Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7443671 | Axial duct cooling fan A cooling fan comprising a housing that connects to a chassis that is operable to support an electronic component. An axial duct runs through the housing. A blade assembly is rotatably disposed within the duct and comprises a plurality of fan blades that extend radi... | 10/28/2008 |
| 7329964 | Compact hydropower generator adopting multiple rotary drums A compact hydropower generator adopting multiple rotary drums comprises a water reservoir for changing the flow direction of water that flows along a river and for temporarily storing the water. A base body is located at a lower side of the water reservoir and has a... | 02/12/2008 |
| 7090460 | Pump embodied as a side channel pump A side channel pump, preferably a vacuum pump, includes a driven rotor (16) and a fixed stator (14). The rotor (16) and the stator (14) define a pump channel circulating in a peripheral direction. Blades are fixed onto the rotor, protrudi... | 08/15/2006 |
| 7044711 | Helical device for conversion of fluid potential energy to mechanical energy This device utilizes a helical baffle inside of generally cylindrical housing to convert potential energy of a fluid to kinetic and/or mechanical energy that can be captured for productive use. The housing's axis is positioned at an angle from horizontal and the flu... | 05/16/2006 |
| 6962479 | Compound centrifugal and screw compressor A compound centrifugal and screw compressor comprising two separate sections. The first section is a conventional centrifugal compressor body 2 with a plurality of radial vanes 3 and 4 on the front face. The second section of the compressor is a... | 11/08/2005 |
| 6910483 | Double-ended blower and volutes therefor A double-ended variable speed blower for Continuous Positive Airway Pressure (CPAP) ventilation of patients includes two impellers in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the double-ended blower can ... | 06/28/2005 |
| 6881026 | Screw compressors with rotor and casing design for controlling deflections A screw compressor includes a housing and a screw rotor disposed in the housing and rotatable relative to the housing for compressing a refrigerant, the housing and the screw rotor having a rest condition, and an operating condition wherein at least one of the housi... | 04/19/2005 |
| 6837684 | Pump impeller An impeller for a pump used for pumping liquid substances, such as waste water, said impeller containing at least one flow channel of a spatially curved shape, wherein the flow channel is of an evenly curved shape and, in the final portion of the channel, the flow c... | 01/04/2005 |
| 6702553 | Abradable material for clearance control A highly porous alumina material and a method for applying such material that is useful in the hot section of a jet aircraft engine. In order to manufacture the porous alumina, an aluminum-based metal/alumina material known in the art is first placed onto... | 03/09/2004 |
| 6499718 | Fluent material container and dispenser A fluent material containing and dispensing apparatus including a hopper having four sidewalls. A tube mounts to one of the sidewalls, and an auger extends from one end of the tube to the opposite end of the hopper, driving material in the hopper through ... | 12/31/2002 |
| 6474939 | Cell for pumping a multiphase effluent and pump comprising at least one of the cells A cell for pumping a multiphase effluent includes two rotary parts (4-5), the first one (4) having a hydraulic wheel designed for transmitting kinetic energy to each of the multiphase effluent phases entering cell (1a-1b), and the second one (5), followin... | 11/05/2002 |
| 6468029 | Pump device A pump device for pumping a fluid having a housing which includes an inner wall to form a cavity. The device further includes an impeller rotatably mounted in the housing and residing in the cavity, wherein the impeller includes a cylindrical portion and ... | 10/22/2002 |
| 6439834 | Oil field tool The oil field tool motor is particularly suited for use in the oil well shaft environment wherein the temperature within the shaft can climb to nearly 400° F. and wherein the temperature within the motor can drop to nearly -400° F. when liquid nitrogen ... | 08/27/2002 |
