Serially Arranged In Working Fluid Path Patents (Class 415/100)
  • Patent number: 10746189
    Abstract: A multi-stage pump featuring different stages configured to pump a fluid from a pump suction and to a pump discharge; and a center bushing configured between the different stages, having a center bushing side configured with pockets to balance axial forces between the different stages of the multistage pump. The pockets are configured as curved rib pockets, extruded circle or circular pockets, or full length rib pockets.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: August 18, 2020
    Assignee: Fluid Handling LLC
    Inventors: Paul J. Ruzicka, Christopher J. Felix, Marcos D. Roimicher
  • Patent number: 10683872
    Abstract: A centrifugal compressor bundle that is provided with a bundle main body in which is formed an annular intake flow channel (FC1) that is centered on an axis line (O) and that leads a process gas (G) into a flow channel (FC) of an impeller, and in which is also formed an annular discharge flow channel (FC2) that is centered on the axis line (O) and that discharges the process gas (G) from the flow channel (FC) of the impeller. The bundle main body has a plurality of diaphragms that are aligned in the direction of the axis line (O) and that are bonded to each other. From among the plurality of diaphragms, an intake diaphragm in which the intake flow channel (FC1) is formed is partitioned so as to have an upper-half part and a lower-half part that sandwich, from above and below, a horizontal plane that includes the axis line (O). The upper-half part and the lower-half part have the same rigidity in the direction of the axis line (O).
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: June 16, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventor: Hideki Yamada
  • Patent number: 10655627
    Abstract: A multi-section centrifugal compressor includes at least a first and a second section; each section has an inlet duct and a discharge duct, the discharge duct of the first section is placed in fluid communication with the inlet duct of the second section, the second section is configured to compress a fluid compressed by the first section; the discharge duct of the second section is adjacent to the inlet duct of the first section.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: May 19, 2020
    Assignee: NUOVO PIGNONE SRL
    Inventor: Franco Sarri
  • Patent number: 10465929
    Abstract: A supply air apparatus for producing outdoor air into an indoor space assisted by an auxiliary powered blower by simultaneously mixing the outdoor air with air from the indoor space. In connection with an outdoor air flow way in a structure in a building between the indoor space and outside air, a flow space and flow connections for outdoor and indoor air for mixing with each other, the blower and a blow flow arrangement for leading a mixed flow of air into the indoor space in the building. In connection with a supply air device in an outer wall of the building, an air distribution device including: a frame; a flow space in the frame; an inflow outdoor and indoor air that joins with the flow space and opens into an internal space in the building; the blower; and a blow flow leading the mixed air into the indoor space.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: November 5, 2019
    Assignee: FINLUFT OY
    Inventor: Kyösti Havia
  • Patent number: 10428807
    Abstract: Methods and apparatus for reducing the power consumption of a pump are provided herein. In some embodiments, a pump power consumption reduction system for use in a substrate processing system may include a vacuum chamber having an exhaust port; a valve; a first pump having a pump inlet port coupled to the exhaust port via the valve and a pump exhaust port to couple the first pump to an exhaust handling system; and a second pump coupled to the pump exhaust port to selectively reduce an exhaust pressure of the first pump.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: October 1, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Mariusch Gregor, Kenneth Le
  • Patent number: 10364820
    Abstract: A compressor includes a casing having an upper half casing and a lower half casing and a tubular shape with both ends open, a bundle including annular heads respectively fixed on both sides in an axial direction with respect to a plurality of diaphragms and closing openings of the casing, a communication clearance seal portion sealing a communication clearance extending in the axial direction between the outer peripheral surface of the diaphragm and the inner peripheral surface of the casing such that a suction opening and a discharge opening communicate with each other, and a regulating portion regulating the position of the head in the axial direction with respect to the casing.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: July 30, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    Inventors: Takashi Oda, Hitoshi Shinohara
  • Patent number: 10337517
