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| Number | Title | Issue Date |
| 8435008 | Turbine blade including mistake proof feature A turbine blade includes a platform, an airfoil located on one side of the platform, and a base located on an opposite side of the platform. The base includes an attachment portion that is receivable in a blade retention slot of a turbine disk and a shelf located ou... | 05/07/2013 |
| 8287241 | Turbine blade platform trailing edge undercut A gas turbine blade having reduced stresses around a regions where the airfoil training edge joins the platform is disclosed. The lower stresses are achieved due to an undercut region proximate the blade trailing edge being placed in the platform. The undercut regio... | 10/16/2012 |
| 8007245 | Shank shape for a turbine blade and turbine incorporating the same A turbine includes a turbine wheel having a plurality of buckets, each of the buckets including a bucket airfoil, a bucket dovetail to connect the bucket to a turbine wheel and a shank shape to connect the airfoil to the bucket dovetail, the shank having an uncoated... | 08/30/2011 |
| 7946827 | Blades A blade for a gas turbine engine includes a root portion, an aerofoil portion and a transition portion between the root portion and the aerofoil portion. The aerofoil portion and the transition portion are defined by first and second wall members, the first and seco... | 05/24/2011 |
| 7549846 | Turbine blades A turbine blade is provided for use in a gas turbine engine. The turbine blade has a platform, an airfoil radially extending from the platform, and an attachment portion comprising an asymmetric root neck portion having a higher stress side and a lower stress side. ... | 06/23/2009 |
| 7438533 | Wind turbine rotor blade A rotor blade for a wind turbine includes a flange section configured to connect the rotor blade to a rotor hub. The flange section is formed from a hybrid material including glass fibers and carbon fibers embedded in a matrix material. The carbon fibers are oriente... | 10/21/2008 |
| 7422419 | Propeller blade retention system A propeller blade mounted with a preload adjacent a propeller blade root retention that increases the moment capacity of the retention for a given pitch diameter, yet permits pitching of the propeller blade about a blade axis in response to a propeller pitch change ... | 09/09/2008 |
| 7357624 | Rotor blade for a wind power plant The invention concerns a rotor blade of a wind power installation and a wind power installation. One advantage of the present invention is to provide a rotor blade having a rotor blade profile, and a wind power installation, which has better efficiency than hitherto... | 04/15/2008 |
| 7252481 | Natural frequency tuning of gas turbine engine blades A tuning notch is defined preferably in the back of a blade root to tune the blade natural frequency in a gas turbine engine. ... | 08/07/2007 |
| 7165944 | Compressor blade with dovetail slotted to reduce stress on the airfoil leading edge A blade of an axial compressor comprising: an airfoil is disclosed that has a leading edge and a root; a platform attached to the root of the airfoil; a dovetail attached to a side of the platform opposite to the airfoil; a neck of the dovetail adjacent the platform... | 01/23/2007 |
| 7128537 | Rotor blade for a flow machine, and an associated pulling-off tool A rotor blade (1) for a flow machine includes an aerodynamic blade (2) and a foot (3). The foot (3) has an anchoring section (5) on a side facing away from the blade (2). A rotor (4) of the flow machine has an axial a... | 10/31/2006 |
| 7121802 | Selectively thinned turbine blade A turbine blade includes an airfoil, platform, shank, and dovetail. The platform includes a first side disposed along the pressure side of the airfoil, and an opposite second side disposed along the airfoil suction side. The platform second side includes an integral... | 10/17/2006 |
| 7097429 | Skirted turbine blade A turbine blade includes an airfoil, platform, shank, and dovetail. The shank includes opposite forward and aft faces corresponding with leading and trailing edges of the airfoil, and opposite first and second sides corresponding with pressure and suction sides of t... | 08/29/2006 |
| 7090466 | Methods and apparatus for assembling gas turbine engine rotor assemblies A method facilitates assembling a rotor assembly for gas turbine engine. The method comprises providing a first rotor blade that includes an airfoil, a platform, a shank and a dovetail, coupling the first rotor blade to a rotor shaft using the dovetail, and coupling... | 08/15/2006 |
| 6957948 | Turbine blade attachment lightening holes The present invention seeks to provide a turbine blade with increased creep capability for both uncooled and cooled turbine blades while generally maintaining operating stress levels at an interface region between the turbine blade and a turbine disk. A turbine blad... | 10/25/2005 |
| 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 |
| 6666651 | Composite propeller blade with unitary metal ferrule and method of manufacture Composite blade assembly 10 for a propeller assembly for an airplane, including unitary metal ferrule 50 attached to a fiber-reinforced composite blade 20; and a method for manufacturing blade assembly 10. Internal pressure molding includes unitary ferrul... | 12/23/2003 |
| 6506016 | Angel wing seals for blades of a gas turbine and methods for determining angel wing seal profiles A gas turbine has buckets rotatable about an axis, the buckets having angel wing seals. The seals have outer and inner surfaces, at least one of which, and preferably both, extend non-linearly between root radii and the tip of the seal body. The profiles ... | 01/14/2003 |
| 6450769 | Blade assembly with damping elements The present invention relates to a blade assembly with damping elements, which comprises a rotor (5) and blades (6) which are installed on the circumference of the rotor and have a blade platform (7), shank (14) and root (8). A damping element (9) is arra... | 09/17/2002 |
| 6435834 | Bucket and wheel dovetail connection for turbine rotors A multiple hook dovetail connection for connecting a rotor wheel and a bucket of a turbine rotor that permits the use of wider vanes at the ends of the buckets without changing the size of the wheel and the other existing components of the turbine. The do... | 08/20/2002 |
