connected, at the rear end, to an integral tail unit, and on which each of the vertical sections formed through the body and the tail boom presents a...
4809931 Directional and stabilizing device having a faired and slanted antitorque rotor and a disymmetric "V" empennage, and a helicopter equipped with such a device  
A directional and stabilizing device is provided including a faired antitorque rotor, driven in rotation in a transverse aperture formed in a fairing slanted with respect to the vertical by an...
4771967 Rotor aircraft  
A rotorcraft is provided with laterally placed dual rotors which rotate in opposite directions with the axis through the center of the rotors being transverse to the longitudinal axis of the...
4770373 Quick release ladder device for helicopters  
A rescue ladder for air to ground deployment is provided with a quick release mechanism which enables the ladder to be detached from an aircraft in case of emergency. The quick release mechanism...
4769645 Excessive pitch attitude warning system for rotary wing aircraft  
A system for warning the pilot of a rotary wing aircraft such as a helicopter of a flight condition that, if left uncorrected, would result in the tail of the aircraft striking the ground monitors...
4765567 Helicopter target  
A remote-controlled autogyro visually and functionally simulates a helicopter with stub wings (e.g. the Hind D), so that an expendable helicopter-simulating target is produced. The target has a...
4738098 Safety timer for turbine powered helicopter  
A timing device to automatically timing the turbine engine cool-down period for a turbine engine helicopter. The electronic timer is activated when the micro-switch on the engine throttle cable is...
4736906 Method and apparatus for cancelling the electrostatic potential of a helicopter relative to ground potential  
A rescuer (1) is lowered at the end of cable (2) from a helicopter having a winch (4) on which the cable is wound. The rescuer is provided with a electric field sensor (20) which is downwardly...
4726547 Helicopter with high forward speed  
A helicopter having the usual tiltable, vertical thrust and lift producing rotor, a separate forward thrust producing propeller as well as provisions for yaw control and compensation is improved in...
4720059 High speed helicopter  
A high speed helicopter, ideally suited for use with rotors which are tip propelled, has an offset flapping hub mounted on a tiltable mast which is located a substantial distance off to the...
4717907 Remote parameter monitoring system with location-specific indicators  
A remote parameter monitoring system utilizes a series of half-wave rectifier diodes in combination with a unique overlapping wiring arrangement to provide for location-specific detection of a...
4715263 Roll turret for a gun mount  
A retractable gun for mounting within the fuselage of an aircraft, typically a helicopter, is disposed in a firing position and aimed by rotation of a turret which is coupled to and parallel to the...
4702437 Electric air-driven helicopter  
A helicopter has a low profile electric motor mounted in each of the rotor blades to drive a cross-flow fan which draws air in through a slot at the leading edge of the blade and forces it out...
4653705 Autogyro with auxiliary rotor drive  
An improved autogyro including a main airframe having a main engine and pusher propeller as customarily applied in autogyros, and a lifting rotor having an auxiliary drive for the lifting rotor for...
4613096 Helicopter protector  
A helicopter protector designed to protect the exterior of a helicopter from exposure to the elements and at the same time allow servicing of the helicopter. The protector utilizes the main rotor...
4609167 Helicopter cargo rack  
In the transportation by helicopter of specialized cargo externally, such stokes litters, personnel carriers, auxilliary fuel tanks, gun mounts, and the like, it is frequently necessary to switch...
4609165 Helicopter auxiliary energy system  
Autorotation in helicopters at low altitudes can be achieved even when the inherent design of the helicopter would prohibit successful entry into the autorotation mode. Angular kinetic energy from...
4608497 Ocean wave energy converting vessel  
An ocean wave energy converting vessel which can remain perpendicular to the ocean waves for maximum energy conversion, regardless of its direction of travel. As either end of the quadrapod is...
4598887 Rotary wing flying craft  
A rotary wing flying craft has at least two rotor blades rotatable around a normally vertical axis, at least one driving means for driving the rotor blades and a cabin for receiving loads. In...
4596367 Horizontal wind/water wheel with vertical lift a superior protype model  
A rotary fluid propelled device employing a natural theory of constriction and controlled redistribution to convert fluid flow to rotary mechanical energy. Two conical shell-shaped compartments...
4593870 Energy absorbing composite aircraft structure  
An energy absorber is provided. The energy absorber includes a thin panel (78) formed of composite materials (84) for reacting compression forces in the plane of the panel (78) between two opposed...