    Abstract: An improved vacuum pump mechanism is described in which an intersecting solid or perforated element is arranged to intersect a channel member. Relative movement of the intersecting solid or perforated element and channel member causes gas molecules to be urged from inlet to an outlet of the pump. Gas molecules are constrained within the channel member and interaction of the gas molecules with the flat and smooth surfaces of the intersecting solid or perforated member influence momentum of the gas molecules so that they are directed towards the outlet. In one embodiment, the channel member is formed as a helix and the intersecting solid or perforated elements are disk-shaped. An alternative embodiment is provided having the channel member configured as a spiral and the perforated elements as cylindrical skirts. The pump provides significant improvements in pump capacity, reduced power consumption and size of pump.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: July 2, 2019
    Assignee: Edwards Limited
    Inventors: Nigel Paul Schofield, Ian David Stones, Stephen Dowdeswell
  • Patent number: 10267337
    Abstract: A vacuum pump comprises a cylindrical rotor; a cylindrical stator which discharges gas in cooperation with the rotor; and a tubular base to which the stator is fixed. The stator has no fitting structure with respect to the base and is fixed to the base in a concentric state. A pin hole is formed on the stator and the base respectively, and a positioning pin for achieving the concentric state is inserted into each pin hole.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: April 23, 2019
    Assignee: SHIMADZU CORPORATION
    Inventor: Tetsuya Tsubokawa
  • Patent number: 10260502
    Abstract: The present invention relates to a pumping method in a pumping system (SP) comprising: a primary dry screw-type vacuum pump (3) with a gas entry orifice (2) connected to a vacuum chamber (1) and a gas exit orifice (4) leading into a conduit (5) before coming out into the gas outlet (8) of the pumping system (SP), a non-return valve (6) positioned in the conduit (5) between the gas exit orifice (4) and the gas outlet (8), and an ejector (7) connected in parallel to the non-return valve (6).
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: April 16, 2019
    Assignee: Ateliers Busch SA
    Inventors: Didier Müller, Jean-Eric Larcher, Théodore Iltchev
  • Patent number: 9938983
    Abstract: A compressor for a motor-compressor set, comprising, on a rotating shaft, a balancing piston, a set of bladed wheels, a rear cavity of the piston adjacent to the balancing piston on a side opposite to the set of bladed wheels, a regulation valve suitable for coupling the rear cavity to the input of the set of bladed wheels, a suction pressure chamber coupled to the input of the set of bladed wheels, the rear cavity being arranged between the balancing piston and the suction pressure chamber. The compressor comprises a discharge pressure chamber arranged between the rear cavity of the piston and the suction pressure chamber, the discharge pressure chamber being coupled via a discharge line to a discharge area between the set of bladed wheels and the balancing piston.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: April 10, 2018
    Assignee: Thermodyn SAS
    Inventors: Benjamin Stalder, Thomas Alban
  • Patent number: 9863427
    Abstract: A barrel-type multistage pump with uniformed velocity distribution in an axial direction, on a cross-section of a rotating flow channel, to suppress fluid loss in a last stage, and including: plural stages of centrifugal impellers, covered by an inner casing; diffusers and return channels provided on downstream sides of the centrifugal impellers, to guide the flow of a fluid to a centrifugal impeller in the next stage, and return vanes arranged at respective return channels; a cylindrical outer casing having a suction pipe and a discharge pipe, wherein a cylindrical rotating flow channel connected to a discharge opening is provided between an outer casing and an inner casing, a connecting channel to connect between a rotating flow channel and diffusers.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: January 9, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Takahide Nagahara, Daichi Torii, Tetsuya Yoshida
  • Patent number: 9803644
    Abstract: A back-to-back centrifugal pump comprising a pump inlet, a pump outlet, a pump shaft, a set of first stages, and a set of second stages in a back-to-back arrangement. Between the two sets of stages an intermediate crossover module is arranged. The first and second sets of stages comprise respective first outer diaphragms and second outer diaphragms. The outer diaphragms and the intermediate crossover module are stacked together and form a pump casing. The intermediate crossover module forms at least one axial transfer channel between the two sets of stages, and a fluid connection between the set of second stages and the pump outlet. The second diaphragms comprise each at least one peripherally arranged through aperture. The through apertures are aligned to form at least one passageway, which fluidly connects the axial transfer channel with a most upstream one of the impellers of the second set of stages.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: October 31, 2017
    Assignee: Nuovo Pignone SRL