| 6435833 | Bucket and wheel dovetail connection for turbine rotors A multiple hook dovetail connection for connecting a rotor wheel and a bucket for a turbine rotor that permits the use of wider vanes at the ends of the buckets without changing the size of the wheel and the other existing components of the turbine. The d... | 08/20/2002 |
| 6290464 | Turbomachine rotor blade and disk This invention relates to a blade of a turbomachine, more particularly an axial-flow high-pressure turbine, having at least one integrated cooling air duct issuing at the downstream back of the blade root when viewed in the direction of the working gas co... | 09/18/2001 |
| 6250886 | Axial flow fan and fan blade The present invention provides an axial flow fan and fan blade. A true tapered, twisted airfoil section is constructed by cutting a flat piece of light alloy to a unique shape to obtain a flat pattern representative of a selected airfoil design, forming t... | 06/26/2001 |
| 6190128 | Cooled moving blade for gas turbine A cooled moving blade for a gas turbine which has a blade profile capable of more effectively reducing thermal stress in a blade base portion and, thus, preventing cracks from occurring. A moving blade (1) is fixedly secured to a platform (2). On the othe... | 02/20/2001 |
| 6176681 | Rotor blade with improved attachment on a hub of a fan A rotor blade attached on a hub of a fan includes a blade-part, produced essentially of a composite material of fiber reinforced plastic, and an integrated foot having at least one body for attachment of the rotor blade on the hub of the fan, and at least... | 01/23/2001 |
| 6126398 | Two-piece rotor blade for a bearingless rotor of a helicopter A rotor blade for a bearingless rotor of a helicopter includes a lift-generating airfoil blade, a flexbeam connecting the airfoil blade to a rotor head, and a control sleeve enclosing the flexbeam. The junction between the flexbeam and the airfoil blade i... | 10/03/2000 |
| 6056838 | Method for manufacturing a variable-pitch composite blade for a helicopter rotor The method comprises the following steps: producing a preform of the blade comprising a blade root section for connection to a hub and an aerodynamically profiled main blade section, the blade root section of the preform including at least one cylindrical... | 05/02/2000 |
| 6019580 | Turbine blade attachment stress reduction rings A turbine or compressor disk assembly comprises a plurality of blades attached to a central hub by means of the blade root of each blade engaging a corresponding slot in the hub. According to the principles of the present invention, a turbine or compresso... | 02/01/2000 |
| 6004101 | Reinforced aluminum fan blade A gas turbine engine fan blade includes an airfoil and dovetail having an integral aluminum core and a fatigue resistant reinforcing sheath.... | 12/21/1999 |
| 5954474 | Hydro-turbine runner A turbine, disposed in water flowing therethrough, includes a hub and associated runner blades. Each blade comprises an inner surface and a distal outer surface, a leading edge and a trailing edge separated by a water directing surface. Each blade is rota... | 09/21/1999 |
| 5501576 | Static efficiency enhancer for axial fans A static efficiency enhancer for an axial fan having a hub and a plurality of blades extending radially outward from the hub, the enhancer comprising a plurality of airfoils connected to the hub and extending outwardly therefrom to provide additional air ... | 03/26/1996 |
| 5490764 | Unshrouded blading for high bypass turbofan engines Metal alloy fan blades reinforced with a metal matrix composite for enhancing stiffness of the fan blades without a significant weight penalty, and which are suitable for use in high bypass turbofan engines. The metal matrix composite is bonded to each fa... | 02/13/1996 |
| 5462408 | Blade made of thermoplastic composite, in particular for ducted tail rotor of a helicopter, and its method of manufacture The blade has its lower-surface and upper-surface skins of its shell, its front and rear filling bodies and its spar made of a composite material having the same thermoplastic matrix, preferably made of PEEK, reinforced preferably with carbon fibres. The ... | 10/31/1995 |
| 5454693 | Blade made of thermoplastic composite, in particular for ducted tail rotor of a helicopter, and its method of manufacture with injection step The blade has its lower-surface and upper-surface skins of its shell, its front and rear filling bodies and its spar made of a composite material having the same thermoplastic matrix, preferably made of PEEK, reinforced preferably with carbon fibres. The ... | 10/03/1995 |
| 5443365 | Fan blade for blade-out protection In a turbofan engine a fan designed for reduced damage during a blade-out condition wherein the fan blade airfoil is disposed asymmetrically on the platform and includes a forwardly displaced leading edge. The platform is configured to make early contact ... | 08/22/1995 |
| 5435694 | Stress relieving mount for an axial blade The present invention relieves the stress at a fillet of a blade shank using at least one axially extending pocket on the shank near an axially extending fillet of a shank to root interface or a shank to platform interface on a pressure or suction side of... | 07/25/1995 |
| 5173023 | Wind turbine generator blade and retention system A propeller blade cuff having a root end and a first annular flange at the root end, and a wind turbine generator hub having a second annular flange to be attached to the first flange comprising a clamp ring having multiple sections, the sections having f... | 12/22/1992 |
| 5118257 | Boot attachment for composite turbine blade, turbine blade and method of making turbine blade A root attachment for a turbine blade is integrally molded with a composite turbine blade for a ram air turbine. The root attachment includes an insert at the one end of the root attachment for integrally molding within the blade and a hub connector at an... | 06/02/1992 |
| 5118256 | Blade retention apparatus with elastomeric preload Preloading and retention of a variable-pitch, light-weight propeller blade (10) are achieved through a retention assembly wherein the blade shank (20) is retained within a hub arm (24) with an inboard angular contact pitch change bearing (30) and an outbo... | 06/02/1992 |
| 5096384 | Plastic fan blade for industrial cooling towers and method of making same A molded, composite, airfoil-defining, synthetic resin blade for large diameter cooling tower fans is disclosed wherein a moderately dense synthetic resin foam core is first formed that is generally of the same size and shape as the final desired blade. A... | 03/17/1992 |
