Non-metallic Working Member, Cylinder Or Partition Patents (Class 418/152)
  • Patent number: 10287829
    Abstract: Embodiments of the present invention are generally related to a method and apparatus for subterranean wellbores and in particular, to a method and apparatus for rotating a subsurface tubular string, such as a casing section, without rotation at the surface. More specifically, a casing section of a wellbore may be rotated to provide a cement seal with increased strength and reliability. In one embodiment, a downhole tool and rotation assembly is disclosed which imparts a torsional force to a predetermined casing section when a fluid is flowed through the downhole tool and rotation assembly.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: May 14, 2019
    Assignee: COLORADO SCHOOL OF MINES
    Inventors: William W. Fleckenstein, Alfred W. Eustes, III
  • Patent number: 10233924
    Abstract: An eccentric screw pump, comprising a rotor that extends along a longitudinal axis of the rotor from a drive end to a free end, a stator housing with an internal cavity that extends along the longitudinal axis from a stator inlet opening to a stator outlet opening and that is designed to accommodate the rotor, a drive motor with a drive shaft that is coupled with the rotor to transmit a torque, a first cardan joint which is placed within the transmission of the torque between the drive shaft and the rotor, and a stator outlet flange that is arranged in flow direction behind the rotor. The stator outlet flange comprises a flange connection plane that is oriented non-vertically to the longitudinal axis.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: March 19, 2019
    Assignee: Hugo Vogelsang Maschinenbau GmbH
    Inventor: Paul Krampe
  • Patent number: 10047735
    Abstract: The present disclosure relates to a mixing pump (10) for combining two or more substances. More specifically, the mixing pump (10) is adapted to combine controlled amounts of those substances so as to produce a mixture containing predetermined proportions of those substances. The mixing pump includes a chamber (23) lying in fluid communication with a first substance inlet (50), a second substance inlet (51) and a mixture outlet (52). The mixing pump (10) also includes a pumping member disposed in the chamber (23) and adapted to draw first and second substances from the first and second substance inlets (50,51) and to expel a mixture of those substances through the mixture outlet (52).
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: August 14, 2018
    Assignee: Perkins Engines Company Limited
    Inventor: Paul J. Smith
  • Patent number: 9957963
    Abstract: Scroll members for scroll compressors made from one or more near-net shaped powder metal processes, either wholly or partially fabricated together from sections. In certain variations, the involute scroll portion of the scroll member has a modified terminal end region. The terminal end region may include an as-sintered coupling feature comprising a tip component that forms a contact surface for contacting an opposing scroll member during compressor operation. The tip component can be a tip seal or a tip cap received by the as-sintered coupling feature. The tip cap may be sinter-bonded or otherwise coupled to the terminal end region. In other variations, a terminal end region may comprise a second material including a tribological material that forms a contact surface. Methods of making such scroll members for scroll compressors are also provided.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: May 1, 2018
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Marc J. Scancarello, Jean-Luc M. Caillat
  • Patent number: 9903369
    Abstract: Disclosed herein is a vane rotary compressor in which a fluid such as a refrigerant is compressed while a volume of a compression chamber is reduced during rotation of a rotor. There is provided a vane rotary compressor capable of preventing a delay of rotation operation of a vane by respectively forming oil films on both sides of a hinge portion of the vane in a rotation direction thereof and smoothly sliding the hinge portion.
    Type: Grant
    Filed: May 26, 2014
    Date of Patent: February 27, 2018
    Assignee: HANON SYSTEMS
    Inventors: Jung Myung Kwak, Kweon Soo Lim, Seon Joo Hong
  • Patent number: 9890786
    Abstract: A rotary compressor includes: a compressing unit that includes an annular cylinder, an end plate, an annular piston which is fit in an eccentric portion of a rotation shaft, and a vane which protrudes from the inside of a vane groove of the cylinder to the inside of an operation chamber, comes into contact with the annular piston, and partitions the operation chamber into an inlet chamber and a compression chamber. The vane is formed of steel and has a diamond-like carbon layer formed on a sliding surface with respect to the annular piston. The annular piston is formed of Ni—Cr—Mo cast iron to which 0.15 wt % to 0.45 wt % of phosphorus is added, or is formed of cast iron or steel and has an iron nitride layer formed on an outer circumferential surface thereof.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: February 13, 2018
    Assignee: FUJITSU GENERAL LIMITED
    Inventors: Junya Tanaka, Kenji Komine
  • Patent number: 9752579
    Abstract: A scroll member includes a base having a panel and a spiral blade provided to extend from the panel toward another scroll member, resin layer L1 formed on the base, and a plurality of grooves C formed on a surface of the resin layer. The plurality of grooves C are formed on the surface of resin layer L1. A cross-section of each groove C has a shape similar to a U-shape or a semicircle in which the width decreases toward the deeper position and the rate of change in width increases toward the bottom. Grooves C are formed by moving an edge of a cutting tool along the original surface of the resin layer, which is originally formed on base L0 by application or the like.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: September 5, 2017
    Assignee: TAIHO KOGYO CO., LTD.