    Inventors: Lorenzo Bergamini, Donato Antonio Ripa, Fabrizio Milone
  • Patent number: 9637211
    Abstract: A marine propulsion system includes a housing configured to be coupled to, or within, a marine vessel hull. At least one pair of counter-rotating impellers is disposed within the housing such that the rotation occurs in a plane generally parallel to the surface of the water. A moveable output nozzle is coupled to the rear portion of the housing and can move to facilitate controlling the direction of travel of the vessel.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: May 2, 2017
    Assignee: Palmetto Propulsion, LLC
    Inventor: David R. Brower
  • Patent number: 8932003
    Abstract: Disclosed is a vacuum self-priming pump in which a main pumping chamber and a sub-pumping chamber divided from each other by a diaphragm are provided within a case, main impellers and a sub-impeller rotated by a motor are respectively installed within the main pump chamber and the sub-pumping chamber such that a space is formed between a pair of left and right main impellers, and connection pipes are respectively formed between suction pipes of the main pumping chamber and the sub-pumping chamber and between discharge pipes of the main pumping chamber and the sub-pumping chamber, so as to more rapidly suck fluid every pumping operation and to effectively pump the fluid without clogging even if the pumped fluid contains various sludge or solid matter.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: January 13, 2015
    Inventor: Chan Won Kim
  • Patent number: 8858154
    Abstract: A pump system (1) is provided for the pumping of multiphase mixtures which includes a pumping apparatus (3) for multiphase mixtures with at least one liquid phase and at least one gaseous phase. The pumping apparatus (3) contains one or more axial compression stages with one respective axial impeller each and one or more pumping stages with a respective one radial impeller each which are arranged adjoining the axial compression stage or stages, wherein the pump system (1) additionally includes a separator (2) at the inlet side of the pumping apparatus (3) to separate a portion of the gaseous phase and wherein the pumping apparatus (3) is configured for delivery heads larger than 50 m.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: October 14, 2014
    Assignee: Sulzer Pumpen AG
    Inventor: Johann Guelich
  • Patent number: 8800310
    Abstract: A turbo compressor to suction and compress gas includes a housing including a flow passageway through which gas flows, an impeller disposed inside the flow passageway, the impeller providing suction for the gas by being rotationally driven, a liquid discharge port provided in the flow passageway on the upstream side of the impeller, the liquid discharge port discharging, from the flow passageway, any liquid produced as the gas liquefies when the turbo compressor is stopped, a liquid discharge pipe connected to the liquid discharge port, an electromagnetic valve connected to the liquid discharge pipe, and a controller configured to open the electromagnetic valve before the impeller is rotationally driven. A refrigerator includes the turbo compressor, wherein the turbo compressor compresses refrigerant gas.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: August 12, 2014
    Assignee: IHI Corporation
    Inventor: Noriyasu Sugitani
  • Patent number: 8601832
    Abstract: A turbo compressor has a plurality of stages of compression means, each including an impeller and a diffuser, arranged in tandem with the flow of a fluid, and is capable of compressing the fluid sequentially in a plurality of the compression means and supplying the fluid compressed in the compression means in a final stage to a condenser. The diffuser of at least the compression means in the final stage is a vaneless diffuser which does not include diffuser vanes which reduce the turning speed of the fluid in the diffuser. As such, according to this turbo compressor, it is possible to reduce generation of noise resulting from the transmission of turbulence of the fluid to the condenser, which occurs as the refrigerant collides against the diffuser vane.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: December 10, 2013
    Assignee: IHI Corporation
    Inventor: Minoru Tsukamoto
  • Patent number: 8517012
    Abstract: A multiple stage 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 multiple stage blower can provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: August 27, 2013
    Assignee: ResMed Limited
    Inventors: Geoffrey Daniel Daly, Alexander Virr, Stephen Anthony Lea, Dion Charles Chewe Martin, Nicholas Jerome Reed, Larry Puckeridge, Timothy Tsun-Fai Fu
  • Publication number: 20130183137
    Abstract: A fluid pump includes a primary impeller and a secondary impeller disposed on a common drive shaft within a pump housing. The pump housing including a respective diffuser or volute therein for each of the primary impeller and the secondary impeller. A fluid passage is formed within the housing connecting a discharge of the primary impeller to an intake of the secondary impeller. Each of the primary and secondary impellers has a respective outlet port.
