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| Number | Title | Issue Date |
| 7186092 | Airfoil having improved impact and erosion resistance and method for preparing same A turbine airfoil having an improved impact and erosion resistance. The airfoil comprises: (a) a base segment having an impact resistant leading edge section proximate to the leading edge comprising a material having having a yield strength of least about 250 ksi an... | 03/06/2007 |
| 7112033 | Hygienic mechanical seal flushing system for pure liquids in sanitary centrifugal pumps A sanitary centrifugal pump with a hygienic mechanical seal flushing system. The pump has a housing with a pumping chamber defined therein. An impeller is at least partially contained in the housing and is connected to a shaft for rotation. The rotation of the impel... | 09/26/2006 |
| 6966751 | Turbine vibrator A turbine vibrator including a housing having a first end and a second end and a generally cylindrical internal surface forming a cylindrical central chamber. An end cap is attached to each end of the housing including one or more outlet ports in fluid communication... | 11/22/2005 |
| 6890145 | Vacuum pump A vacuum pump has a pump case having a gas suction port at an upper surface thereof, a rotor shaft mounted in the pump case for undergoing rotation, and a rotor connected to the rotor shaft for rotation therewith. The rotor has inner and outer circumferential surfac... | 05/10/2005 |
| 6709234 | Impeller shaft assembly system An impeller shaft assembly, coupler and molten metal pump are described, in which a coupling member is configured to be secured to a pump drive shaft and includes a socket part that is defined by a socket wall formed about and extending along an axis. The socket wal... | 03/23/2004 |
| 6296447 | Gas turbine component having location-dependent protective coatings thereon A gas turbine component includes a platform having a first coating on at least a portion thereof, where the first coating is a diffusion aluminide coating. An airfoil extends from the platform and has an external surface and an internal surface defining c... | 10/02/2001 |
| 6283714 | Protection of internal and external surfaces of gas turbine airfoils A gas turbine airfoil includes an internal cooling passage defined by an internal airfoil surface, and an external airfoil surface. The gas turbine airfoil is protected on both the internal airfoil surface and the external airfoil surface. The internal ai... | 09/04/2001 |
| 6250881 | Molten metal shaft and impeller bearing assembly A molten metal impeller having a base portion including a circumferential notch. The notch having a generally radial wall and a generally axial wall, at least one of the radial or axial walls including a plurality of grooves. A ceramic bearing ring is cem... | 06/26/2001 |
| 6135712 | Turbomachine with mutual braking of concentric shafts A coating (22) with a high coefficient of friction and low thermal conductivity covers a turbomachine low pressure shaft (12) in the vicinity (17) of a concentric high pressure shaft (11), in the area at which high friction contact between the two shafts ... | 10/24/2000 |
| 6126386 | Pump and medium circulation apparatus A pump has a rotor made of synthetic resin in a fixed housing which are adjacently arranged while forming a gap between the housing and the rotor to force-feed a medium containing water moisture, in which the rotor is made of a resol-type synthetic resin ... | 10/03/2000 |
| 6074166 | Pump The pump is formed by pump housing defining a pump housing cavity and a column housing defining an elongated cavity. The front of the column housing is coupled to the rear of the pump housing cavity. A shaft axially from the rear of the column housing cav... | 06/13/2000 |
| 6071074 | Advanced motor driven impeller pump for moving metal in a bath of molten metal An apparatus for moving a stream of molten metal in a bath of molten metal having a pumping member, a pump housing, a power device, a connecting element to connect the power device to drive the pumping member in motion, and a shielding element rotatably m... | 06/06/2000 |
| 6012900 | Submergible pumping system with thermal sprayed polymeric wear surfaces In a pumping system, a PEEK composite material may be applied to wear areas on internal components. Typically, the internal component provides a metallic substrate which is prepared with a metallic bonding layer arc sprayed onto its surface, at least at t... | 01/11/2000 |