    Inventors: Hiroshi Kanemitsu, Masanori Akizuki
  • Patent number: 9664192
    Abstract: In one embodiment, a compression mechanism unit of a rotary compressor includes a cylinder includes a cylinder chamber, a roller in the chamber, first and second vanes which come into contact with the roller and partition the chamber into a compression side and an absorption side, and a bias member which biases the vanes. On both end sides of a posterior end portion of the first vane, first vane side attachment portions having an equal dimension in the axial direction are provided. On both end sides of the second vane along the axial direction of the axis, second vane side attachment portions having an equal dimension in the axial direction are provided. The vanes are attached to the bias member via the attachment portions.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: May 30, 2017
    Assignee: TOSHIBA CARRIER CORPORATION
    Inventors: Toshimasa Aoki, Hisataka Kato, Masahiro Hatayama, Isao Kawabe, Keiichi Hasegawa
  • Patent number: 9427771
    Abstract: An orbiting scroll is fixed on a rotating table and rotated about a spiral center. A spray nozzle is positioned in the spiral center or at an outside end of the orbiting scroll and caused to discharge a coating toward a side face of a wrap portion. The spray nozzle is moved along a straight line in a radial direction while discharging the coating. When a spraying start position is set as the spiral center, a rotation angle speed of the orbiting scroll is gradually reduced in accordance with the movement of the spray nozzle. When the spraying start point is set as the outside end, the rotation angle speed of the orbiting scroll is gradually increased in accordance with the movement of the spray nozzle. As a result, the coating can be applied to the wrap portion side face evenly.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: August 30, 2016
    Assignee: ANEST IWATA CORPORATION
    Inventors: Junichi Asami, Tatsuya Minegishi, Tohru Kuwata
  • Patent number: 9322417
    Abstract: A motor assembly for a pneumatic tool includes: a motor cylinder coaxially secured in a tubular inner housing, which is coaxially secured in a tubular outer housing and has an inlet passage defining a longitudinal axis, including a valve seat, and defining forward and reverse passages that communicate with a motor chamber and extend through the valve seat, and an exhaust port that communicates with the motor chamber, and a throttle passage defined between the inner and outer housings; a motor rotor supported within the motor chamber and rotatable in a forward or reverse direction; and a rotary valve coaxially disposed in the inner housing, supported by the valve seat, and rotatable about the longitudinal axis between forward and reverse positions.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: April 26, 2016
    Assignee: BASSO INDUSTRY CORP.
