Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 8033792 | High flow/high efficiency centrifugal pump having a turbine impeller for liquid applications including molten metal A centrifugal pump having a turbine impeller having a plurality of curved vanes. The vanes curve from the inlet end to the outlet end in the direction of pumping rotation of the impeller, such that the leading wall of each vane re-directs a portion of the radial vel... | 10/11/2011 |
| 7896617 | High flow/high efficiency centrifugal pump having a turbine impeller for liquid applications including molten metal A centrifugal pump having a turbine impeller having a plurality of curved vanes. The vanes curve from the inlet end to the outlet end in the direction of pumping rotation of the impeller, such that the leading wall of each vane re-directs a portion of the radial vel... | 03/01/2011 |
| 7771170 | Turbine wheel The hub/blade junction of each rotor blade is placed with respect to the scalloping surface (F1+F2) such that this surface is supported as symmetrically as possible by the rotor blade. The turbine wheel with three-dimensionally curved rotor bla... | 08/10/2010 |
| 7329100 | Centrifugal fan impeller An impeller of a centrifugal fan, the impeller used in the centrifugal fan having a casing and the impeller rotatably mounted in the casing. The impeller includes a hub connecting a number of blades equiangularly disposed in a circumferential direction. The hub incl... | 02/12/2008 |
| 7264443 | Centrifugal water pump A pump includes a housing defining an internal chamber having an axial inlet passage, a generally radial passage with an outlet to a volute. A rotatable impeller, disposed within the chamber, has a conical rear shroud sloping away from the axial inlet to define a re... | 09/04/2007 |
| 7195450 | Multiblade fan and electronic apparatus having a multiblade fan A multiblade fan includes a case having an air intake port and an air exhaust port, an impeller disposed in said case and having a plurality of blades rotatable about the center of said air intake port, and a noise silencer fin extending substantially parallel to th... | 03/27/2007 |
| 7168918 | High performance cooling fan A cooling fan comprises a rotor configured to generate airflow. The cooling fan further comprises an outlet guide vane adapted to receive the airflow generated by the rotor and to orient the airflow in a substantially axial direction relative to the rotor. The cooli... | 01/30/2007 |
| 7165938 | Fan device for removing heat from heat sources A fan device includes a casing having a recess defined in a first side thereof so as to receive a fan unit therein, and a hole defined through a second side of the casing. An outlet is defined in a side of the casing. The fan unit includes a first ring and a motor i... | 01/23/2007 |
| 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 |
| 7118345 | Fan blade An impeller is applied to a centrifugal fan and includes fan blades and a hub. Each fan blade includes a first portion and a second portion. The first portion is located relatively close to the hub and the first portion is coupled to the second portion. The first po... | 10/10/2006 |
| 6921242 | Centrifugal slurry pump An apparatus and method for a slurry pump having improved erosion characteristics. The pump comprises a rotatable impeller having at least one impeller vane, an impeller shroud having an inlet for conveying slurry to the impeller and an outlet for discharging slurry... | 07/26/2005 |
| 6918741 | Molten metal pump impeller system An impeller system for use in a molten metal pump, the impeller system including a generally cylindrical outer wall with outlets therein, an impeller lid mounted on the impeller walls, the impeller lid including a plurality of inlets, with the shaft being mounted di... | 07/19/2005 |
| 6908282 | Air fan An air fan mainly includes a frame and a blade portion. The blade portion is formed from a hub and a plurality of blades spaced around the hub; and the frame includes a plurality of locating members, and a driving section fixedly supported at inner ends of the locat... | 06/21/2005 |
| 6902377 | High performance axial fan A fan impeller is part of a fan assembly designed to maximize both intake and expelled air during use. The fan impeller employs a distinct airfoil shape for the fan blades to substantially move the ambient air. A low constant blade angle and overlapping blades are e... | 06/07/2005 |
| 6802693 | Vortex attractor with vanes attached to containing ring and backplate A vortex generating apparatus has the capability of attracting and removably adhering one or more solid objects. The apparatus comprises an impeller housed within a shell. The vortex attractor generates a vortical fluid flow generally in the form of a helical or spi... | 10/12/2004 |
| 6790007 | Wind turbine structure A vertical axis wind turbine including a wind turbine which depends on a vortex down wind of the turbine enhancing the air flow past the vertical turbine. The vertical axis wind turbine structure includes a rectangular shaped turbine with four orbiting panels mounte... | 09/14/2004 |
| 6699013 | Forced air cooling fan having pivotal fan blades for unidirectional air flow The forced air cooling fan comprises a flat disk surface having a series of circumferentially spaced apertures each including a V-shaped fan blade connected across the aperture perpendicular to the periphery of the disk-shaped surface. The V-shaped fan bl... | 03/02/2004 |
| 6595753 | Vortex attractor A vortex generating apparatus has the capability of attracting and removably adhering one or more solid objects. The apparatus comprises an impeller housed within a shell. The vortex attractor generates a vortical fluid flow generally in the form of a hel... | 07/22/2003 |
| 6579064 | Blade for a cooling fan A blade for a cooling fan is formed on an outer periphery of a rotor of the cooling fan and is curved. The blade has a convex outer surface and a concave inner surface. A curved angle of the blade between a line through the center of the rotor and a root ... | 06/17/2003 |