| 5961285 | Method and apparatus for removing bottom dross from molten zinc during galvannealing or galvanizing An apparatus for removing bottom dross from molten zinc contained in a coating pot includes a pump, a traversing carriage for positioning the inlet of the pump in a desired horizontal location and a slide mechanism for positioning the inlet of the pump in... | 10/05/1999 |
| 5785494 | Molten metal impeller An impeller for a molten metal pump having a cylindrical body comprised of a refractory material. The cylindrical body includes generally coplanar top and bottom surfaces. A central bore is provided in the top surface to provide a point for mating with a ... | 07/28/1998 |
| 5597289 | Dynamically balanced pump impeller In a non-metallic pump for pumping molten metal including a shaft, a motor at one end of the shaft, an impeller at the other end of the shaft, and a base having a chamber in which the impeller is rotatable, the improvement being a dynamically balanced imp... | 01/28/1997 |
| 5580216 | Magnetic pump A magnetic pump is provided which is especially useful for pumping corrosive agents, having simplified components made of a hard ceramic, preferably silicon carbide, which form ceramic-on-ceramic axial and radial bearing surfaces. The pump has an impeller... | 12/03/1996 |
| 5525035 | Ducted support housing assembly An integral structure comprised of inner and outer coaxial shells mutually supported so as to define an annular passageway between the shells. The integral structure may be an air inlet housing for a gas turbine engine and the inner shell may be a hub mem... | 06/11/1996 |
| 5509783 | Reinforced vane An aerofoil (10) for a turbocharger stator for a large diesel engine has a convex, upper wall (12) and a concave, lower wall (14) with a leading edge (16) and a trailing edge (18). A wiggle strip (22) extends the length of the aerofoil and is brazed to th... | 04/23/1996 |
| 5350275 | Turbomolecular pump having vanes with ceramic and metallic surfaces A turbomolecular pump comprises a casing having an inlet port at one end portion and an outlet port at another end portion, a rotor supported rotatably within the casing, and a stator fixed on an inner wall of the casing. The rotor has rotor vanes which c... | 09/27/1994 |
| 5228284 | High temperature turbine engine structure A high temperature ceramic/metallic turbine engine includes a metallic housing which journals a rotor member of the turbine engine. A ceramic disk-like shroud portion of the engine is supported on the metallic housing portion and maintains a close running... | 07/20/1993 |
| 5080558 | Control stage nozzle vane for use in partial arc operation For steam turbines capable of being operated in partial arc operation, the primary arc of admission is provided with nozzle vanes having a thicker trailing edge as compared to the trailing edges of the remaining nozzle vanes, so that chipping and erosion ... | 01/14/1992 |
| 5030064 | Water turbine and moving blade of water turbine A water turbine used in river water which is comparatively rich in soil and sand particles. In order to improve the resistance to erosion due to cavitation, as well as erosion caused by mechanical action of the soil and sand particles, a water contactable... | 07/09/1991 |
| 5021151 | Plastic impeller pump and filtration unit for semi-conductor etching system A semi-conductor etching system includes a tub for holding a corrosive fluid that is maintained at an elevated temperature and a weir basket which is located in the tub and is also adapted to hold the corrosive fluid. A pump and filtration unit is located... | 06/04/1991 |
| 4960085 | Pneumatic and electro-pneumatic starters Engine pre-engage starters formed of compactly interfit sections featuring a universally applicable high speed turbine rotor, formed preferably of nylon based plastic, the body of which is distinguished by low tensile strength, high impact resistance, rad... | 10/02/1990 |
| 4915589 | Runner with mechanical coupling A runner is provided which consists of a radial turbine ceramic rotor with an integrated ceramic shaft and a non-ceramic compressor impeller which are connected by a releasable, thermally and mechanically loadable mechanical coupling in such a way that th... | 04/10/1990 |
