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4459083 Shapes for rotating airfoils  
This invention is an airfoil which has particular application to the blade or blades of rotor aircraft and aircraft propellers. The airfoil thickness distribution, camber and leading edge radius...
4451207 Turbine rotor for a flow meter  
A turbine rotor for a flow meter comprises a cylindrical rotor disk having a rotor axis, a plurality of rotor vanes extending radially from the rotor disk and a flat surface between the bases of...
4434957 Low drag surface  
A low drag surface comprises at its upstream edge an intermittent linear vortex producing means extending transverse to the flow of fluid across the surface. The vortex producing means produces a...
4431376 Airfoil shape for arrays of airfoils  
A flow directing assembly 14 having an airfoil section or shape 28 of the type adapted for use in an axial flow gas turbine engine is disclosed. The cambered meanline MCL of the airfoil shape is...
4428213 Duplex peening and smoothing process  
Disclosed is a two step process of peening for workpieces having small radii fillets or fragile edges, such as gas turbine airfoils have. In the first step, relatively small size shot of less than...
4416434 Blade section for rotating wings of an aircraft  
The present invention relates to a blade section for rotating wings of an aircraft comprising, between the leading edge and the trailing edge, a convex lower surface and an upper surface which is...
4412664 Family of airfoil shapes for rotating blades  
This invention is an airfoil which has particular application to the blade or blades of rotor aircraft such as helicopters and aircraft propellers. The airfoil thickness distribution and camber...
4411598 Fluid propeller fan  
A fluid propeller fan useful as but not limited to an air-circulating cooling fan for an automotive engine, wherein each of the vanes of the fan has a pitch angle which is gradually reduced from...
4408952 Lateral channel pump  
In a lateral channel pump, the rotor blade compartments of a ring of blades in the rotor alternate in length, toward the center of the rotor, between long and short rotor blade compartments. The...
4392781 High performance blade for helicopter rotor  
The present invention relates to a high performance blade for helicopter rotor presenting an aerodynamic surface produced by profiles of which the aerodynamic twist increases from the end profile...
4379813 Propellers and windmills  
The present invention provides a propeller or windmill blank comprising a planar sheet of material having markings defining, or being shaped to have, a central or hub region and two blades...
4370097 Noise reduction means for prop-fan  
A prop-fan of the type having a high solidity factor (1 or greater) near the root fairing to a lower solidity factor (less than 1) near the tip and operable over a critical Mach No. range is...
4331429 Symmetrical propeller  
A propeller (18) having an exhaust discharge passage (22) through the propeller hub has blades (24) symmetrical in thickness about the nose-tail pitch line and symmetrical in plan form about a...
4329175 Products made by powder metallurgy and a method therefore  
An article such as a gas turbine rotor blade or bladed rotor is made by consolidation of metal powders contained in a mould using the technique of hot isostatic pressing. Different properties are...
4325675 Blade profile for rotary wing of an aircraft  
The present invention relates to a blade profile for rotary wing of an aircraft, comprising, between the leading edge and the trailing edge, a convex upper surface and a non-concave lower surface,...
4314795 Advanced airfoils for helicopter rotor application  
A family of airfoils for use in rotary wing aircraft, particularly helicopters, is disclosed. The family is characterized by having a maximum c1<1unull>s at M=0.4 and maximum delay in...
4240598 High performance aerodynamic airfoil for aircraft wing  
The invention relates to a high performance aerodynamic airfoil for aircraft wing, wherein the airfoil is biconvex and is such that the corresponding wing comprises an advanced maximum total...
4221538 Rotary transducers  
A rotary transducer adapted to be driven in the same direction by air flow therethrough in either axial direction comprises a rotor having blades of aerofoil cross-section which are fixed with...
4202655 Propeller fan blading and hub therefor  
Propeller and fan blading comprised of an extruded airfoil having a rib retained at the root for mounting and with a portion thereof removed by flattening the back of the blade truncating the back...
4173995 Recirculation barrier for a heat transfer system  
A heat exchanger apparatus for a liquid-cooled internal combustion engine including a radiator axially spaced from the engine, an engine-driven, suction-type fan axially spaced intermediate the...
4171183 Multi-bladed, high speed prop-fan  
A small diameter, highly loaded multiple bladed variable pitch propulsor having swept blades with thin advanced airfoil sections, integrated with a nacelle contoured to retard the airflow through...
4150301 Wind turbine  
An improved fluid driven turbine blade system is provided, which is self-governing at relatively high fluid velocities. This is achieved by a combination of two sets of turbine blades, one having...
4147437 Mixer blade  
An impeller for producing a stirring action within a fluid medium contained in a vessel includes blades, each blade being shaped to produce a variation in the lift coefficient of the impeller from...
4142844 Fan blade assemblies for box fans  
A box fan comprising a box-like structure having front and rear openings interconnected to form a duct passing through said structure, said duct containing an electric motor and a large axial...
4142837 Helicopter blade  
A helicopter blade of improved airfoil shape which reduces or eliminates retreating blade stall by reducing the magnitude of the upper airfoil blade surface peak pressure and distributes it over a...
