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"What can be more palpably absurd than the prospect held out of locomotives traveling twice as fast as stagecoaches?"
The Quarterly Review ; March edition, 1825
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| Number | Title | Issue Date |
| 8092189 | Axial flow pump Radial cross sections of front sides in rotational direction of impellers attached to a pump shaft obliquely to a circumferential direction from an upstream side toward a downstream side have concave shapes protruding toward the upstream side, and radial cross secti... | 01/10/2012 |
| 8079823 | Fan blades A fan blade comprises an airfoil having an upper surface with region that has a generally elliptical curvature. In some examples, the lower surface has a convex region and a concave region. The curvature of the concave region corresponds with the generally elliptica... | 12/20/2011 |
| 8052395 | Air cooled bucket for a turbine A bucket for a turbine is provided. The bucket includes an airfoil having a root portion, a tip portion, an airfoil shape, and a nominal profile substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in Table I, wherein Z is a distance... | 11/08/2011 |
| 7883324 | Wind turbine airfoil family A family of airfoils for a wind turbine blade. Each airfoil may include a blunt trailing edge, a substantially oval shaped suction side, and a substantially S-shaped pressure side. ... | 02/08/2011 |
| 7597544 | Blade of axial flow-type rotary fluid machine A first bent portion bent toward an intrados and a second bent portion located in the rear of the first bent portion and bent toward an extrados are provided on a camber line on a trailing edge in the rear of 90% of a chord length of a turbine blade having an extrem... | 10/06/2009 |
| 7374403 | Low solidity turbofan A turbofan includes a row of fan blades extending from a supporting disk inside an annular casing. Each blade includes an airfoil having opposite pressure and suction sides extending radially in span between a root and tip and axially in chord between leading and tr... | 05/20/2008 |
| 7344360 | Wind turbine rotor blade with in-plane sweep and devices using same, and methods for making same A wind turbine includes a rotor having a hub and at least one blade having a torsionally rigid root, an inboard section, and an outboard section. The inboard section has a forward sweep relative to an elastic axis of the blade and the outboard section has an aft swe... | 03/18/2008 |
| 7241114 | Rotor for a centrifugal pump The invention relates to a rotor having at least three blades disposed between a front cover plate and a rear cover plate, the art of the suction edge of at least one blade, in the top view of the inlet side of the pumping medium, following a sinusoidal path with a ... | 07/10/2007 |
| 7217101 | Turbine rotor blade for gas turbine engine A rotor blade for a gas turbine engine includes a blade root (3) and an aerofoil projecting therefrom, the aerofoil having a leading edge and a trailing edge (5), a generally concave pressure surface (2) and a generally convex suction surface ( | 05/15/2007 |
| 7210904 | Runner blade for low specific speed Francis turbine A runner for use as retrofit in existing Francis turbine water path includes a set of nine profiles covering crown (hub) to skirt (band) area is to produce power efficently at deteriorated head condition of site. Each of the nine profiles is made of two curves, name... | 05/01/2007 |
| 7210910 | Enhancements to high efficiency ceiling fan Twisted ceiling fan blades for low, medium and high speed operation of less than approximately 250 rpm. The novel blades twisted blades can be configured for 60″ and 64″ diameter fans, and have less blades (3 for example) than conventional flat type bladed fans ... | 05/01/2007 |
| 7204676 | Fan blade curvature distribution for high core pressure ratio fan A method for reducing vortex promotion of a rotor blade used in high core PR fans comprises shifting a curvature distribution of a blade section immediately adjacent to the hub such that a major turning of the suction side of the section is located near a trailing e... | 04/17/2007 |
| 7195456 | Turbine engine guide vane and arrays thereof An exit guide vane array for a turbine engine includes a set of guide vanes 28 having a solidity and defining fluid flow passages 74 with a chordwisely converging forward portion 80. The high solidity and convergent passage portion 80 res... | 03/27/2007 |