    Type: Application
    Filed: December 21, 2012
    Publication date: July 18, 2013
    Inventor: William E. Murray
  • Patent number: 8476929
    Abstract: In the case where data is rewritten in a delay period of a signal in a flip flop and a shift register which use an inverted clock signal, current inhibiting charging may flow, whereby data cannot written quickly, so that charging is not completed, which makes operation unstable. In view of the above, a flip flop and a shift register without using an inverted clock signal, which have high stability are provided. Current inhibiting charging of a node where that current inhibiting charging flows is cut off at the time of rewriting data so that data is rewritten quickly.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: July 2, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hajime Kimura
  • Patent number: 8376687
    Abstract: A steam turbine includes a rotor having a plurality of early stages and a stator portion surrounding a portion of the rotor and arranged such that a leakage region exists between the stator portion and the rotor and having a cooling steam channel that passes cooling steam from one portion of the stator portion to the leakage region. The turbine also includes at least one cooling steam transmission channel axially displaced about the rotor that receives the cooling steam from the leakage region and provides it to at least a portion of the early stages.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: February 19, 2013
    Assignee: General Electric Company
    Inventors: Ravi Shankar Venkata Kasibhotla, Anantha Padmanabhan Bhagavatheeswaran, Fred Thomas Willett, Jr.
  • Patent number: 8348608
    Abstract: A rotor of a turbomachine includes a rotor drum located at a central axis and a plurality of buckets secured to the rotor drum. A rotor shell extends between axially adjacent buckets of the plurality of buckets and is secured to and supported by the plurality of buckets defining a cooling passage between the rotor drum and the rotor shell. A low pressure sink is located at an upstream end of the rotor receptive of a coolant flow through the cooling passage. A method of cooling a rotor of a steam turbine includes locating a rotor shell radially outboard of a rotor drum defining a cooling passage therebetween. A flow of steam is urged from a downstream portion of the steam turbine through the cooling passage toward a low pressure sink located at an upstream end of the steam turbine thereby cooling the rotor.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: January 8, 2013
    Assignee: General Electric Company
    Inventors: Fred Thomas Willett, Howard Michael Brilliant, Pepe Palafox
  • Patent number: 8308425
    Abstract: The present invention discloses an adhesion rotary disc pump comprising a housing embedding therein at least one adhesion-propelling disc mounted on a rotatable shaft that is drivable by a drive, wherein fluids engaging with said at least one adhesion-propelling disc are transportable from at least one inlet to at least one outlet. In embodiments, the pump employs a scraping unit operative to scrape off fluid adherent on both sides of each of the at least one rotatable adhesion-propelling disc and that the scraped-off fluid is being channeled directly or indirectly to the at least one outlet.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: November 13, 2012
    Assignee: CSEM Centre Suisse d'Electronique et de Microtechnique SA
    Inventor: Noa Schmid
  • Patent number: 8297914
    Abstract: A fan includes a fan frame, a front impeller and a rear impeller. The fan frame has a frame body and a plurality of connecting elements. The front impeller has a first bushing disposed at the central portion of the frame body. Two ends of each connecting element are respectively connected with the frame body and the first bushing. The rear impeller has a second bushing partially telescoped into the first bushing.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: October 30, 2012
    Assignee: Delta Electronics, Inc.
    Inventors: Shun-Chen Chang, Yi-Ching Chiu
  • Patent number: 8231342
    Abstract: A multi-impeller arrangement and to a pump having the impeller arrangement. The impeller arrangement or impeller cluster includes at least two impellers, each impeller having an annular back plate and an annular front plate. The impellers are releasably secured together in an axially in-line series having the front plate of a first impeller at one end and the back plate of a second impeller at the other end. The second impeller includes an axial projection which extends from its back plate, through and beyond its front plate to the first impeller. The first impeller is engaged with the projection of the second impeller such that all impellers are rotatable as an assembly.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: July 31, 2012
    Assignee: Davey Products Pty Ltd.
    Inventors: Christopher George Lacey, Mark Andrew Lance
  • Publication number: 20120171014
    Abstract: A barrel-type multistage pump with uniformed velocity distribution in an axial direction, on a cross-section of a rotating flow channel, to suppress fluid loss in a last stage, and including: plural stages of centrifugal impellers, covered by an inner casing; diffusers and return channels provided on downstream sides of said centrifugal impellers, to guide the flow of a fluid to a centrifugal impeller in the next stage, and return vanes arranged at respective return channels; a cylindrical outer casing having a suction pipe and a discharge pipe, wherein a cylindrical rotating flow channel connected to a discharge opening is provided between an outer casing and an inner casing, a connecting channel to connect between a rotating flow channel and diffusers.
