Having Each Radial Protuberance Of Like Dimension Patents (Class 418/206.1)
  • Patent number: 10436197
    Abstract: A blower may include a blower housing that may include a plurality of rotor chambers and a plurality of rotors. The plurality of rotors may be substantially identical and each may include a twist angle and a helix angle. The rotors and the blower housing may be configured to create internal fluid compression when the rotors are rotating at a first rotational speed and not to create internal fluid compression when the rotors are rotating at a second rotational speed. The rotors and the blower housing may be configured to create the internal fluid compression without backflow slots in the blower housing. The twist angle may include the angular displacement of lobes of the plurality of rotors between axial ends of the plurality of rotors. The helix angle may be a function of the twist angle and a pitch diameter of the plurality of rotors.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: October 8, 2019
    Assignee: Eaton Intelligent Power Limited
    Inventor: Matthew G. Swartzlander
  • Patent number: 10288067
    Abstract: The invention relates to an electric motor-driven motor-vehicle vacuum pump (1), having a drive shaft (3) which has, in particular, two bearings and extends with a shaft stub (5; 35; 45) into a rotor (8) which is connected fixedly to the shaft stub so as to rotate with it. In the rotor, the shaft stub has a centring region (26; 36; 46) which serves to center the rotor, without guiding the rotor in the axial direction.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: May 14, 2019
    Assignee: MAGNA POWERTRAIN BAD HOMBURG GMBH
    Inventors: Dietmar Moeser, Benjamin Pyrdok, Freddy Schönwald, Carsten Sczesny, Daniel Ziehr
  • Patent number: 9683567
    Abstract: A drive rotation shaft is rotatably supported by a first slide bearing between a rotor part and a pump rotor, and is rotatably supported by a second slide bearing on its distal end side of a pump rotor fixing part of the drive rotation shaft. Working oil is supplied to the first slide bearing and the second slide bearing. According to this configuration, since the distal end side of the drive rotation part is rotatably supported by the second slide bearing, inclination of the drive rotation shaft is restricted by an inner peripheral surface of the second slide bearing, thereby suppressing occurrence of noise.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: June 20, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventor: Takayuki Chikaoka
  • Patent number: 9273555
    Abstract: A rotary positive displacement pump has a front-loading seal arrangement to better accommodate servicing and cleaning of the pump body. The pump includes a sliding seal subassembly disposed in a volume between a central portion of a rotor that is received on a shaft of a gear case and the hub of the pump body. A related method of modifying a rotary positive displacement pump enables a conventional pump with a rear-side seal arrangement to be transformed into a pump having a front-loading seal arrangement. In addition to the reduction of a dead zone in which turbulent flow does not occur by inclusion of the sliding seal subassembly, other modifications to the pump body improve the ability of the pump to be cleaned in place.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: March 1, 2016
    Assignee: Ampco Pumps Company
    Inventors: Bob Garner, James G. Rankel
  • Patent number: 9194102
    Abstract: An air diverter system for a vacuum excavator is disclosed. In a particular embodiment, the system includes a bag house in communication with a debris tank. In addition, the system includes a filter housing secured to a side of the bag house and a valve housing interposed between the bag house and the filter housing. A valve member is mounted within the valve housing and is configured to rotate about an axis to define at least two different passageways for an air flow. The system also includes a selector for rotating the valve member and selectively aligning the passageway for the airflow between a vacuum pump inlet and either the filter housing or the bag house.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: November 24, 2015
    Assignee: VAC-TRON EQUIPMENT, LLC
    Inventor: Don M. Buckner
  • Patent number: 9062678
    Abstract: A hermetically sealed compressor in which the occurrence of heat generation and insulation breakdown is reduced at the connection portion between a lead wire of a motor and an external terminal is configured as follows. The compressor main body and the motor are integrally structured. The flow path of a fluid to be compressed is in fluid communication with the internal space of the motor. The stator of the motor is formed by winding each of a plurality of independent coils in multiple turns. Each of the coils is provided with a separate external terminal.
    Type: Grant
    Filed: May 30, 2011
    Date of Patent: June 23, 2015
    Assignee: Kobe Steel, Ltd.