| 6357997 | Ribbon drive power generation apparatus and method A ribbon drive power generation system and method is disclosed. The system is equipped with an extended tube having an intake at a first end and an outlet at a second end. A ribbon formed of helical coils is mounted in the tube for rotation and the freque... | 03/19/2002 |
| 6273672 | Two-phase helical mixed flow impeller with curved fairing A compression or expansion two-phase helical mixed flow impeller (1) comprising one or more vanes (3) mounted on a boss, a cover (4) or fairing mounted on the outer part of the vanes, the assembly being arranged in a housing (2). The cover (4) has at leas... | 08/14/2001 |
| 6158959 | Pump impeller A pump impeller of a centrifugal or a half axial type meant to pump liquids, mainly sewage water. The pump impeller has a hub (4) provided with one or several vanes (5) the leading edges (6) of which being strongly swept backwards. The periphery (8) of th... | 12/12/2000 |
| 6132172 | Windmill An improved windmill includes a conical rotor unit, a frame for supporting the conical rotor unit and a base for supporting the frame. The conical rotor unit has a conical rotor with a plurality of spaced curved blades disposed thereon and a plurality of ... | 10/17/2000 |
| 6053700 | Ducted turbine A turbine 400 has a central duct 410 which accelerates fluid passing through it and a blade configuration which retards the flow of fluid near the tips of the turbine. This structure results in a vortex having a higher fluid pressure behind the tips of th... | 04/25/2000 |
| 6036443 | Helical turbine assembly operable under multidirectional gas and water flow for power and propulsion systems A helical turbine assembly capable of providing high speed unidirectional rotation under a multidirectional ultra low-head fluid flow is disclosed. The assembly comprises an array of helical turbine units or modules arranged, vertically or horizontally, t... | 03/14/2000 |
| 5997242 | Hydraulic turbine An hydraulic turbine includes a rotatable turbine runner. The turbine runner has a circumferential inlet for receiving a fluid and an axial outlet for discharging the fluid. The turbine runner also includes a conical-shaped hub rotatable about a central a... | 12/07/1999 |
| 5878808 | Rotating heat exchanger A rotating heat exchanger (10) has a first air turbine (16) connected to a first end of an axle (20). The second end of the axle (20) is connected to a second air turbine (18). A heat pipe (30, 40, 42, 44) extends from the first air turbine (16) to the se... | 03/09/1999 |
| 5694771 | Drive mechanism The variable speed drive mechanism includes an input member (17) and an output member (18), each rotatable within a housing (11) filled with fluid. The input and output members each have helical vanes (26) that are in a close running fit with sleeves (21,... | 12/09/1997 |
| 5527159 | Rotary blood pump A rotary blood pump includes a pump housing for receiving a flow straightener, a rotor mounted on rotor bearings and having an inducer portion and an impeller portion, and a diffuser. The entrance angle, outlet angle, axial and radial clearances of blades... | 06/18/1996 |
| 5501574 | Blood pump A dynamic blood pump includes a rotating core member and rotating ring portion effective to pre-spin blood before the blood enteres helical pumping channels of the pump. The blood is pumped and further rotated as it moves axially along the helical channel... | 03/26/1996 |
| 5451137 | Unidirectional helical reaction turbine operable under reversible fluid flow for power systems A reaction turbine capable of providing high speed unidirectional rotation under a reversible ultra low head pressure and/or high velocity fluid flow is disclosed. The turbine comprises a working wheel with a plurality of airfoil-shaped blades mounted tra... | 09/19/1995 |
| 5382092 | Mixing apparatus and bottom ribbon blade used therein A mixing apparatus includes a bottom ribbon blade adapted for viscous fluid contents. The mixing apparatus includes a vertically positioned mixing vessel including a cylindrical wall and a bottom wall disposed on a lower portion of the cylindrical wall wh... | 01/17/1995 |
| 5368438 | Blood pump A dynamic blood pump includes a rotating core member and rotating ring portion effective to pre-spin blood before the blood enteres helical pumping channels of the pump. The blood is pumped and further rotated as it moves axially along the helical channel... | 11/29/1994 |