    Type: Application
    Filed: January 4, 2012
    Publication date: July 5, 2012
    Inventors: Takahide Nagahara, Daichi Torii, Tetsuya Yoshida
  • Patent number: 8202037
    Abstract: Disclosed is a steam turbine comprising an exterior housing and an interior housing. The exterior housing and the interior housing are provided with a fresh steam supply duct. A rotor that encompasses several impeller blades and a thrust-compensating piston is rotably mounted within the interior housing. The interior housing is equipped with several guide blades that are disposed such that a flow duct comprising several blade stages, each of which comprises a series of impeller blades and a series of guide blades, is formed along a specific direction of flow. The interior housing is further equipped with a recirculation duct which is embodied as a pipe that communicates between a space located between the interior housing and the exterior housing and the flow duct downstream of a blade stage.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: June 19, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Frank Deidewig, Yevgen Kostenko, Oliver Myschi, Michael Wechsung, Uwe Zander
  • Patent number: 8122884
    Abstract: 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 provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: February 28, 2012
    Assignee: ResMed Limited
    Inventors: Geoffrey Daniel Daly, Alexander Virr, Stephen Anthony Lea, Dion Charles Chewe Martin, Nicholas Jerome Reed, Larry Puckeridge, Timothy Tsun-Fai Fu
  • Patent number: 7942628
    Abstract: A first compression stage and a second compression stage being arranged at positions adjacent to each other. The first centrifugal impeller and the second centrifugal impeller are arranged in such an orientation that back sides of the first centrifugal impeller and the second centrifugal impeller face to each other. A connection flow path is formed in the first housing and the second housing for introducing the compressed fluid from the first compression stage into the second compression stage. An upstream portion of the connection flow path is formed integrally with the first housing, and a downstream portion of the connection flow path is formed integrally with the second housing.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: May 17, 2011
    Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Toshio Takahashi, Yutaka Hirata, Kazuaki Kurihara, Nobusada Takahara
  • Publication number: 20110058928
    Abstract: A centrifugal pump has alternating impellers and diffusers. One or more vent holes extend through one or more vanes of one or more diffusers. In an upthrust condition, high pressure production fluid from an upper impeller is able to pass through the one or more vent holes, and thereby exert force on the preceding impeller. The force exerted on the preceding impeller offsets the upthrust force acting against the preceding impeller.
    Type: Application
    Filed: September 9, 2010
    Publication date: March 10, 2011
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Ketankumar K. Sheth, Brown Lyle Wilson
  • Patent number: 7762763
    Abstract: A vacuum pump (100) comprises a first set (106) of turbo-molecular stages, a molecular drag stage (112), a first inlet (120) through which fluid can pass through the first set (106) of stages and the molecular drag stage (112) towards a pump outlet (116), second and third sets (108, 110) of turbo-molecular stages located between the first set (106) and the molecular drag stage (112), a second inlet (122), the second and third sets (108, 110) being arranged such that fluid entering the pump through the second inlet (122) is separated into two streams each flowing through a respective one of the second and third sets (108, 110), and conduit means (126) for conveying fluid passing through the first set (106) and one of the second and third sets (108, 110) towards the outlet (116).
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: July 27, 2010
    Assignee: Edwards Limited
    Inventor: Ian David Stones
  • Patent number: 7690887
    Abstract: A first centrifugal impeller and a second centrifugal impeller are arranged in such an orientation that back sides of the first centrifugal impeller and the second centrifugal impeller face to each other. Bearings are cylindrical roller bearings and a thrust bearing. The cylindrical roller bearings are arranged at two axially spaced supporting positions respectively, and support a radial load applied to the rotating shaft. The thrust bearing supports a thrust load applied to the rotating shaft.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: April 6, 2010
    Assignee: Ishikawajima-Harima Heavy Industries, Co., Ltd.