    Inventor: Noboru Tsuboi
  • Patent number: 9033690
    Abstract: A scavenge gear pump and its method of operation is described. The scavenge gear pump includes a pump housing defining a pump chamber, an inlet passage, an outlet passage, and a fluid injection passage in fluid communication with the pump chamber. The inlet passage receives an admixed fluid at low pressure and the outlet passage the admixed fluid at high pressure from a downstream region of said pump chamber. The fluid injection passage receives a third fluid at an injection pressure for input into the pump chamber. A pair of driveable gears is disposed in the pump chamber. The third fluid is injected directly into the gear meshing area of the pump chamber through the fluid injection passage so that the third fluid fills voids at least between said intermeshing teeth of the driveable gears and so that the second fluid does not occupy the gear meshing area.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: May 19, 2015
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Daniel Alecu, Pierre Gauvin, Ritchie Domingo
  • Patent number: 9022761
    Abstract: Elliptical or oval shaped gears of a positive displacement gear pump are disclosed. The gears have specially designed teeth at the ends of the gears' major and minor diameter axes. For example the teeth at the ends regions of the major diameter axes include radially extending wipers or vanes that extend and run against the circular gear case bore walls to seal liquid slip paths at radial running clearance areas between the tips of the gear teeth and the case bores. The pump may also have moveable wearplates on one or both sides of the gears that may be loaded laterally to seal liquid slip paths at lateral running clearance areas between the side faces of the gears and the pump faceplate and backplate.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: May 5, 2015
    Assignee: Roper Pump Company
    Inventor: William D. Flavelle
  • Publication number: 20150118086
    Abstract: A Roots-type blower may include first and second meshed, lobed rotors disposed in first and second chambers of a housing. Each lobe may have first and second axially facing end surfaces defining a twist angle that may be a function, at least partially, of the number of lobes on each rotor. A blower housing may include a bearing plate that may include one or more internal pressure relief ports. A pressure relief port may be configured to relieve fluid pressure from a trapping area that may form between first and second meshed rotors.
    Type: Application
    Filed: December 19, 2014
    Publication date: April 30, 2015
    Inventor: Matthew G. Swartzlander
  • Patent number: 9017052
    Abstract: An improved positive displacement pump provides improved wear characteristics. Specifically, rotor pads are provided on faces relative to an internal portion of the rotor housing as it relates to an end wall and a rear side of a cover plate. The rotor pads preferably have at least one of anti-galling and/or anti-friction or anti-wear characteristics thereby providing improvements over the prior art. A central member is preferably provided so that pad replacement may be relatively easily performed in the field in clean in place operations.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: April 28, 2015
    Inventor: Harry Soderstrom
  • Patent number: 8992193
    Abstract: An input shaft assembly is movable along an axis to absorb external impact loads. A biasing member exerts an axial load in a direction counter to potential impact loads. A stop is provided to control the application of biasing loads to control application of such axial load.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: March 31, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Timothy P. Walgren, Steven A. Heitz
  • Publication number: 20150050174
    Abstract: A rotary piston pump for the delivery of liquids and for the delivery of liquids containing solids. The rotary piston pump includes a pump housing which is provided with an inlet and an outlet. The pump housing includes a lining. Disposed in the pump housing, or inside the lining, are at least two counter-rotating rotary pistons, which form pump spaces during their rotation. During the rotational movement, the rotary pistons are sealed against one another, against the pump housing and against the lining. Disposed in the pump housing and/or in the lining, in the spatial vicinity of the inlet and/or the outlet, are means with which the pulsation can be reduced or even completely prevented.