    Inventors: San-Yih Su, Cheng-Wei Lai
  • Patent number: 9212662
    Abstract: A rotary vane pump includes a housing that encloses an air chamber. An intake aperture extends to the air chamber. A check valve couples with the intake aperture and includes a stop having first and second sides. A helical spring engages the first side and biases the second side against a valve seat. A porous body is disposed between the helical spring and the air chamber for preventing fluid backflow.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: December 15, 2015
    Assignee: Ford Global Technologies, LLC
    Inventor: Mohammad Ali Moetakef
  • Patent number: 9098016
    Abstract: A roller includes a cylindrical body having openings on both ends thereof and a press-fit member fitted in at least one of the openings of the cylindrical body with an outer circumferential face thereof in contact with an inner face of the cylindrical body. The outer circumferential face of the press-fit member is grooved obliquely to an axis of the cylindrical body, and the inner face of the cylindrical body is smooth at least in a portion that contacts the outer circumferential face of the press-fit member.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: August 4, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuki Moro, Noriyuki Kamiya, Hiroya Abe, Masashi Nakayama, Soichiro Fukutomi, Rei Suzuki, Takashi Innami, Yuusuke Arai
  • Patent number: 9028233
    Abstract: A rotary piston pump equipped with a motor having two counter-rotating rotary pistons. The two rotary pistons are housed in an oval pump housing. The two rotary pistons are arranged on a first output shaft and a second output shaft. The first output shaft and the second output shaft are driven and synchronized via at least one elastic element.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: May 12, 2015
    Assignee: NETZSCH-Pumpen & Systeme GmbH
    Inventors: Hans Juergen Linde, Bernhard Murrenhoff, Robert Kurz, Reinhard Denk, Josef Strassl, Thomas Boehme, Hisham Kamal, Stefan Weigl, Roger Willis, Stefan Kern, Johann Kreidl, Gunter Herr, Franz Kneidl, Mikael Tekneyan, Erwin Weber, Marcel Verhoeven, Mathias Gradl, Udo Enderle
  • Patent number: 8985977
    Abstract: An apparatus for use in a wellbore may include a stator having a bore and a rotor disposed in the bore. Either or both of the rotor and the stator may include a layer that has an asymmetrical material property profile along at least a portion of a circumference of that layer.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: March 24, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Carsten Hohl, Helmut G. Benning
  • Patent number: 8951027
    Abstract: The invention concerns a vane cell machine having a stator and a rotor that is made of a first material, the rotor having guides comprising radially displaceable vanes that rest on an inside of the stator and border work chambers at each axial end of the rotor together with the rotor, the stator and individual stationary side walls, the vanes having, at least at some contact faces with the rotor and the stator, a second material that interacts unfrictionally with the first material. It is endeavoured to keep the wear small. For this purpose, in a radially inner area, the side wall comprises a surface of a third material interacting unfrictionally with the first material and, in a radially outer area a surface made of the first material.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: February 10, 2015
    Assignee: Danfoss A/S
    Inventors: Hans Christian Petersen, Ove Thorboel Hansen, Lars Martensen, Palle Olsen, Erik Haugaard
  • Patent number: 8944789
    Abstract: A progressive cavity type motor or pump including a stator insert with a reinforcing agent dispersed in a manner to improve properties of the stator insert. The reinforcing agent may be a fiber, nanotube, metal, ceramic, or polymer. A dispersing agent may be used to obtain a homogenous distribution. A magnetic reinforcing agent may be incorporated into a stator insert. The stator insert is subjected to a magnetic field to orient the magnetic reinforcing agent in a particular orientation. The magnetic field may also reposition the magnetic reinforcing agent within the stator insert. The stator insert may be formed by injection molding, transfer, or compression molding among other methods.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: February 3, 2015
    Assignee: National Oilwell Varco, L.P.
    Inventors: Stefan Butuc, Jiinjen A. Sue, Harold A. Sreshta, Joshua A. Sicilian
  • Publication number: 20150017047
    Abstract: The present invention recites a method of fabricating a stator for a downhole motor, the method comprising the steps of providing a stator tube having an interior surface and applying a bonding agent to the interior surface of the stator tube. Additionally, a mandrel is positioned within the stator tube, the mandrel having an outer geometry that is complimentary to a desired inner geometry for the stator. Furthermore, a reinforcing material is introduced into the stator tube to fill space between the mandrel and the interior surface of the stator tube and subsequently solidified to bond the reinforcing material to the interior surface of the stator tube. The mandrel is then removed from the bonded stator tube and reinforcing material such that a stator is fabricated.
    Type: Application
    Filed: July 14, 2014
    Publication date: January 15, 2015
    Inventors: Hossein Akbari, Julien Ramier, Olivier Sindt
  • Patent number: 8905733
    Abstract: A progressing cavity pump/motor includes a stator (12) having a metal interior surface (14) and one or more spiraling internal lobes (16). The rotor (18) has a metal exterior surface (20) and one or more spiraling external lobes (22) for cooperating with the stator to form progressing cavities between the stator and the rotor during rotation of the rotor. At least one of the stator interior surface and the rotor exterior surface include a plurality of spaced grooves (30) in the respective surface, such that fluid flowing to a gap between the stator and the rotor is disrupted by the spaced grooves to reduce fluid leakage between the stator and the rotor.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: December 9, 2014
    Assignee: Robbins & Myers Energy Systems L.P.