| 7179058 | Aerodynamically wide range applicable cylindrical blade profiles The present invention relates to the improved aerodynamic design of a pair of blade profiles valid over a wide range of flow regime. The so formed blades, pertain to high pressure, intermediate pressure and first few stages of low pressure cylinders of axial steam t... | 02/20/2007 |
| 7175393 | Transonic blade profiles The present invention relates to the aerodynamic design of moving blades, pertaining to later stages of axial steam turbines where the inlet flow is non-uniform over the blade height. The claim made herein is a set of six invented transonic blade profiles which can ... | 02/13/2007 |
| 7156612 | Spigot arrangement for a split impeller A spigot arrangement for split impeller (inducer and exducer) includes a recess of the exducer and means for reducing exducer blade root stresses and localized contact stresses between inducer and exducer. ... | 01/02/2007 |
| 7144223 | Supercavitating propeller with adjustable cup, and the method to adjust said cup The invention describes a supercavitating propeller with adjustable cup, and a method to adjust the cup. The trailing edge of the propeller blade is characterised by a protuberance with a limited section compared to the blade's section at the conventional trailing e... | 12/05/2006 |
| 7121807 | Axial-flow fan Disclosed is an axial-flow fan having a central hub coupled to a rotational shaft of a motor, a plurality of blades extending radially outwardly from the outer circumference of the hub for blowing air in an axial direction, the plurality of blades being integrated w... | 10/17/2006 |
| 7047167 | Blade shape designing method, program thereof and information medium having the program recorded thereon An initial set of individuals having design parameters of a blade as a gene, is determined at random (S12). Next, an analysis using Navier-Stokes equations is performed. On the basis of the analysis result, ranking (evaluation) of respective individuals are p... | 05/16/2006 |
| 7040859 | Wind turbine A wind turbine operable as either a vertical axis wind turbine or a horizontal axis wind turbine is disclosed. ... | 05/09/2006 |
| 7001143 | Cambered vane for use in turbochargers Improved cambered vanes comprise an inner airfoil surface oriented adjacent a turbine wheel, and an outer airfoil surface oriented opposite the inner airfoil surface. The inner and outer airfoil surfaces define a vane airfoil thickness. A cambered vane leading edge ... | 02/21/2006 |
| 6991426 | Variable pitch fan A variable pitch fan, particularly for propulsion, of the type comprising a rotor and at least two stages of stator blade rows positioned upstream and downstream of the rotor, wherein the rotor blades (8) are of the variable pitch type and have a sinusoidal s... | 01/31/2006 |
| 6991431 | Ceiling fan blade The present invention relates to a ceiling fan blade capable of producing full wind pressure and much wind. The solution of the present invention is to form a front and a rear wind receiving surfaces on the ceiling fan blade. A tangent angle of the rear wind-receivi... | 01/31/2006 |
| 6974309 | Straight wing type wind and water turbine A Straight blade type turbine has at least one two-dimensional blade positioned in parallel with and around a central axis of the turbine. The two-dimensional blade has a cross section with a blade chord turned around a center of the two-dimensional blade by an angl... | 12/13/2005 |
| 6955461 | Tickler for slurry reactors and tanks The present invention is directed to a tickler impeller and agitation system for use in stirred slurry reactors and storage tanks. The tickler impeller when mounted on a shaft is effective for providing an inward and downward swirl in a slurry medium which directs s... | 10/18/2005 |
| 6942458 | Variable pitch fan An improved variable pitch fan comprising a fan hub, with fan blades extending radially outward from the fan hub and mounted for rotation about respective radially extending axes corresponding to each fan blade. Each fan blade has a blade surface extending perpendic... | 09/13/2005 |
| 6910861 | Turbomolecular vacuum pump with the rotor and stator vanes A turbomolecular vacuum pump (1) has an inlet (3) and an outlet (4) and rotor and stator vanes (5 and 6), situated between the inlet and outlet. The rotor vanes (6) have front sides (11) and rear sides (12) in ... | 06/28/2005 |