    Inventors: Toshio Takahashi, Yutaka Hirata, Kazuo Kobayashi, Kazuaki Kurihara, Kentaro Oda
  • Patent number: 7600961
    Abstract: Fluid transfer controllers (FTCs) having a rotor assembly with multiple rotor blade sets coupled to a hub component of the rotor assembly and further having barrier components forming passages for routing fluid through the multiple rotor blade sets are provided. More specifically, the FTCs include passages for routing fluid along one side of a dividing structure to which a first set of rotor blades is attached and subsequently along the opposite side of the dividing structure to which a second set of rotor blades is attached. The dividing structure may be the hub component of the rotor assembly or a partition separating different levels of rotor blades within the rotor assembly. In some cases, the FTCs may be configured to route fluid from the first rotor blade set to a thermal energy alteration device and further route fluid from the thermal energy alteration device to the second rotor blade set.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: October 13, 2009
    Assignee: Macro-Micro Devices, Inc.
    Inventor: Shaaban A. Abdallah
  • Patent number: 7568883
    Abstract: A turbocharger with a two-stage compressor having first- and second-stage impellers mounted on a common shaft in a back-to-back configuration. The first-stage impeller has a boreless configuration, defining an unthreaded pilot hole receiving an unthreaded end of the shaft so as to establish a coaxial relationship between the impeller and the shaft. The first impeller further defines a hollow cylindrical pilot member that projects from the back of the impeller and is received in a portion of the bore through the second-stage impeller to position the impellers coaxially with each other. The shaft passes through the pilot member and is externally threaded for engaging threads on the inner surface of the pilot member to secure the impellers to the shaft. The bore of the second impeller has a second portion that engages an outer cylindrical surface of the shaft to establish a coaxial relationship between the shaft and impeller.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: August 4, 2009
    Assignee: Honeywell International Inc.
    Inventors: Steven D. Arnold, Gary D. Vrbas, Kristian N. Dullack, Glenn F. Thompson
  • Patent number: 7513735
    Abstract: Multistage centrifugal compressor having a horizontally openable tank, comprising a lower semi-tank and an upper semi-tank, a shaft having a series of rotors and a series of stages each of which comprising, in turn, a series of lower semi-diaphragms and a series of upper semi-diaphragms, a lower half-ring and an upper half-ring which can be coupled to form a bearing ring, the lower half-ring being fastened internally to the lower semi-tank , and the corresponding upper half-ring being fastened to the upper semi-tank , in each stage of the multistage centrifugal compressor, the lower semi-diaphragms are rigidly constrained to one another to form a first pile of lower semi-diaphragms and, the corresponding upper semi-diaphragms are rigidly constrained to one another to form a second pile of lower semi-diaphragms, the first pile can be constrained to the lower half-ring and the second pile can be constrained to the upper half-ring.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: April 7, 2009
    Assignee: Nuovo Pignone Holding S.p.A.
    Inventor: Franco Sarri
  • Patent number: 7407364
    Abstract: A two-stage radial compressor having a ported second-stage shroud, forming a passive surge control system. Thus, some proportion of the fluid is allowed to flow between the second-stage of the compressor in the vicinity of the impeller blade tips, through a port in the shroud into an upstream portion of the compressor flow path that leads into the second-stage impeller inlet. The fluid is allowed to flow in either direction, depending on the pressure difference existing between the two locations. Surge margin at higher pressure ratios is significantly increased by the ported second-stage shroud.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: August 5, 2008
    Assignee: Honeywell International, Inc.
    Inventors: Steve Don Arnold, Kristian N. Dullack, David A. Calta, Glenn F. Thompson
  • Patent number: 7241106
    Abstract: A two staged fluid propulsion apparatus of the type which utilizes prior art pitched blades combined with solid boundary layer disks supported by a novel rotating tubular flow conduit perforated to allow fluid flow to from the interior of the tube to the exterior surface positioned to outlet into spaces between a plurality of solid disks mounted within a volute case housing containing a singular fluid outlet and in communication with a plurality of fluid inlet ports.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: July 10, 2007
    Inventor: David Christopher Aviña
  • Publication number: 20070147984
    Abstract: A first compression stage and a second compression stage being arranged at positions adjacent to each other. The first centrifugal impeller and the second centrifugal impeller are arranged in such an orientation that back sides of the first centrifugal impeller and the second centrifugal impeller face to each other. A connection flow path is formed in the first housing and the second housing for introducing the compressed fluid from the first compression stage into the second compression stage. An upstream portion of the connection flow path is formed integrally with the first housing, and a downstream portion of the connection flow path is formed integrally with the second housing.