    Type: Application
    Filed: November 3, 2014
    Publication date: February 19, 2015
    Inventors: Stefan Weigl, Reinhard Denk, Hisham Kamal, Josef Strassl, Robert Kurz, Bernhard Murrenhoff, Thomas Boehme, Gunther Herr, Franz Kneidl, Mikael Tekneyan, Matthias Gradl, Erwin Weber, Roger Willis, Stefan Kern, Johann Kreidl, Marcel Verhoeven
  • Patent number: 8944793
    Abstract: An aircraft turbine engine Fuel Metering Unit (FMU) is provided including a main gear pump having a main drive gear and a main driven gear and a servo gear pump having a servo drive gear and a servo driven gear. The main drive gear and the servo drive gear are received on an input shaft. The main driven gear is mounted to a first shaft oriented parallel to and adjacent a first side of the input shaft. The main driven gear is in meshing engagement with the main drive gear. The servo drive gear is mounted to a second shaft arranged parallel to and adjacent a second, opposite side of the input shaft. The servo driven gear is in meshing engagement with the servo drive gear.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: February 3, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Weishun Ni
  • Patent number: 8936445
    Abstract: A fluid pump includes a housing that defines a suction chamber, a discharge chamber, and a barrier having a first height, wherein the barrier is configured to separate the suction chamber from the discharge chamber. The pump also includes meshed first and second gears rotatably disposed in the housing. The gears are configured to draw relatively low-pressure fluid from the suction chamber, transform the relatively low-pressure fluid into relatively high-pressure fluid, and release the relatively high-pressure fluid into the discharge chamber. The barrier includes first and second portions configured to accept the first and second gears respectively, and a bridge connecting the first and second portions. The bridge is disposed proximately to where the gears mesh and is configured to provide a transition from the first height to a second height to thereby generate gradual re-expansion of the fluid away from the bridge.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: January 20, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Gary J. Hazelton, Joseph J. Noonchester
  • Publication number: 20140341755
    Abstract: A pump system for producing fluids from a reservoir using a wellbore having a vertical section with a casing defining an annulus, a transitional section and a horizontal section, and a production tubing having a vertical section and a horizontal section, wherein the system includes a completion with an isolation device in the annulus near the bottom of the vertical section, a gas/liquid separator for receiving produced fluids from the horizontal section, and a vertical lift pump; a continuous flow path from the terminus of the production tubing to the vertical section; a plurality of horizontal pumps in the horizontal section, each having an intake exposed to the reservoir and an outlet in the continuous flow path. The horizontal length of the production tubing is closed to the reservoir except through the horizontal pumps.
    Type: Application
    Filed: December 17, 2012
    Publication date: November 20, 2014
    Applicant: RAISE PRODUCTION, INC.
    Inventors: Eric Laing, Geoff Steele, Dan Fletcher, Herve Ohmer
  • Patent number: 8845313
    Abstract: Embodiments of an oil pump for an engine have an increased pump capacity while maintaining or marginally increasing the overall physical size of the pump. In some embodiments, this increased capacity is reflected in a pump length efficiency ratio, which compares an effective gear length (LG) of first and second pump gears used in the oil pump, to an effective housing length (LH). The effective housing length (LH) is a longitudinal distance between surfaces on opposite ends of the oil pump that must be maintained for the oil pump to fit into an available space. Accordingly, the pump length efficiency ratio indicates how much of the effective housing length (LH) can be occupied by the gears. Alternatively, the pump capacity is measured using an output flow efficiency ratio, which compares a theoretical pump flow (FP) at a given gear speed (SG) to the effective housing length (LH) of the pump.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: September 30, 2014
    Assignee: Caterpillar Inc.
    Inventors: Curtis John Graham, Adam William Ostein, Patrick William Savage, Jr., Christopher Lee Bach
  • Patent number: 8827668
    Abstract: The present invention deals with the analytical definition of a tooth profile for rotors used in gear pumps. The purpose is to obtain a pump characterized by noiseless operation, minimization of vibrations and pressure overoscillations generated in operating conditions at the beginning and end of life, and high specific displacement, in such a way to increase the delivery of the pump in given volume conditions. This profile is characterized by an active profile of the tooth flanks with involute stub-tooth with transverse contact ratio (?t) comprised in the range from 0.4 to 0.45, helical teeth with helical contact ratio (??) comprised in the range from 0.6 to 0.85, circular inactive tooth bottom and top profiles, with center (Of, Ot) and radius (rf, rt) defined by a non-dimensional parameter ? in the range from 1.1 to 1.6.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: September 9, 2014
    Assignee: Marzocchi Pompe S.p.A.
    Inventor: Catania Giuseppe
  • Publication number: 20140227122
    Abstract: In a pump chamber (12), a male rotor (20) having claw portions and a female rotor (24) having recesses into which the claw portions enter are secured to rotating shafts (18a and 18b), respectively. The female rotor is provided with hollows on an upstream side in the rotational direction of the female rotor relative to a plane L containing the rotating shafts. For the hollows, the disposed position, size and configuration are selected so that a compression pocket P and a discharge opening remain in communication with each other through the hollow throughout the time from when the compression pocket stops communicating with the discharge opening and separates from the discharge opening until the compression pocket gradually reduces to disappear, and so that the hollow stops communicating with the discharge opening at the same time as the compression pocket disappears.