| 5344281 | Rotary vortex machine A rotary vortex machine having a stator (1) with an internal annular space (4) accommodating vanes (9) and a rotor (6) with an external annular space (7) accommodating a bridge (10) dividing the external annular space (7) into suction and delivery volumes... | 09/06/1994 |
| 5312224 | Conical logarithmic spiral viscosity pump A rotary viscosity pump is provided that has a housing and an impeller. The housing has a conical chamber with an outlet at a narrow end of the chamber. The impeller has a conical section with a logarithmic spiral groove along its exterior. The spacing be... | 05/17/1994 |
| 5290145 | Multiple stage drag and dynamic pump A multiple stage drag and dynamic pump is provided for pumping fluid. The pump comprises a housing and a shaft positioned in the housing, the shaft rotating about the longitudinal axis of the housing. A rotor assembly has a plurality of pump stages mounte... | 03/01/1994 |
| 5281086 | Pump for viscous fluids The invention is directed to a pump for pumping a viscous fluid. The pump includes a stator body and a rotor body rotatably mounted in the stator body so as to be coaxial therewith. The stator body has a wall structure having a spiral slot formed therein ... | 01/25/1994 |
| 5261783 | Kinetic pump having a centerless impeller The invention is a kinetic pump having a centerless impeller. The pump comprises a pump body rotated by a powered means either having a rotatable shaft or driving a peripheral belt drive. The pump body has a recess formed therein as well as at least one s... | 11/16/1993 |
| 5181868 | Jet propulsion device for watercraft, aircraft, and circulating pumps A jet propulsion drive element is disclosed for the increasing of the power yield of jet engines, in particular for watercraft, employing a rotary-driven jet propulsion pipe (11). A thrust propulsion element is disposed at the inner jacket of the jet prop... | 01/26/1993 |
| 5167483 | Method for utilizing angular momentum in energy conversion devices and an apparatus therefore An energy conversion device which benefits from forces associated with angular momentum. A mass such as fluid is directed through a conduit from one elevation to a lower elevation with the conduit configured to conform to a decreasing cross-sectional area... | 12/01/1992 |
| 5139391 | Rotary machine with non-positive displacement usable as a pump, compressor, propulsor, generator or drive turbine A rotary machine, having non-positive, displacement, which can be used as a pump, compressor, generator or drive turbine wherein the rotor is form by a particular combination of paddles and blades which improves fluid flow through the rotary machine. The ... | 08/18/1992 |
| 5112188 | Multiple stage drag and dynamic turbine downhole motor A multistage turbine is provided for driving a downhole motor, which is driven by the flow of a fluid therethrough. The turbine comprises a housing and a shaft positioned in the housing, the shaft rotating about the longitudinal axis thereof. A plurality ... | 05/12/1992 |
| 5102294 | Screw pump A screw pump for feeding highly viscous material such as mixed concrete and the like. Plural projections engage the helical screw of the screw pumps to facilitating removal of the material such as gravel caught in the screw pump. Further for preventing ex... | 04/07/1992 |
| 5098258 | Multiple stage drag turbine downhole motor A multistage drag turbine assembly is provided for use in a downhole motor, the drag turbine assembly comprising an outer sleeve and a central shaft positioned within the outer sleeve, the central shaft having a hollow center and a divider means extending... | 03/24/1992 |
| 5000658 | Apparatus for pumping high consistency fiber suspension An apparatus for treating high-consistency fiber suspension is especially suitable for short distance conveyances of thick fiber suspensions (consistency more than 15%) in pulp and paper industry, for example for discharge of mass towers either with or wi... | 03/19/1991 |
| 4813849 | Fluid pump with air inducer A screw-type fluid pump is provided with an elongate casing having a surface defining an internal fluid flow space and a screw within the flow path, fixed to the casing, and having a plurality of flights for continuously conveying fluid from an inlet on t... | 03/21/1989 |