    Inventor: Michael Guidry, Jr.
  • Patent number: 8888474
    Abstract: In an aspect, the disclosure provides an apparatus for use downhole. In one aspect the apparatus includes a rotor with lobes disposed in stator with lobes, wherein at least one of the contours of the rotor lobe and the contour of the stator lobe is asymmetric.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: November 18, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Carsten Hohl, Harald Grimmer
  • Patent number: 8858202
    Abstract: The rotary diaphragm pump has a flexible, resilient diaphragm band surrounding an elliptical frame within a case having four chambers surrounding an elliptical core. An articulating mechanism has a plurality of wheels traveling along the elliptical edges of the frame. The mechanism extends and retracts as the wheels move from maximum extension along the major axis of their elliptical tracks to minimum extension at the minor axis of their tracks. This mechanism drives a pair of actuator rollers along the inner surface of the diaphragm, periodically forcing the diaphragm into the surrounding chambers to produce the pumping action. Each chamber has an inlet port and an outlet port. The various ports may be interconnected to provide one or more multi-stage pumps in combination with one or more single-stage pumps, as desired. Two or more pumps may be joined in tandem to provide greater capacity from a single drive shaft.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: October 14, 2014
    Assignee: Kuwait University
    Inventor: Osama M. Al-Hawaj
  • Publication number: 20140294645
    Abstract: This disclosure describes new construction for rotary elements that find use in rotary displacement devices, e.g., positive displacement pumps and meters. The proposed construction may incorporate fibers, e.g., carbon fibers, disposed in a resin matrix. This construction can reduce the need to perform secondary processes that are necessary to utilize many rotary elements of conventional design. Moreover, examples of the rotary elements can improve operation of the displacement devices, e.g., by reducing resonance and allowing the displacement device to operate at increased speed.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Applicant: Dresser Inc.
    Inventors: Dale Eugene Husted, Niravkumar V. Patel
  • Patent number: 8840385
    Abstract: A fluid pump includes a motor, an inner gear rotor and an outer gear rotor. The inner gear rotor is driven for rotation about an axis by the motor and has a plurality of outwardly extending teeth. The outer gear rotor has a plurality of inwardly extending teeth that are engaged by the teeth of the inner gear rotor so that the outer gear rotor is driven for rotation about a second axis when the inner gear rotor rotates. At least one of the inner gear rotor and the outer gear rotor is formed from a plastic material.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: September 23, 2014
    Assignee: TI Group Automotive Systems, L.L.C.
    Inventors: Wayne T. Lipinski, Joseph M. Ross
  • Patent number: 8821138
    Abstract: According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to the outer gerotor. The inner gerotor includes one or more entrance passages operable to communicate a lubricant into the outer gerotor chamber.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: September 2, 2014
    Assignee: The Texas A&M University System
    Inventors: Mark T. Holtzapple, George A. Rabroker
  • Patent number: 8777598
    Abstract: The present invention recites a method of fabricating a stator for a downhole motor, the method comprising the steps of providing a stator tube having an interior surface and applying a bonding agent to the interior surface of the stator tube. Additionally, a mandrel is positioned within the stator tube, the mandrel having an outer geometry that is complimentary to a desired inner geometry for the stator. Furthermore, a reinforcing material is introduced into the stator tube to fill space between the mandrel and the interior surface of the stator tube and subsequently solidified to bond the reinforcing material to the interior surface of the stator tube, The mandrel is then removed from the bonded stator tube and reinforcing material such that a stator is fabricated.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: July 15, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Hossein Akbari, Julien Ramier, Olivier Sindt
  • Patent number: 8764420
    Abstract: An eccentric-screw pump has an axially split stator having axially opposite intake and output ends and an elastomeric liner defining an axially throughgoing passage. Respective intake and output housings are releasably secured to the intake and output ends of the stator. An axially extending screw rotor in the passage has an end in the intake housing. A drive includes a rotatable universal joint having a pair of relatively swivelable parts in the intake housing. Respective generally complementary formations on the end of the rotor and on one of the universal-joint parts can fit axially together to rotationally couple the one universal-joint part with the rotor. A latch secures the formations axially together for angular force transmission between the one universal-joint part and the rotor.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: July 1, 2014
    Assignee: seepex GmbH
    Inventors: Dirk Overmeier, Marcel Griesdorn, Vsevolod Ryvkin
  • Patent number: 8740593
    Abstract: Vane pump mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring is supported by a journal bearing. A relatively low sliding velocity is imposed between the cam ring and the vanes. This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: June 3, 2014
    Assignee: Eaton Industrial Corporation
    Inventors: Martin A. Clements, Lowell D. Hansen
  • Publication number: 20140099226
    Abstract: The present disclosure relates to a simplified roots-type blower having an improved sound signature. The roots-type blower includes a rotor bore housing having a molded, one-piece polymeric construction. The rotor bore housing defines a first rotor bore and a second rotor bore. The rotor bore housing also defines a first bearing pocket corresponding to the first rotor bore and a bearing pocket corresponding to the second rotor bore axis. The rotor bore housing further defining a timing gear chamber.