    Type: Application
    Filed: July 9, 2012
    Publication date: August 14, 2014
    Applicant: ANEST IWATA CORPORATION
    Inventors: Shiro Tanigawa, Takahiro Kagami
  • Patent number: 8801402
    Abstract: An air compression device is applied in an air compressor. A rotatable pressure regulating disk and a valve are disposed in a rotor set. When external air enters an air chamber in the rotor set, the air is exhausted after being compressed through rotation of a first rotor and a second rotor. When the two rotors compress the air, a user may control the pressure regulating disk to rotate to advance or postpone exhaust of the air from the valve, so as to change an exhaust pressure in the air chamber to adjust an exhaust volume output by the rotor set. An adjustable air intake disk may further be added, so that timing adjustment can be performed during both air intake and exhaust.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: August 12, 2014
    Assignee: Cycle Arrow Technology Co. Ltd.
    Inventors: Yi-Lin Chu, Yi-Hung Hsu
  • Patent number: 8801410
    Abstract: A coupling shaft assembly includes a coupling shaft with a first radial shoulder and a second radial shoulder, the first radial shoulder and the second radial shoulder each include at least one slot to provide a lubricant flow path.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: August 12, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Satish Shantilal Shah, Timothy P. Walgren
  • Patent number: 8784087
    Abstract: A roots type fluid machine includes suction and discharge ports, rotary shafts and a pair of rotors. The rotor has a number n of lobe and valley portions with apex and bottom ends. The lobe portions are located on imaginary lines extending radially from an axis of the rotary shaft. The outer surface of each one of the rotors is generated by rotating an outline of the rotor including an arc and involute and envelope curves around and moving the outline in the direction of the axis. The arc has a radius R and a center located on the imaginary line. The involute curve is formed by an imaginary base circle having a radius r and a center located on the axis. The envelope curve is formed by an arc having a radius R. The number n is four or more. A torsional angle ? is over 360/n degrees.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: July 22, 2014
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Takayuki Hirano, Kazuho Yamada, Masato Sowa, Toshiro Fujii, Tsutomu Nasuda, Katsutoshi Shiromaru, Fumihiro Suzuki
  • Patent number: 8784086
    Abstract: Rotary piston steam engine with equal double rotary pistons is provided with a balanced rotary variable inlet cut-off valve for enhanced efficiency. The exhaust steam from the primary expansion is routed to secondary expansion avoiding back pressure for additional efficiency. The rotary valve has balanced dual inputs and outputs on opposite sides. The exhaust steam from the primary expansion is taken off when the trailing face of the rotary piston passes the inlet port of the expansion chamber housing, the exhaust outlet secondary expansion being placed approximately 180 degrees from the primary expansion inlet in the curved portion of the expansion chamber housing wherein back pressure is not imparted to the primary expansion.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: July 22, 2014
    Inventors: Errol John Smith, Kenneth Murray Smith
  • Publication number: 20140193285
    Abstract: A Roots-type blower has first and second meshed, lobed rotors disposed in first and second chambers of a housing. Each lobe has first and second axially facing end surfaces defining a twist angle that is a function, at least partially, of the number of lobes on each rotor, and each lobe further defines a helix angle that is a function of the twist angle and an axial length between the first and second axially facing end surfaces of said lobe. The lobes cooperate with an adjacent surface of the housing to define at least one blowhole that defines a control volume, occurs in a cyclic manner, and moves linearly in a direction toward the outlet port. The blowhole provides communication between adjacent control volumes.
    Type: Application
    Filed: January 17, 2014
    Publication date: July 10, 2014
    Applicant: Eaton Corporation
    Inventor: Matthew G. Swartzlander
  • Patent number: 8770955
    Abstract: A rotary pump having a variable delivery volume, including: a casing; a delivery chamber formed in the casing; at least one delivery rotor which is rotatable in the delivery chamber; an actuating member which is arranged facing a front face of the delivery rotor or surrounds the delivery rotor, and is moveable in the casing for adjusting the delivery volume; the actuating member chargeable with an actuating force which is dependent on a fluid requirement; a track which is formed in the casing and guides the actuating member on an actuating member sliding surface in a sliding contact; and a sliding material which forms at least one of the track and the actuating member sliding surface.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: July 8, 2014
    Assignee: Schwabische Huttenwerke Automotive GmbH
    Inventor: Christof Lamparski
  • Patent number: 8757992
    Abstract: An air compression device is applied in an air compressor, and mainly includes a first rotor, a second rotor, a stop disk, a transmission element and a drive element. When external air enters an air chamber in the air compression device, the air is rotated and compressed by the first rotor and the second rotor, and then is exhausted, the transmission element generates axial displacement vertically according to actual requirements on air admission or exhaust, and drives the drive element and the first rotor to displace, so as to change a capacity of the air chamber, and adjust the air output.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: June 24, 2014
    Assignee: Cycle Arrow Technology Co., Ltd.
