Matches 1 - 50 out of 168 1 2 3 4 >
Match Document Document Title
7618232 Compressor comprising a plurality of cells reconstituting an annular volume of separation of flows in a turbine engine  
This turbine engine compressor comprises a separating nose extended by inner and outer annular walls defining in cooperation an annular volume (V) of separation of a primary flow (F 1 ) and a...
7585153 Upper rotor control system for a counter-rotating rotor system  
An upper rotor control system is contained within an upper rotor shaft and upper hub assembly of a contra-rotating rigid rotor system. A collective servo assembly includes a hydraulic actuator that...
7458773 Turbomachine with contrarotating fans  
A turbomachine comprising: a gas generator for producing combustion gas; a turbine section through which the combustion gas passes and comprising first and second rows of contrarotating turbine...
7264199 Unloaded lift offset rotor system for a helicopter  
A rotor system ( 12 ) for a helicopter ( 10 ) includes a rotating shaft ( 82 ). A gimbaled hub assembly ( 56 ) is coupled to the rotating shaft ( 82 ). Rotating blades ( 24 ) and non-rotating...
7234914 Apparatus and method for enhancing lift produced by an airfoil  
A compressor or pump employs principles of unsteady delayed stall to enhance the head increase produced by the compressor or pump. Plural airfoil-shaped lifting elements are spaced from each other...
7153101 Pulling marine propeller  
A pulling marine propeller ( 1 ) including multiple propeller blades ( 4 ) attached to a propeller hub ( 5 ). The propeller hub ( 5 ) is attachable to a propeller shaft ( 9 ) extending from a drive...
7056092 Modular propeller  
A modular propeller comprises a center hub with an integrated front cap and an aluminum core encapsulated with fiber-reinforced composite polymer resin. A set of replaceable blades have bases that...
6994071 Two-cycle engine for counter-rotation especially for aviation applications  
A counter-rotating 2 cycle piston engine with a combustion chamber and an output shaft rotatably mounted to rotate independently about the same propeller centerline of an aircraft. The Internal...
6928977 Adapter, to interface counter-rotating torque producing engine mechanisms with stationary support accessories, for torque free output and torque sensitive environments  
The present invention is a novel hydraulic/electric, rotating interface for torque producing engines, including internal combustion engines, which enables a rigidly mounted motor to isolate the...
6763654 Aircraft gas turbine engine having variable torque split counter rotating low pressure turbines and booster aft of counter rotating fans  
A gas turbine engine turbine assembly includes a high pressure spool having a high pressure turbine drivingly connected to a high pressure compressor by a high pressure shaft which is rotatable...
6761144 Rotary engine with counter-rotating housing and output shaft mounted on stationary spindle  
A counter-rotating rotary-piston engine has an output shaft with a cylindrical inner cavity rotatably mounted on a single support spindle in the frame of an aircraft. The output shaft extends...
6736600 Rotor with a split rotor blade  
A rotor through which a fluid flows in a main direction of flow, provided with at least one rotor blade, the rotor blade being arranged to rotate about a rotor axis. The rotor blade extends away...
6684626 Aircraft gas turbine engine with control vanes for counter rotating low pressure turbines  
An aircraft gas turbine engine includes a low pressure turbine having a low pressure turbine flowpath and counter rotatable low pressure inner and outer shaft rotors having inner and outer shafts,...
6666017 Counterrotatable booster compressor assembly for a gas turbine engine  
A counterrotatable booster compressor assembly for a gas turbine engine having a counterrotatable fan section with a first fan blade row connected to a first drive shaft and a second fan blade row...
6406261 Counter propeller propulsion unit  
A propeller propulsion unit comprising a prime mover, propellers, and rotating force transmission for transmitting the rotating force of the prime mover to the propellers, wherein a counter...
6381948 Driving mechanism with counter-rotating rotors  
An engine with counter-rotating rotors, which are coaxially arranged and are driven via a shaft by a turbine whose working medium is supplied by a gas generator with an air inlet, the air inlet ( 3...
6341419 Loop stacked rotor assembly  
A plurality of rotors are individually measured for determining relative eccentricity between forward and aft annular mounting ends thereof. The measured rotor eccentricities are stacked...
6299495 Airboat transmission, lubrication system, and associated method  
A gear-based airboat transmission is provided for driving a pair of coaxial, counter-rotating propellers. The transmission includes a fore output gear rotatably affixable within a housing and...
6193466 Counter rotating bypass propeller  
A propulsion device having fins rotating in opposing directions which are adjustable to avoid collision yet which provide opposing strokes similar to fishtails. At least one adjustable fin is...
6193189 Rotary engine and helicopter application  
In a rotary engine having rotating cylinders which burns a fuel which is not mixed with oil there is a real problem of centrifugal force form the rotating engine causing oil to flow into the...
6176750 Marine propulsion unit with hydraulic pump  
An improved hydraulic system for a twin propeller marine propulsion unit. A vertical drive shaft is operably connected to the engine of the propulsion unit and carries a pinion that drives a pair...
6082967 Constant-speed twin spool turboprop unit  
A constant-speed twin spool turboprop unit including a twin spool gas generator having a low-pressure spool and a high-pressure spool each including a compressor and a turbine which drives the...
6062926 Hydraulic system for a dual propeller marine propulsion unit  
An improved hydraulic system for a twin propeller marine propulsion unit. A vertical drive shaft is operably connected to the engine of the propulsion unit and carries a pinion that drives a pair...