    Type: Application
    Filed: December 4, 2006
    Publication date: June 28, 2007
    Applicant: Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Toshio Takahashi, Yutaka Hirata, Kazuaki Kurihara, Nobusada Takahara
  • Patent number: 7186074
    Abstract: A drum-type rotor carries an annular row of moving blades having root portions held within a slot in the periphery of the rotor. A turbine casing surrounds the rotor and carries a static blade assembly with an annular row of static blades which, together with the annular row of moving blades, constitutes an impulse turbine stage. The static blade assembly has a radially inner static ring confronting a periphery of the rotor with a seal acting therebetween. The static blade assembly has an outer static ring which has a substantially greater thermal inertia and stiffness then the inner static ring and is capable of sufficient radial sliding relative to the casing so as to accommodate relative thermal expansion and contraction of the outer static ring and the turbine casing.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: March 6, 2007
    Assignee: Alstom Technology, Ltd.
    Inventors: David Paul Blatchford, Richard Martin Bridge, Philip David Hemsley, Alan Hesketh, Adrian Lord
  • Patent number: 7125219
    Abstract: The invention relates to a high-pressure fan which comprises an electric motor provided with a shaft that goes through it; blade wheels which are mainly made of a carbon fibre-based composite material, arranged on both sides of the electric motor and mounted directly on the shaft of the electric motor; fan housings surrounding the blade wheels; and an intermediate channel which connects a pressure opening of one fan housing to a suction opening of the other fan housing, the intermediate channel being integrated into the base structure of the high-pressure fan.
    Type: Grant
    Filed: November 11, 2002
    Date of Patent: October 24, 2006
    Assignee: Flakt Woods AB
    Inventors: Dan Sarin, Kåre Lindroos, Joni Tallgren, Ilppo Sandberg, Jari Kuokkanen, Jukka Blåfield, Olli Majamäki
  • Patent number: 7014418
    Abstract: A multi-stage compressor and associated compressor housing and method are provided. The housing defines an aperture for receiving a compressor wheel for successively compressing a gas in first and second stages. First- and second-stage inlets are fluidly connected to the aperture in generally axial directions, and first- and second-stage volutes extend at least partially annularly therearound so that each volute is configured to receive gas flowing generally radially outward from the compressor wheel. In addition, first and second passages fluidly connect the first-stage volute to the second-stage inlet. Each passage extends from the first-stage volute to a position radially outward of the second-stage volute and therefrom to the second-stage inlet at an axial position opposite the second-stage volute from the first-stage volute.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: March 21, 2006
    Assignee: Honeywell International, Inc.
    Inventors: Steve Don Arnold, Kristian N. Dullack, David A. Calta, Glenn F. Thompson
  • Patent number: 6971842
    Abstract: An exhaust hood for a turbine includes a shell casing, an external support structure, conical corner plates, and a butterfly plate. The shell casing includes an inner surface and an outer surface. The external support structure is coupled to the shell casing outer surface, and provides structural support to said shell casing. The butterfly plate is coupled to the shell casing inner surface for channeling flow into the exhaust hood and subsequently into the condenser. The butterfly plate has a substantially elliptically-shaped cross-sectional profile that facilitates reducing flow separation losses of steam flowing therethrough into the exhaust hood.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: December 6, 2005
    Assignee: General Electric Company
    Inventors: Alexander Kenneth Luniewski, Michael Thomas Hamlin, Robert Allen Cantelupe, Raymond Kenneth Overbaugh, Jr.