| 4867638 | Split ring seal of a centrifugal pump A split ring seal of a centrifugal pump comprises two rings that consist of a sintered material and that are respectively connected in a frictional or positive manner to a front cover disk of the impeller and to the pump housing which are made of a cast p... | 09/19/1989 |
| 4850803 | Ceramic radial turbine rotor A ceramic radial turbine rotor made of a ceramic material having a strength s (kg/mm2) includes blade tips having a thickness t (mm). A product st2 of strength s and t2 (square of t) is representative of resistance to brea... | 07/25/1989 |
| 4832573 | Integral connection for plastic water pump impeller An integral connection for a plastic water pump impeller includes a molded non circular plug and inwardly facing, radially flexible cylindrical wall in the center of the impeller, and a matching female socket and matching outwardly facing cylindrical wall... | 05/23/1989 |
| 4762465 | Water pump impeller The water pump impeller comprises a boss with a disk part shaped thereon and a circular or paraboloid transition region is provided between the boss and the disk part. A metal reinforcing disk is embedded round on either side by injection moulding in the ... | 08/09/1988 |
| 4678410 | Hair dryer with axial blower A hair dryer with an axial blower is proposed, wherein the design of the blower fanwheel according to the invention increases the efficiency of air delivery so that a considerable reduction in the blower rpm and consequently the noise volume is achieved w... | 07/07/1987 |
| 4639194 | Hybrid gas turbine rotor A hybrid gas turbine rotor having a silicon carbide ceramic turbine wheel portion and a nickel alloy steel shaft portion further includes a hollow silicon carbide ceramic stub shaft integral with the turbine wheel portion having a frustoconical outer surf... | 01/27/1987 |
| 4580943 | Turbine wheel for hot gas turbine engine A turbine wheel for a hot gas turbine engine operable at relatively high peratures, e.g. above 2,000° F., and high velocities, e.g. above 30,000 r.p.m. The blades are formed of temperature-resistant ceramic material. A special annular band of high tensi... | 04/08/1986 |
| 4499158 | Welded structural member having high erosion resistance A welded structural member adapted to be subjected to a flowing fluid and comprising a base member consisting mainly of iron and a coating layer formed by a build-up welding on the surface of the base member, the coating layer having a higher erosion resi... | 02/12/1985 |
| 4428717 | Composite centrifugal impeller for slurry pumps A highly wear-resistant impeller for centrifugal pumps of composite construction comprising a base and a cover plate formed of material which can be worked with relative ease and an insert sandwiched between said base and cover plate formed of high temper... | 01/31/1984 |
| 4411593 | Rotary type pump resistant to muddy water A rotary type liquid pump of the type used with marine outdoor motors is made resistant to abrasive materials in muddy water which it pumps by providing flexible seals to prevent the water from stealing between the impeller boss and bush, and the drive sh... | 10/25/1983 |
| 4406582 | Submersible pump discharge head A discharge head for a submersible pump includes a plastic body having an internally threaded neck for receiving a tapered threaded end of a fluid delivery pipe and a metal shell surrounding and engaging the neck to reinforce the neck against the radial f... | 09/27/1983 |
| 4392779 | Marine drive water pump Marine drives having water cooled engines utilize a water pump mounted over the drive shaft and internal to the drive shaft housing to provide engine cooling, the pump having stamped metal housing parts and a flexible impeller.... | 07/12/1983 |
| 4384452 | Steam-cooled blading with steam thermal barrier for reheat gas turbine combined with steam turbine Steam-cooling with a steam thermal barrier for reheat gas turbine vanes and blades offers advantages over cooling with air or water at the higher temperatures characteristic of existing high temperature gas turbines, in particular when coupled with a rehe... | 05/24/1983 |
| 4369020 | Rotor seal for wave compression turbocharger A wave compression turbocharger has a rotor journalled for rotation about its axis, a first housing, through which air at ambient conditions is admitted to the rotor and from which compressed air is discharged from the rotor. Mounted at one axial end of t... | 01/18/1983 |