6053663 Device for creating a local water flow  
5954479 Twin engine, coaxial, dual-propeller propulsion system  
A twin engine, coaxial, dual-propeller propulsion system employing a unique transmission having two independent drive trains. The first of the two engines exclusively drives a first drive train,...
5890938 Marine counter-rotational propulsion system  
A marine propulsion system with counter-rotating propellers is provided with the capability of causing the propellers to rotate at different speeds. A first gear is attached to an inner propeller...
5839928 Shifting mechanism for outboard drive  
A shifting mechanism for an outboard drive of a watercraft provides reduced coupling shock when the forward gears are engaged by a dual clutch assembly, as well as provides for consistent and quick...
5820345 Split rotor shaft driven lift fan  
A split fan for providing lift for an aircraft is described. In one embodiment, a main engine shaft extends to the split fan, and a portion of the split fan is located at an elevation above the...
5807151 Propeller for marine propulsion drive  
A blade design for a counter-rotating propeller system improves the performance of the outboard drive on which is it employed when the propellers are run partially exposed. The propeller system...
5795200 Contra-rotating rotor unit  
A marine propulsion unit has two contra-rotating propellers (15, 16) driven by a single shaft (25) through gearing which includes a set of static planetary gears (40), an external gear (30), and an...
5791592 Helicopter with coaxial counter-rotating dual rotors and no tail rotor  
A helicopter having two engines driving a single rotating drive shaft on which are mounted two spaced counter-rotating coaxial rotors at the same speed and having a tail boom free of a tail rotor...
5766047 Twin propeller marine propulsion unit  
A twin propeller marine propulsion unit for a watercraft. A vertical drive shaft operably connected to the engine is journaled for rotation in a lower gear case and carries a beveled pinion that...
5743489 Aircraft with two alternatingly operated propellers of different radius  
An aircraft has at least one drive motor coupled to first and second propellers for forward thrust of the aircraft. The first propeller is dimensioned for takeoff and landing conditions and for...
5558498 Propeller shaft assembly for marine propulsion system  
A simple structured propeller shaft assembly for a counter-rotating propeller system of a watercraft outboard drive prevents fishing line, weeds and like debris from entangling on a shaft of the...
5556313 Outboard drive transmission  
A transmission for a counter-rotating propeller system of a watercraft outboard drive includes a reduced friction coupling between the inner and outer shafts which permits transfer of the thrust...
5494466 Transmission for dual propellers driven by an inboard marine engine  
Transmission for a single engine drive for dual concentric propellers in a straight or V-drive arrangement with the straight-drive including four shafts and nine gears and the V-drive adding two...
5464324 Variable-pitch propeller or fan  
A variable-pitch propeller or fan comprises a hollow boss, a number of propeller blades fitted rotatably on the boss, and also an adjusting element which is axially slidable in the boss and has a...
5441388 Ship drive with two counterturning propellers  
A ship's drive with two counterturning propellers, the rear propeller of which is fastened to an inner shaft and the front propeller of which is fastened to the head end of a hollow shaft, which...
5352141 Marine drive with dual propeller exhaust and lubrication  
A marine drive (10) has a spool (36) positioned in the lower horizonal bore (28) and supporting a dual propeller shaft assembly (38, 40). An exhaust passage (130) includes a passage (132) in the...
5263898 Propeller blade retention system  
The invention concerns the mounting of propeller blades to a ring-shaped rotor. The blades are of the variable pitch type, and the shank of each blade extends through a respective hole in the...
5249995 Marine drive having two counter-rotating surfacing propellers and dual propeller shaft assembly  
A marine drive (10) has two counter-rotating surface operating propellers (12, 14). Inner and outer concentric counter-rotating propeller shafts (40, 42) are supported by a spool assembly (38)...
5242265 Aircraft pitch change mechanism  
A system for changing pitch in aircraft propfans is disclosed, in which a motor, located at a stationary position, changes pitch of the blades by of a gear train. Three features of the system are...
5240204 Lift generating method and apparatus for aircraft  
A lift generating method and apparatus for aircraft is provided which generates lift in forward flight, in vertical flight or while hovering. A disk (24) is positioned between first and second...
5232386 Counter rotating strut drive  
A strut mounted, counter rotation marine propeller propulsion system of the single engine is provided including a depending propeller shaft strut from which aligned front and rear propeller shafts...
5226350 Drive train assembly for a rotor assembly having ducted, coaxial counter-rotating rotors  
A drive train assembly for a rotor assembly having ducted, coaxial counter-rotating rotors includes a sprag clutch, an engine coupling subassembly, a transmission coupling subassembly, and a drive...
5224831 Fan blade protection system  
In one type of aircraft propulsion system, propeller blades are mounted on a ring which surrounds a turbine. An annular space exists between the turbine and the ring. If a propeller blade should...
5213471 Propeller pitch control  
The invention concerns a system for controlling an aircraft propeller. A hydraulic motor controls pitch of the propeller blades. The propeller blades are characterized by the absence of...
5190441 Noise reduction in aircraft propellers  
The invention concerns reduction of tip vortices in aircraft propellers, wherein a fence having anhedral or dihedral is attached to the blades of the propeller. Another form of the invention is...
5186609 Contrarotating propeller type propulsion system  
A contrarotating propeller type propulsion system having first and second output rotary cylinders which are carried individually on an outside support cylinder fixedly secured to a first support...
5174716 Pitch change mechanism  
The invention concerns a pitch change mechanism for an aircraft propeller in which a common ring gear (51) changes pitch of all propeller blades on a given rotor simultaneously. Motion of the ring...
Matches 1 - 50 out of 168 1 2 3 4 >