  • Patent number: 6910483
    Abstract: 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 provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: June 28, 2005
    Assignee: ResMed Limited
    Inventors: Geoffrey D. Daly, Alexander Virr, Stephen A. Lea, Dion Charles C. Martin, Nicholas J Reed, Larry Puckeridge, Timothy Tsun-Fai Fu
  • Patent number: 6783321
    Abstract: The shafts of upstream and downstream turbines are interconnected by a coupling. A diffuser is provided in an intermediate cavity between the upstream and downstream turbines to recover kinetic energy, as well as minimize or eliminate windage and spinning losses resultant from exposure of the coupling to the flowpath along the turbines. A radial entry inlet provides a supplemental fluid admission into the intermediate cavity, the admission being turned axially and circumferentially for joining with the flow exiting the upstream turbine for combined flow to the downstream turbine.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: August 31, 2004
    Assignee: General Electric Company
    Inventors: Norman Douglas Lathrop, Daniel Mark Brown, Edward John Sharrow, Kristin Segreto, Douglas Carl Hofer
  • Patent number: 6752589
    Abstract: A first steam turbine of a reaction stage design is retrofitted to form a second turbine of a substantially impulse stage design using common components with the first turbine. To retrofit the new steam path into the first turbine, the upper outer and inner shells and rotor of the first turbine are removed leaving the lower outer shell. A lower carrier section is installed in the lower outer shell. A lower inner shell forming part of the new steam path is installed on the lower carrier ring. The rotor forming part of the new steam path is installed. The upper inner shell is bolted to the lower inner shell encompassing the rotor and an upper carrier section is bolted to the lower carrier section. Finally, the upper outer shell is bolted to the lower outer shell. Consequently a new steam path of reduced diameter is retrofitted into a prior turbine using the prior turbines outer shell.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: June 22, 2004
    Assignee: General Electric Company
    Inventors: James Harvey Vogan, David Alan Caruso
  • Patent number: 6733230
    Abstract: An impeller pump has a pump casing (6) that defines a pump chamber. The pump chamber includes a first chamber (21) and a second chamber (22). An impeller (10) is rotatably disposed within the pump chamber. The impeller has a first groove group and a second groove group on opposite surfaces. The first groove group and the second groove group oppose to the first chamber and the second chamber, respectively, so that a fluid is draw into and discharged from the first and second chambers as the impeller rotates. The flows of the fluid discharged from the first and second chambers are converged at a converging channel (26). Pulsations of the fluid discharged from the fist and second chambers are canceled each other when the flows converge at the converging channel.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: May 11, 2004
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Satoshi Miura, Masaki Ikeya
  • Publication number: 20040086375
    Abstract: The shafts of upstream and downstream turbines are interconnected by a coupling. A diffuser is provided in an intermediate cavity between the upstream and downstream turbines to recover kinetic energy, as well as minimize or eliminate windage and spinning losses resultant from exposure of the coupling to the flowpath along the turbines. A radial entry inlet provides a supplemental fluid admission into the intermediate cavity, the admission being turned axially and circumferentially for joining with the flow exiting the upstream turbine for combined flow to the downstream turbine.
    Type: Application
    Filed: November 6, 2002
    Publication date: May 6, 2004
    Inventors: Norman Douglas Lathrop, Daniel Mark Brown, Edward John Sharrow, Kristin Segreto, Douglas Carl Hofer
  • Patent number: 6447244
    Abstract: A method of increasing the pressure of a fluid in an aircraft centrifugal pump by forcing the fluid to make multiple passes through one impeller of the aircraft centrifugal pump is provided. It includes providing fluid through a pump inlet to an aircraft impeller inlet. The fluid then exits the impeller through a first set of discharge ports and the exiting fluid is directed to a second inlet on the same impeller. The fluid then exits the impeller through a second set of discharge ports to a pump outlet. Each pass through the impeller by the fluid increases the pressure thereof.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: September 10, 2002
    Assignee: Argo-Tech Corporation
    Inventor: Martin A. Clements
  • Patent number: 6345952
    Abstract: A steam turbine has a turbine shaft directed along a turbine axis. A plurality of turbine stages, each include a guide-blade structure and a moving-blade configuration located axially downstream of the guide-blade structure. The guide-blade structure and the moving-blade configuration are provided along the turbine shaft. Each stage has an average reaction degree achievable between 5% and 70%. The reaction degree of at least two turbine stages is of different values.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: February 12, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventors: Heinrich Oeynhausen, Wilfried Ulm, Ralf Bell, Ulrich Capelle, Jan-Erik Mühle, Mikhail Simkine, Ingo Stephan, Volker Simon
  • Patent number: 6305901
    Abstract: A steam turbine has a high-pressure turbine section and a medium-pressure turbine section fluidically connected to the high-pressure turbine section. The high-pressure turbine section is a chamber configuration and the medium-pressure turbine section is a drum configuration. Alternatively, the high-pressure turbine section is a drum configuration and the medium-pressure turbine section is a chamber configuration. Alternatively, or additionally, the high-pressure turbine section is a double-flow configuration and the medium-pressure turbine section is a double-flow configuration.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: October 23, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ralf Bell, Ulrich Capelle, Armin Drosdziok, Jan-Erik Mühle, Mikhail Simkine, Ingo Stephan, Volker Simon