    Inventor: Yi-Lin Chu
  • Patent number: 8757993
    Abstract: In a gear pump according to the present invention, a wall surface portion of a casing (2) includes a drive side partition surface (41) on which tooth crests (11) of a drive gear (10) slide, a driven side partition surface (42) on which tooth crests (21) of a driven gear (20) slide, a suction side inner peripheral surface (43) that connects the drive side partition surface (41) and the driven side partition surface (42) on a suction chamber (3) side, and a discharge side inner peripheral surface (44) that connects the drive side partition surface (41) and the driven side partition surface (42) on a discharge chamber (4) side.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: June 24, 2014
    Assignee: TBK Co., Ltd.
    Inventor: Tomo Sato
  • Patent number: 8726660
    Abstract: A supercharger compressor includes a plurality of rotors rotatably mounted in a housing, a first inlet for air, a second inlet for recirculated exhaust gas, and a flow separator. The flow separator is arranged interior the housing and configured to form a slideable seal with at least one rotor of the plurality of rotors, the slideable seal fluidically isolating the first inlet from the second inlet, at least in part, and retarding pressure equalization therebetween.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: May 20, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Brad Alan Boyer, Eric Warren Curtis
  • Patent number: 8708678
    Abstract: A nonmetallic pump with a gear pump assembly having an adapter spool mounted to an electric motor. The pump assembly is designed to reduce manufacturing costs and to provide access for many service and maintenance tasks to be performed without breaking any of the pipe connections. The pump assembly also includes a splined shaft system and a lubricating fluid circulation system with spiral grooves located inside a pair of bearings disposed on opposite sides of the gear flights. The assembly also includes a replaceable precision liner that surrounds the gear flights to maintain a tight tolerance for optimal performance of the pump. Also, an O-ring disposed inside the front cover of the assembly provides for operation of the pump over a wide temperature variation with relatively loose manufacturing tolerances.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: April 29, 2014
    Assignee: Pulsafeeder, Inc.
    Inventors: Stephen B. Muscarella, Philip T. Pascoe
  • Patent number: 8647089
    Abstract: A pump includes a pump body defining first and second cavities. First and second rotors are disposed in the first and second cavities between an inlet passage and an outlet passage and are in sealing relationship with each other during rotation of the rotors. A drive transmission mechanism is coupled to the first and second rotors for rotating the rotors in opposite directions. During a revolution of the first rotor, a vane projecting from the first rotor emerges from a recess of the second rotor, passes the inlet passage and the outlet passage, and enters a recess of the second rotor, while the inlet passage remains sealed from the outlet passage.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: February 11, 2014
    Inventor: Edward L. Simonds
  • Patent number: 8632324
    Abstract: A Roots-type blower has first and second meshed, lobed rotors disposed in first and second chambers of a housing. Each lobe has first and second axially facing end surfaces defining a twist angle that is a function, at least partially, of the number of lobes on each rotor, and each lobe further defines a helix angle that is a function of the twist angle and an axial length between the first and second axially facing end surfaces of said lobe. The lobes cooperate with an adjacent surface of the housing to define at least one blowhole that defines a control volume, occurs in a cyclic manner, and moves linearly in a direction toward the outlet port. The blowhole provides communication between adjacent control volumes.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: January 21, 2014
    Assignee: Eaton Corporation
    Inventor: Matthew G. Swartzlander
  • Publication number: 20140010698
    Abstract: Designs for multiple segment lobe pumps are shown. The designs include pumps using rotors having two lobes to a plurality of lobes and segments that include two segments to a plurality of segments. Designs for both vertical or straight walled conventional lobed rotors as well as helical lobe rotors are shown. The designs are applicable to a variety of rotors and number of segments. In one particular case the designs enable a three lobe helical pump.