    Type: Application
    Filed: December 2, 2013
    Publication date: April 10, 2014
    Inventors: William Nicholas EYBERGEN, Kelly Ann WILLIAMS
  • Patent number: 8678798
    Abstract: A rotary pump device is provided in which a drive shaft is inserted into a center hole of a cylinder that forms rotor chambers, and into outer rotors and inner rotors of rotary pumps. In the rotary pump device, seal mechanisms that include hollow-shaped resin members and annular rubber members are arranged on an opposite side to the cylinder with respect to the rotary pumps. Metal rings are arranged in hollow portions of the resin members in the seal mechanisms so that the drive shaft is inserted into an inner periphery of the metal rings with a minimum clearance.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: March 25, 2014
    Assignees: Advics Co., Ltd., Denso Corporation
    Inventors: Yuki Nakamura, Kunihito Ando, Nobuhiko Yoshioka, Takahiro Naganuma, Tomoaki Kawabata
  • Patent number: 8579619
    Abstract: The invention relates to an internal gear pump for a braking system, in the pump housing of which an inner toothed hollow wheel and a gearwheel engaging in the toothing of the hollow wheel are mounted to rotate about parallel axes. The toothing thereof defines a tapering roughly crescent-shaped pump chamber, in which a filling piece is arranged supported along the length thereof. The circumferential surfaces of the filling piece closely correspond to the head diameter of the inner toothing of the hollow wheel or the gearwheel toothing and contact in a sealing manner with several tooth crowns covered thereby. A radial supporting force acts over a longitudinal range of the filling piece for improved sealing of a circumferential surface of the filling piece against the tooth crowns supporting the circumferential surface.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: November 12, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Rene Schepp, Norbert Alaze
  • Patent number: 8550792
    Abstract: A device configured for converting energy includes a first surface, a second surface configured for moving with respect to the first surface during operation of the device, and a coating disposed on at least one of the first surface and the second surface. The coating includes a first layer of a ceramic alloy represented by the general formula AlMgB14—X, wherein X is present in an amount of from 0 to 70 parts by weight based on 100 parts by weight of the ceramic alloy and is a doping agent selected from the group of Group IV elements and borides and nitrides thereof, and a second layer disposed on the first layer and including carbon in a gradient concentration. The coating has a hardness of from 10 to 20 GPa and a coefficient of friction of less than or equal to 0.12.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: October 8, 2013
    Assignee: Eaton Corporation
    Inventors: Lyudmila Mikhaylovna Solovyeva, Kyle S. Jansson, Alaa AbdelAzim Elmoursi, Dong Zhu, Robert Milner, Earl Eugene Daugherty, Clifton Baxter Higdon, Kamel Abdel-Khalik Elagamy, Aaron Michael Hicks
  • Patent number: 8444405
    Abstract: A fluid device includes a housing and a rotor assembly disposed in the housing. The rotor assembly includes a core and a coating. The core has a first surface, an oppositely disposed second surface and an outer peripheral surface that extends between the first and second surfaces. The core defines a bore that extends through the first and second surfaces. The coating coats at least a portion of the core. The coating is a water-swellable plastic material.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: May 21, 2013
    Inventors: Matthew Hollister, Doug Purdy, Dustin Featherstone
  • Patent number: 8444901
    Abstract: The present application discloses a progressive cavity motor or pump component, either stator or rotor, which provides a high glass transition temperature polymeric surface on the component which becomes resilient at or below the expected operating temperature of the motor or pump, but which remains solid at ambient temperatures, along with a method of fabricating either a stator or a rotor with such surface characteristics. Since the surface becomes resilient, the progressive cavity pump operates efficiently at temperatures above the glass transition temperature of the selected polymeric surface.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: May 21, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Olivier Sindt, Hossein Akbari, Julien Ramier
  • Patent number: 8439658