4135858 Method of producing propeller blades and improved propeller blades obtained by means of this method  
A propeller blade is rotatable about an axis of rotation and has a leading edge and a trailing edge. The blade has a configuration such that for any fixed point on the leading edge of the blade γ...
4123198 Propeller  
The propeller includes a central hub with a plurality of blades extending radially from equal circumferentially spaced points on the periphery of the hub. The width of each blade at its root is...
4120609 Sheet metal fan  
A sheet metal fan blade of improved performance and efficiency has a varying camber angle and chord angle along radial positions of the blade, such that the angle of attack along at least 70% of...
4101712 Method of producing a material with locally different properties and applications of the method  
A method of producing a material with locally different properties comprises filling a form with at least two different component powders such that the ratio of contents of said powders in the...
4073601 Marine propeller  
A marine propeller with unique blade geometry resistant to cavitation and ventilation at high speed operation. The face of the blade has a special convexly curved portion extending from the...
4063852 Axial flow impeller with improved blade shape  
An axial flow impeller for low pressure ratio applications in the range 1.03 and below and comprising a hub carrying a plurality of similar circumaxially arranged air moving blades. Each blade has...
4058880 Propeller making apparatus and method  
Apparatus and method for making propellers having a base plate with an upstanding central shaft for receiving a blank propeller hub. A plurality of blocks are radially arranged on the plate about...
4047841 Propeller blading for a self-adjusting propeller for boats  
A self-adjusting propeller for sailing-boats comprises a propeller body mounted on a drivable rotary shaft and propeller blades rotatably mounted on the propeller body. These propeller blades are...
4046489 Aerodynamic fan blade  
Disclosed is a multi-blade fan assembly and method for manufacture, the fan assembly having a central hub having means for being attached to a driving assembly and having a plurality of fan blades...
4012907 Exhaust apparatus  
A device for securement to or incorporating into the exhaust assembly of an internal combustion engine to improve efficiency thereof is disclosed. The device comprises a generally tubular housing...
4012172 Low noise blades for axial flow compressors  
A rotor blade configuration is disclosed which greatly reduces noise generated by the low pressure compressor, or fan, of a turbofan engine. The leading edge of the blade is swept forwardly from...
3989406 Method of and apparatus for preventing leading edge shocks and shock-related noise in transonic and supersonic rotor blades and the like  
This disclosure is concerned with novel rotor blade and similar foil designs that, by critical skewing of intermediate blade regions where the airflow is supersonic, prevents leading edge shocks...
3982853 Folding boat propeller  
A folding boat propeller assembly having a hub and two blades. The radially inner portion of each blade is pivoted to the hub. Upon forward movement of the boat, the blades will automatically be...
3951611 Blank for fan blade  
A one-piece blank for a propeller fan having a plurality of substantially identical blade portions extending outwardly from a central hub portion, each of the blade portions having leading and...
3947148 Fan assemblies  
The disclosure relates to a fan assembly including a duct in which an axial flow fan is mounted, there being a plurality of apertures formed in the duct wall around the fan and a layer of acoustic...
3946688 Hydrodynamic sections  
A method of designing hydrodynamic sections having improved characteristics is described wherein a desired pressure profile and boundary layer conditions for the surface of an undefined section...
3934860 Apparatus for the treatment of meat products  
A method for preparing non-perishable shaped meat products including ham products with fat and rind, involves subjecting chunks of meat, with or without fat or rind, to a stirring treatment which...
3915106 Hydrofoil with lift control by airfreed for watercraft  
A hydrofoil for watercraft provided with air exit apertures at the under pressure regions of the hydrofoil and extending at least partially over the foil span. Ducts are provided internally of the...
3890062 Blade transition for axial-flow compressors and the like  
A transition of improved design for joining the merging surfaces of the airfoil and platform of an axial-flow compressor blade of the cantilevered type. The transition as viewed in profile is a...
3887300 Mixer impeller  
Mixer impeller blades of hat-section cross section are secured to bracket arms which project radially from an impeller shaft. A cover plate extends across the hat-section cavity and is fastened to...
3854845 PROPELLER HAVING ANGULARLY DISPOSED TIP  
A propeller which is given increased efficiency and rendered more silent in operation by shaping its tip edges to have, in addition to the usual pitch angularity, a second angularity causing the...
3851994 BLADING FOR AXIAL FLOW TURBO-MACHINE  
Turbine blading for the rotors of turbo-machines of the axial-flow type in which the blades are twisted to allow for a high ratio of external to internal diameter of the flow passageway, the...
3846082 PRODUCTION OF CRYSTALLINE BODIES OF COMPLEX GEOMETRIES  
3836130 LIQUID AERATING APPARATUS  
An apparatus for aerating liquid including an upwardly extending throat having an impeller for pumping liquid upwardly through the throat and a diffuser overlying the upper end of the throat to...
3829240 ADVANCED GEOMETRY MAIN ROTOR BLADE  
A rotor blade for a convertiplane characterized by twist rate which is nonlinear but monotonic from blade root to blade tip and by camber nonlinear from blade root to provide a lift due to camber...