    Type: Application
    Filed: June 13, 2013
    Publication date: January 9, 2014
    Inventor: Brian J. O'Connor
  • Patent number: 8622717
    Abstract: A high-performance oil pump for pumping oil in an internal combustion engine that eliminates or greatly reduces cavitation in the oil pump, thereby increasing the efficiency and performance of the oil pump. The present invention provides a housing having an inlet for receiving a supply of oil and an outlet for discharging the oil. At least two gears rotatably and matingly are disposed within the housing for pumping the oil from the inlet to the outlet. A pressure regulation circuit is disposed within the housing for balancing oil flow pressure between the inlet and the outlet by redirecting a portion of the oil from the outlet to the inlet when said oil flow pressure reaches a predetermined level at the outlet in order to reduce or eliminate cavitation of oil in the oil pump.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: January 7, 2014
    Assignee: Melling Tool Company
    Inventors: Michael J. Osterhaus, Nathaniel D. Stucky
  • Publication number: 20130323104
    Abstract: A scavenge gear pump and its method of operation is described. The scavenge gear pump defines a pump chamber in which a pair of toothed gears are rotatably driven to pump an oil-air mixture from an inlet passage where the oil mixture is at low pressure, to an outlet passage where the air and oil has separated and is at high pressure. The gears are intermeshed in a meshing area between the inlet and the outlet passages and an oil nozzle is provided in a downstream region disposed in relation to the gear meshing area to inject oil under pressure in that area to occupy the volumes between the intermeshed gear teeth whereby to prevent air bubbles from being carried back to an upstream region adjacent the inlet passage. Accordingly, the volumetric efficiency of the pump is improved and it is more tolerant to back pressure.
    Type: Application
    Filed: May 31, 2012
    Publication date: December 5, 2013
    Inventors: DANIEL ALECU, Pierre Gauvin, Ritchie Domingo
  • Publication number: 20130302201
    Abstract: A gear pump has a face plate 2 cooperating with central plate 24 defining a pump chamber 21 holding gears 16. The pump chamber 21 is in fluid communication with drive chamber 32 holding the rotor 40 of an electric motor. An O-ring 18 may be used to seal the face plate 2. Other elements may be sealed using a permanent seal such as glue.
    Type: Application
    Filed: May 14, 2012
    Publication date: November 14, 2013
    Inventor: Richard Weatherley
  • Patent number: 8573956
    Abstract: A dry pump includes: a plurality of cylinders; a pump chamber formed in each of the cylinders; a division wall separating pump chambers adjacent to each other; a plurality of rotors contained inside pump chambers; a rotating shaft that serves as an axis of rotation of the rotor; and a cooling medium path which is formed inside the division wall and through which a cooling medium passes.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: November 5, 2013
    Assignee: Ulvac, Inc.
    Inventor: Toshio Suzuki
  • Patent number: 8550057
    Abstract: A supercharger is provided, comprising a plurality of rotatable supercharger rotors each having a plurality of interleavable lobes configured to move air from an inlet to an outlet of the supercharger. Inner chambers in the lobes define an end opening and perforated end faces, at the end openings defining at least one port, having a length and a diameter. The at least one port is configured to operate with an associated air mass in the inner chamber to attenuate sound adjacent to the end opening.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: October 8, 2013
    Assignee: GM Global Technology Operations LLC
    Inventor: Gregory P. Prior
  • Patent number: 8539936
    Abstract: A pressure equalization system reduces or eliminates a pressure differential across supercharger rotor shaft seals. Under high boost, rotor shaft seals often fail, allowing hot compressed air into an oil lubricated space containing rotor bearings and gears (and vented to ambient pressure), reducing oil lubricating effectiveness and resulting in increased wear and failure. Under low or non boost operation, the pressure differential is reversed causing the lubricating oil to leak into the supercharger interior and accelerated rotor seal wear. The pressure equalization system includes flow restrictive seals on both rotor shafts, separated from the rotor shaft seals by vented spaces, thereby isolating the rotor shaft seals from boost or vacuum in the supercharger interior and reducing or eliminating the pressure differential across the rotor shaft seals. Maintaining close to atmospheric pressure on both sides of the rotor shaft seals during boost and vacuum operation reduces wear and failures.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: September 24, 2013
    Inventors: James E. Bell, Jan Erik Oscarsson
  • Publication number: 20130243636
    Abstract: A fuel pump for a direct injection internal combustion engine having a housing defining a pump chamber. Driven and idler toothed gears are rotatably mounted within the pump chamber so that the driven and idler gears are in mesh with each other at a predetermined location in the pump chamber. A fluid inlet is formed through the housing and open to an inlet subchamber in the pump chamber. A fluid outlet is also formed through the housing and open to an outlet subchamber in the pump chamber. A pressure relief passageway fluidly connects the inlet subchamber to the outlet subchamber and a valve is disposed in series with the pressure relief passageway. A control circuit controls the actuation of the valve to control the pump pressure at the pump outlet.