| 6464458 | 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 ... | 10/15/2002 |
| 6254340 | 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 ... | 07/03/2001 |
| 6238185 | Fan with low noise, high air flow and high wind pressure This invention relates to a fan. According to the rotational direction, the outermost point of the front side of the fan is leading to the innermost point of the front side such that the portion first contacting air is minimized and the noise of the fan i... | 05/29/2001 |
| 6206641 | Micro fan Disclosed is a micro fan. The micro fan comprises a hub rotatably mounted to a shaft, and a plurality of blades radially formed on a circumferential outer surface of the hub, wherein each blade has an airfoil-shaped cross-section which generates lift forc... | 03/27/2001 |
| 6135710 | Turbo blood pump A blood pump used for extra corporeal circulation, and more particularly, as a small turbo blood pump including a casing having an interior region, an aperture formed in an upper portion defining a blood inlet, and an aperture formed in a lower portion de... | 10/24/2000 |
| 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 |
| 5685695 | Fan wheel and method for manufacturing the same A fan wheel for high-temperature operation, especially in ovens, includes a star-like or ray-like base plate having a central middle region, protrusions protruding substantially radially beyond the central middle region and having an outer contour, axiall... | 11/11/1997 |
| 5605439 | Drainage pump A drainage pump 1 comprises a pump housing 40 defining a suction inlet 42, a pumping chamber 44 and a delivery outlet 46, and a cover 32. An impeller 50 accommodated in the pump housing is driven by a motor 10. The impeller 50 comprises a shaft 52 coupled... | 02/25/1997 |
| 5413464 | Propulsion device having circular array of inclined airfoil elements with radially-inwardly directed vacuum-inducing surfaces A propulsion device comprises a circular series of inclined airfoil elements. Each airfoil element is connected along its lower side to a rigid plate member, which is adapted to be rotated at high speed via a motor output shaft. The airfoil elements are o... | 05/09/1995 |
| 5413465 | Propulsion device having circular array of inclined airfoil elements with radially-outwardly directed vacuum-inducing surfaces A propulsion device comprises a circular series of inclined airfoil elements. Each airfoil element is connected along its upper side to a rigid plate member, which is adapted to be rotated at high speed via a motor output shaft. The airfoil elements are o... | 05/09/1995 |
| 5328333 | Rotating thrust-producing apparatus A circular foil connectable to a source of power for producing thrust in an axial direction when rotated, includes a flat circular plate and a plurality of closely spaced-apart fins fixed to an upper face of the circular plate, which occupy substantially ... | 07/12/1994 |
| 5143513 | Dishwasher pump The present invention is directed to a two chamber dishwasher pump wherein the pumping noise associated with recirculation is substantially lowered by reducing the intake area to the recirculation impeller thereby interrupting air pockets formed in the fl... | 09/01/1992 |
| 5124038 | Apparatus for separating and recovering floating liquid An apparatus for separating and recovering floating liquid wherein one or more vortex guide plates are horizontally held on the surface of the water inhibiting their rotation, the lower members of the guide plates are submerged under the surface of the wa... | 06/23/1992 |
| 5104541 | Oil-water separator A pump has an impeller with a circular series of airfoil vanes rigidly mounted thereon. The impeller is mounted in a casing which has a radially outwardly increasing internal axial extent, such that fluid flowing through the pump has a less constricted pa... | 04/14/1992 |
| 5044887 | Blower fan impellers A fan impeller comprises a back plate, a front plate and a plurality of blades lying between the front and back plates, wherein the blades are fitted relative to the axis of rotation of the impeller to provide a leading edge adjacent the back plate, so as... | 09/03/1991 |
| 4986736 | Pump impeller A pump impeller manufactured by press forming of steel plate and comprising a boss formed with a central bore for connecting the boss to a main shaft of the pump through key and key way engagement, and a main shroud fixed to the boss is disclosed. The imp... | 01/22/1991 |
| 4958987 | Materials handling fan impeller An impeller for a materials handling fan can be made in several different diameters utilizing a single central hub of fixed diameter. The single central hub is designed to withstand the varying stresses imposed by different impeller diameters. A circular ... | 09/25/1990 |
| 4670677 | Electric motor with shrouded fan An electric motor has stator coils extending longitudinally past an end of its rotor so that the end turns and at least a portion of the inner side of the stator coils are exposed. A fan is disposed inside the motor shell between a first air passageway an... | 06/02/1987 |
| 4551285 | Flotation machine and aeration impeller A froth flotation machine (40) having a rotary air-supply shaft (42) vertically disposed in a vessel (41) includes an impeller (50) comprising a series of interconnected blades (52,53). Extending radially and fixedly depending from a flat impeller plate (... | 11/05/1985 |
| 4521154 | Centrifugal fans A circulating fan for annealing furnaces of the type having a centrally apertured circular base plate, a plurality of circumferentially spaced radially disposed main fan blades, mounted on one side of said base plate having a forwardly inclined concave sc... | 06/04/1985 |
| 4484860 | Radial tube centrifugal fan A radial tube centrifugal fan is disclosed. The fan is assembled from a first mating half (12) having a planar backing plate (16) with a group of half tubes (52) extending in spoke-like fashion from the plate and separated by webbing members (56), attache... | 11/27/1984 |
