Class / Patent application number | Description | Number of patent applications / Date published |
029889600 | Propeller making | 6 |
20100162566 | TOOL, TOOL SET AND METHOD OF SETTING THE PITCH OF THE BLADES OF A MODEL PROPELLER - The invention relates to a tool for tuning the pitch of the blades of a model propeller ( | 07-01-2010 |
20100319194 | METHOD FOR PRODUCING INTEGRALLY BLADED ROTORS - A method for producing integrally bladed rotors comprises the following steps: a) defining and providing a blade profile of a blade to be manufactured with a pre-contour and a theoretical contour; b) producing at least two sectional planes of the blade profile, which sectional planes run vertically to a threading axis of the blade profile and of the blade to be manufactured; c) determining a point of rotation per sectional plane to produce an interval between the pre-contour and the theoretical contour that is approximately the same circumferentially, which points of rotation are located on a connecting line running parallel to the threading axis; and d) providing a base rotor body and electrochemically working the base rotor body in order to produce a raw blade with the blade pre-contour by movement of a hollow electrode into the base rotor body, the electrode movement including advancing motion along the connecting line superposed by rotation at the points of rotation, and which hollow electrode has an inner contour adapted to the pre-contour of the raw blade at least in an end area that is moved into the base rotor body. | 12-23-2010 |
20110010936 | AIRFOIL FOR A HELICOPTER ROTOR BLADE - An airfoil family for a helicopter rotor blade, designated SC362XX. SC362XX essentially removes the large lower surface suction peak associated with ‘drag creep’ at moderate lift coefficients while reducing the peak Mach number and shock strength at high lift/Mach number conditions. Another optional airfoil family for use at inboard regions of the helicopter rotor, which is designated SC3252XX airfoil family, is a relatively thicker airfoil section that includes a significant increase in thickness forward of the 30% x/c location to provide a relatively thick and rigid inboard section. The lift coefficient at which the drag divergence Mach number was optimized is the same in both families thereby readily providing application to a single rotor blade. | 01-20-2011 |
20110314673 | Rotor Blade of Model Rotorcraft, and Method of Manufacturing Rotor Blade - A rotor blade is constituted by roll-forming, in which, while feeding an elongated cylindrical aluminum alloy tubing having desired dimensions by means of a feeder that feeds the aluminum alloy tubing, pressure is applied to the aluminum alloy tubing from opposed two directions. More specifically, the rotor blade is constituted by roll-forming the aluminum alloy tubing such that a cross-section thereof viewed from one longitudinal end thereof has an airfoil section shape and an integral hollow structure is formed inside the aluminum alloy tubing. | 12-29-2011 |
20140237819 | METHODS FOR FAN ASSEMBLIES AND FAN WHEEL ASSEMBLIES - Fan assemblies, and in particular fan wheels and stator assemblies for fan assemblies, are disclosed. In one embodiment, the fan wheel includes a wheel back having an outer surface forming one of a curved dome-shape and a truncated cone-shape. The fan wheel may also include a plurality of fan blades radially spaced about and mounted to the outer surface of the wheel back. In one embodiment, each of the fan blades is formed from a segment of an airfoil-shaped aluminum extrusion defining at least one internal cavity. The fan blade first ends can be provided with a compound cut profile with at least one curved cut such that the first end of the blade is mounted flush to the wheel back outer surface. The stator assembly can also be provided with a plurality of stator blades formed from airfoil-shaped aluminum extrusion segments and provided with compound cut profiles. | 08-28-2014 |
20150013160 | METHOD FOR PRODUCING A PROPELLER BLADE FROM A COMPOSITE MATERIAL - A propeller blade, which can belong to a fan without covering by an external casing, includes two portions fitted into one another and of different materials, generally composite, to resist various stresses, heating coming from a rotor or impacts of solid bodies. An internal portion includes a blade core, a blade shank and possibly a foam lining, and a preform of an outside portion is assembled to it by surrounding it closely before being completely formed by receiving its resin, which is placed into polymerisation. A method for producing the propeller blade guarantees good assembly of the portions without defects of form, damage or deformation of a fiber weave. | 01-15-2015 |