    Type: Application
    Filed: March 19, 2012
    Publication date: September 19, 2013
    Applicant: Hitachi, Ltd
    Inventors: Yosuke Tanabe, Jason Abbas, George Saikalis
  • Patent number: 8529231
    Abstract: An apparatus includes a rotation body having one or more rotary shafts having projections, and a cleaning part disposed adjacent to the projections, having one or more rotation holes into which the one or more rotary shafts are inserted, respectively, and configured to flow a cleaning material into the one or more rotation holes.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: September 10, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tea-Jin Park
  • Patent number: 8517701
    Abstract: A multistage vacuum pump has a pair of rotors disposed in each of pump chambers connected in stages. As the rotors rotate while intermeshing, a suctioned gas is compressed and discharged, angles of the rotors are adjusted so that a phase angle ?? of the rotors of adjacent pump chambers relative to a rotation angle C of the rotors during a single cycle of the pump chambers from intake to discharge and the number of stages S of the rotors satisfies ???C/S. When a rotor angle is ?1, an mth stage rotor angle is ?m, and an nth stage rotor angle is ?n in order from an upstream side of a gas flow direction, relationships of ?1<?m??n and ?1<?n, where n and m are natural numbers and n>m, are satisfied.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: August 27, 2013
    Assignee: Anest Iwata Corporation
    Inventor: Shiro Tanigawa
  • Patent number: 8512016
    Abstract: The present invention provides a dry pump including: a center cylinder which includes: a plurality of pump chambers containing an upper stage pump chamber that communicates with an intake port and a lower stage pump chamber that communicates with a discharge port; a plurality of rotors contained in the plurality of the pump chambers; a rotating shaft that is a rotation axis of the rotor; and a side face on which a communication hole is formed, the side face being intersected by the rotating shaft extending in the axial direction, and being provided adjacent to the lower stage pump chamber, and a side cover which covers the side face with the communication hole to form a space.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: August 20, 2013
    Assignee: Ulvac, Inc.
    Inventors: Toshio Suzuki, Tomonari Tanaka
  • Publication number: 20130202474
    Abstract: The invention relates to a rotary lobe pump (100) for conveying a fluid medium containing solids, comprising an inlet opening (111) and an outlet opening (112) for the medium being conveyed, two rotary lobes (121, 122) arranged in a pump casing (140) and having rotary lobe vanes engaging with other, wherein each of the two rotary lobes is fixed torque-resistantly on a respective shaft (131) and can be driven by said respective shaft, and wherein the two shafts are coupled to each other by a transmission gear arranged in a gearbox casing (152). The invention relates in particular to a rotary lobe pump in which the inlet opening and the outlet opening are arranged on a connection casing (151).
    Type: Application
    Filed: August 18, 2011
    Publication date: August 8, 2013
    Applicant: HUGO VOGELSANG MASCHINENBAU GMBH
    Inventor: Paul Krampe
  • Patent number: 8500414
    Abstract: A method of controlling a gear pump comprising two meshing gear wheels (11, 12), wherein the two gear wheels (11, 12) are driven via respective shafts (2, 3) each by a drive unit (7, 8). A current position of the one gear wheel (11, 12) is determined with respect to the current position of the other gear wheel (12, 11), and the current position of the one gear wheel (11, 12) is continuously adjusted with respect to the current position of the other gear wheel (12, 11) according to specified predefined operating conditions.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: August 6, 2013
    Assignee: Maag Pump Systems AG
    Inventor: Markus Aregger
  • Publication number: 20130156625
    Abstract: One embodiment of the pump system includes a cover housing and a main body affixed to one another for operation. A drive and idler gear may be mounted within a gear chamber in the main body for rotation there about, and inlet fluid may be provided on both the axial and radial surfaces of the drive and idler gear. The cover housing may be outfitted with one pressure relief channel or with two pressure relief channels of different geometric sizes and with different actuation pressures. The drive and/or idler gear may have dimples fashioned on an axial surface thereof, and lubricant troughs may be fashioned at various locations in the main body and/or the cover housing to reduce wear within the pump.