| 6908287 | Axial flow fan Disclosed is an axial flow fan capable of achieving reduction of noise while having a high blowing efficiency compared to the power consumption of a motor adapted to drive the axial flow fan. The axial flow fan includes a hub, and a plurality of blades extending rad... | 06/21/2005 |
| 6899526 | Counterstagger compressor airfoil A compressor airfoil includes opposite pressure and suction sides joined together at leading and trailing edges and extending in span between a root and tip. The airfoil includes stagger increasing above the root and decreasing above a midspan pitch section thereof.... | 05/31/2005 |
| 6866414 | Sanitary mixing assembly for vessels and tanks The present invention provides component parts for a mixing assembly adapted to be used with clean in place techniques. The component parts may include an impeller assembly, an adjustable hub assembly and a steady bearing assembly. In one embodiment, the blades of t... | 03/15/2005 |
| 6802474 | Advanced high turning compressor airfoils In a high turning airfoil capable of being suitably applied to each of blades constituting a blade row of an axial flow-type compressor, both of an intrados generating a positive pressure and an extrados generating a negative pressure exist on one side of a chord li... | 10/12/2004 |
| 6749401 | Hydrodynamically and aerodynamically optimized leading edge structure for propellers, wings, and airfoils A novel concept for a propeller blade configuration incorporates the model of the natural wave behavior. The leading edge of the propeller blade has a convex segment followed by a concave segment, as seen in a plan view. The leading and trailing edges are rounded so... | 06/15/2004 |
| 6709233 | Aerofoil for an axial flow turbomachine A turbine stator vane for use in an axial flow gas turbine. The vane has an aerofoil, the pressure face of which is convex between platform and tip regions in a plane which extends both radially of the turbine and transversely of the general working fluid flow direc... | 03/23/2004 |
| 6672839 | Fan wheel An electric fan having an electric motor and a fan wheel connected to the electric motor. The fan wheel has a hub and fan blades extending from the hub. The fan blades include a proximal section at the hub, a distal section and a middle section. The proxi... | 01/06/2004 |
| 6638021 | Turbine blade airfoil, turbine blade and turbine blade cascade for axial-flow turbine A turbine blade for an axial-flow turbine includes an intrados generating a positive pressure, and an extrados generating a negative pressure, wherein the intrados and the extrados are provided between a leading edge and a trailing edge. An inflection poi... | 10/28/2003 |
| 6499942 | Turbomolecular pump and vacuum apparatus A turbomolecular pump capable of maintaining a maximum discharge rate even in a higher pressure has rotor blades or stator blades formed such that surface angles on a first surface of the blades facing the direction of rotation differ between an inlet por... | 12/31/2002 |
| 6361279 | Blade profile for aircraft rotor and rotor comprising same The invention concerns a blade profile for aircraft rotor, comprising, between a leading edge (1A) and a trailing edge (1B), a suction face (2) and a blade face (3) whereof the geometric locus of the equidistant points of the latter defines the curvature.... | 03/26/2002 |
| 6341942 | Rotator member and method A rotator member, for example an airfoil of a rotating blade, is provided with additional stiffness in a radially outer portion of the member by including in the outer portion at least one corrugation extending generally along the width, for example chord... | 01/29/2002 |
| 6338609 | Convex compressor casing A compressor casing includes an axially convex inner surface for surrounding a row of rotor blades with radial gaps therebetween. The tip of the blades complement the casing contour for reducing blade tip losses and flow blockage.... | 01/15/2002 |
| 6331100 | Doubled bowed compressor airfoil A compressor airfoil includes pressure and suction sides extending from root to tip and between leading and trailing edges. Transverse sections have respective chords and camber lines. Centers of gravity of the sections are aligned along a double bowed st... | 12/18/2001 |