4588148 Helicopter rescue device  
A helicopter rescue device having a catwalk cantilevered outwardly from the front end of the helicopter. A plurality of upright stanchions are provided along each side of the catwalk with one or...
4583704 Pneumatic system structure for circulation control aircraft  
A plenum for a circulation control rotor aircraft which surrounds the rotor drive shaft (18) and is so constructed that the top (32), outer (38) and bottom (36) walls through compressed air is...
4574360 Helicopter weight measuring system  
A helicopter weight measuring system for detecting the loaded weight of a helicopter operating under partial or full hover conditions while the wheels of the helicopter are contacting the ground...
4550812 Fixed position, fixed frequency pendular-type vibration absorber with frequency linearization  
A fixed frequency vibration absorber adapted to be fixedly mounted in a fixed vibration prone system. The vibration absorber is of the pendular-type with two dynamic masses suspended in pendular...
4551723 Excessive descent rate warning system for rotary wing aircraft  
A warning system for providing an aural warning to the pilot of a rotary wing aircraft monitors the altitude above ground and barometric descent rate of the aircraft and generates the warning if...
4531695 Composite helicopter fuselage  
A composite helicopter fuselage comprises at least one main frame member having two generally vertical side beams joined by generally horizontal top and bottom beams. Each side beam comprises a top...
4528564 Warning device for helicopters  
A warning device, for a helicopter with a tail rotor and a mechanical protection device (15) therefor, for giving warning if the helicopter tail approaches too closely the ground or an obstruction....
4506849 Helicopter rotor thrust ring  
A helicopter tail rotor (14) is provided with a thrust ring. The thrust ring comprises an annular airfoil (16) having a circular opening which is aligned coaxially with the rotor (14). The plane of...
4507050 Pneumatic valve control for circulation control aircraft  
A circulation control rotor system in which butterfly valves (44, 46) control the flow of compressed air from a plenum chamber (40) to the rotor blades (14). Each has an actuator (48, 52)...
4479619 Helicopter transmission systems  
A helicopter transmission system is disclosed in which drive from three engines is transmitted to two output channels each of which is divided by dividing means to drive two output pinions meshed...
4478379 Unmanned remotely piloted aircraft  
An unmanned aircraft of the remotely piloted type that is characterized by its configuration and outline using rigid counter rotating propellers, positioned substantially at the height of its...
4473199 Rotary wing aircraft  
A one-man helicopter comprising a fuselage having a rotor shaft attached thereto but offset therefrom, rotor blades having rocket engines in the tips thereof, a hub on the shaft and means on the...
4458860 Rotary wing aircrafts  
Rotary wing aircrafts comprise a fuselage having a rotor driving mast extending substantially vertically. A rotor comprising a plurality of rotors is mounted on the mast for at least feathering and...
4447023 Apparatus for mounting a device above a helicopter rotor  
A helicopter (10) incorporates apparatus (15) for mounting a device such as an aerial or a sight (14) above a main sustaining rotor (13). The apparatus comprises first and second ring gears (16,...
4434956 Flexible helicopter rotor and pitch control mechanism  
A flexible helicopter rotor includes a vertical rotor axle, a mechanism for rotating the vertical rotor axle in a first rotational direction, and a plurality of segmented flexible airfoils secured...
4407467 Tactical wire-cutter system for helicopters  
A tactical wire-cutting system for helicopters includes a forwardly extending probe having a plurality of explosive cutting charges disposed along the probe. The probe is inclined with respect to...
4407466 Jet nozzle rotary wing aircraft  
A rotary wing aircraft is disclosed and includes a fuselage, a gas turbine engine operated air compressor within the fuselage, and a jet nozzle driven rotor assembly situated over the fuselage and...
4405103 Hydraulically operated air borne rotor craft  
A helicopter-like craft has plural propellers with substantial vertical axes which can be inclined forwardly to provide the forward movement of the vehicle. The propellers are driven by hydraulic...
4379217 Method and means of melting frozen material on terrain or water surfaces  
A heat ray emitting means, preferably a laser beam transmitter, is mounted on the undercarriage of a helicopter. The heat ray emitting means is mounted on a turret on the undercarriage of the...
Matches 201 - 250 out of 436 < 1 2 3 4 5 6 7 8 9 >