    Abstract: A progressing cavity pump assembly utilizes a reinforced upper section of the stator rubber helix. The pump stator is located at the end of a string of tubing. The reinforced upper section of the stator rubber helix is strong enough, whether reinforced by mechanical means or by strengthening the rubber matrix chemically, so as not to allow the passage of a stop located above or on the top of the pump rotor. The rotor is lowered on a string of rods until the stop above or on top of the rotor lands onto the reinforced upper section of the stator rubber helix. The rotor is then repositioned away from the stator helix a predetermined distance before pump operation begins with rod string rotation.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: May 14, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Nicholas D. Johnson
  • Publication number: 20130108499
    Abstract: The invention concerns a vane cell machine having a stator and a rotor that is made of a first material, the rotor having guides comprising radially displaceable vanes that rest on an inside of the stator and border work chambers at each axial end of the rotor together with the rotor, the stator and individual stationary side walls, the vanes having, at least at some contact faces with the rotor and the stator, a second material that interacts unfrictionally with the first material. It is endeavoured to keep the wear small. For this purpose, in a radially inner area, the side wall comprises a surface of a third material interacting unfrictionally with the first material and, in a radially outer area a surface made of the first material.
    Type: Application
    Filed: October 24, 2012
    Publication date: May 2, 2013
    Applicant: Danfoss A/S
    Inventors: Hans Christian Petersen, Ove Thorboel Hansen, Lars Martensen, Palle Olsen, Erik Haugaard
  • Patent number: 8419398
    Abstract: In a pump system, a process fluid is directed into inlet chambers of a pump casing at an inlet pressure, and a plurality of rotors disposed inside the pump casing are rotated to pump the process fluid from the inlet chambers to an outlet chamber located between the inlet chambers, wherein the process fluid in the outlet chambers is at an outlet pressure. The process fluid is directed from the outlet chamber to a separator configured to separate particulate matter from the process fluid, and a portion of separated process fluid is directed from the separator to a gear chamber of the pump. Pump bearings are lubricated with the portion of separated process fluid from the gear chamber. Some of the portion of the separated process fluid from the pump bearing is leaked to the inlet chambers via rotor shrouds to reduce accumulation of particulate matter in the inlet chambers.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: April 16, 2013
    Assignee: General Electric Company
    Inventors: Vasanth Kothnur, David Deloyd Anderson, Farshad Ghasripoor, Michael V. Drexel, Thomas Steen, Hrishikesh Vishvas Deo
  • Patent number: 8419396
    Abstract: An upper casing receives a rotor, which is rotated by a drive force of a motor. The upper casing includes a pump chamber, which receives the rotor, a planar surface portion, which is formed around an opening of the pump chamber, and a through hole. A lower casing includes a planar surface portion, which is formed around the opening of the pump chamber, and a through hole. The lower casing closes the opening of the pump chamber to form the pump chamber in cooperation with the upper casing. A resilient sheet is placed between the lower casing and a mount portion of the motor and includes a through hole. A screw is received through the through holes of the upper casing, the lower casing and the resilient sheet to securely connect the upper casing, the lower casing and the resilient sheet to the mount portion. A lower casing side surface of the resilient sheet includes a plurality of primary protrusions.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: April 16, 2013
    Assignee: Denso Corporation
    Inventors: Taiki Yasuzaka, Mitsuyuki Kobayashi, Hitoshi Amano
  • Patent number: 8403656
    Abstract: A rotary displacement pump includes a stator (42) fixed in a housing (20), a rotor including a shaft portion (8), a radially protruding web (12), a scraper (110) having an engagement slot (112) engaging the protruding web (12). A guide (92) retains the scraper (110) in a circumferential direction and allows the scraper (110) to move reciprocatingly in a substantially axial direction. The stator (42) includes first and second members that abut each other in abutment areas having a circular arc configuration.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: March 26, 2013
    Assignee: Watson-Marlow GmbH
    Inventor: Ulrich Fromm
  • Patent number: 8348647