    Type: Application
    Filed: February 14, 2013
    Publication date: June 20, 2013
    Inventor: Laverne Schumann
  • Patent number: 8459972
    Abstract: A bi-rotational hydraulic motor having a selectively pluggable case drain with check valves incorporated into the thrust plate allowing excess lubrication fluid to pass from the bearings into the outlet port of the motor.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: June 11, 2013
    Assignee: MP Pumps, Inc.
    Inventor: Steven Buell
  • Patent number: 8459974
    Abstract: A six-blade biaxial rotary positive-displacement pump includes a casing formed with a suction port and a discharge port, a pair of rotors accommodated in the casing and having rotor shafts rotatably mounted on housings fixed to opposed ends of the casing, respectively. Each rotor is formed with six blades extending radially equiangularly about the rotor shaft. Each blade is formed so as to have a constant thickness in a rotational direction of each rotor. Each blade has an apex and a valley, and a distance between the apex and the valley is set so as to range from three to five times larger than the thickness of each blade.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: June 11, 2013
    Assignee: Anlet Co., Ltd.
    Inventors: Yasuna Yokoi, Akitomo Yokoi, Yoshinobu Ito, Toshiaki Kato, Masafumi Takeda, Kouiti Kume, Hideyuki Okano, Takashi Yokoi
  • Publication number: 20130129554
    Abstract: A lubricant pump includes a housing in which at least one pair of intermeshing gear wheels is arranged for conveying lubricant. One gear wheel is rotatably supported on a drive shaft and the other gear wheel is rotatably supported on an axially shiftable displacement unit for adjusting a variable flow volume. Axially displaceable in a housing receptacle is a control piston for hydraulically adjusting the position of the displacement unit. The control piston is configured as composite structural part and has a central longitudinal shaft and cylinder rings which include control edges for clearing or closing control channels feeding into the receptacle. The cylinder rings are made from a material which reduces friction and/or wear with respect to the receptacle, and the central longitudinal shaft has at least one section made from a material having a coefficient of thermal expansion at least substantially corresponding to the one of the receptacle.
    Type: Application
    Filed: May 11, 2011
    Publication date: May 23, 2013
    Applicant: AUDI AG
    Inventor: Jürgen Ernst
  • Patent number: 8444406
    Abstract: The invention relates to a gear pump in which the amplitudes of the pressure impulses in a pressure chamber can be significantly reduced by a suitable embodiment of a first groove and/or a second groove. The circumferential walls of a pump chamber containing the pressure chamber, in an angular range extending toward the pressure chamber, each have a respective groove communicating with the pressure chamber, by which grooves a radial spacing between the outer circumference of two gear wheels disposed in the pump chamber and the circumferential walls is increased.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: May 21, 2013
    Assignee: Robert Bosch GmbH
    Inventor: Alexander Fuchs
  • Patent number: 8439661
    Abstract: A power take-off for compressors, comprising: a first rotating element (2), predisposed to be connected on command to a motor (40); at least a second rotating element (3), kinematically connected to the first rotating element (2), which is predisposed to be connected to a first user (50); a torque limiter or clutch (4), interposed between the first rotating element (2) and the second rotating element (3).
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: May 14, 2013
    Assignee: Interpump Hydraulics S.p.A.
    Inventors: Silvano Prampolini, Luca Munerati
  • Patent number: 8430657
    Abstract: An external gear pump including seals, bearings, bushing/seal housings, choke collars and shafts that are all removable for maintenance and/or replacement without removing either endplate or internals from the case assembly. The preferred pump includes four bearing caps that can be removed without removing the pump from its mounted position. By removing the four bearing caps, access is gained inside the pump housing to all of the seals, bearings, bushing/seal housings, choke collars and most importantly, the drive and idler shafts within the pump housing. Further, the two shafts can be slipped out of the pump without disturbing the internal parts and endplates. This capability facilitates maintenance and replacement of major components without removing the pump from its mounted position.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: April 30, 2013
    Assignee: Roper Pump Company
    Inventors: James K. Simonelli, Michael A. Ingram, Laney A. Seabolt