    Abstract: A scroll type compressor includes a fixed scroll having a suction opening, a movable scroll, a hermetically sealed container having an upper cap, and a suction pipe that penetrates through the upper cap and is engagedly fitted through an O ring in the suction opening of the fixed scroll at a lower portion thereof. The upper cap includes a pipe stand formed of iron at a suction-pipe penetrating portion thereof. The suction pipe comprises an iron lower suction member that is engagedly fitted in the suction opening of the fixed scroll and an O-ring groove in which the O ring is fitted, and a copper upper suction member that is joined to the lower suction member by brazing and engagedly fitted in the pipe stand. The upper suction member and the pipe stand are joined to each other by brazing.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: January 8, 2013
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yasunori Kiyokawa, Satoshi Iitsuka, Kazuyoshi Sugimoto
  • Patent number: 8337182
    Abstract: A skinned rotor 201 or skinned stator 305 of a progressive cavity apparatus is described. A rotor 201 can be skinned by threading a sleeve 210 with a profiled helical outer 212 and profiled helical inner 214 surface onto a core 202 with a profiled helical outer surface 204. A rotor (1301, 1401) can also be skinned by inserting a non-helical core (1302, 1402) into a non-helical longitudinal bore (1314, 1414) of a sleeve (1310, 1410) with a profiled helical outer surface (1312, 1412). A stator 305 can be skinned by threading a tubular liner 310 with profiled helical inner 314 and profiled helical outer 312 surfaces into a profiled helical bore 308 of a tube 306. A stator (2405, 2505) can also be skinned by inserting a tubular liner (2410, 2510) with a non-helical outer surface (2412, 2512) into a non-helical bore (2408, 2508) of a tube (2406, 2506).
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: December 25, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Lawrence Lee, Robert Ian Robson, Olivier Sindt, Michael Shepherd, Norman Ward
  • Publication number: 20120308413
    Abstract: A toothed wheel (16) is provided with teeth, in which a cross section of a respective first section (24) of the tooth (23) has an outer contour that projects in at least one partial area of the outer contour relative to an outer contour of the adjoining second section (26) of the tooth (23), and is elastically designed and/or mounted, as well as a pump unit, in particular as a metering pump unit, with a drive having a toothed gearing with the toothed wheel.
    Type: Application
    Filed: February 16, 2011
    Publication date: December 6, 2012
    Applicant: GRUNDFOS MAMAGEMENT A/S
    Inventors: Klaus Müller, Sergei Gerz, Ralf Haas
  • Patent number: 8308463
    Abstract: The present invention is to provide a screw rotor including a resin rotor formed around a metallic shaft without generation of cracks. Spiral chamfers are formed on surfaces of metallic shafts around which resin rotors are formed. Preferably the surfaces of the shafts may be sandblasted, and after the surfaces of the shafts are preliminarily coated with resin and then the rotors may be molded.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: November 13, 2012
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Yasuto Kataoka, Naoki Kikuchi, Junichiro Totsuka, Naoya Fujiwara
  • Patent number: 8246332
    Abstract: A rotor (1-3) molded of plastic material, intended for rotary installation in a cavity of a pump body and for reception of one or more vanes forming the pumping members, characterized in that at least a part of the surfaces thereof, intended to undergo sliding displacements against other pump members, is covered by at least one metallic foil (4) caused to adhere to the subjacent surface of plastic material. The metallic foil can consist of a steel sheet or an aluminum alloy sheet, intended for reducing the resistances to the sliding as well as for mechanically reinforcing the rotor. The metallic foil can be fastened to the plastic material body (1) of the rotor by a co-molding operation, or it can be mechanically fixed to the body (1) of the rotor molded of plastic material.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: August 21, 2012
    Assignee: VHIT S.p.A.
    Inventors: Leonardo Cadeddu, Franco Fermini, Vittorio Polloni
  • Patent number: 8197241
    Abstract: A Moineau device includes a stator that interfaces to a rotor whereby fluid flows through cavities between the stator and rotor that progress axially as the rotor is rotated relative to the stator. At least one of the stator and the rotor is realized from a nanocomposite that includes a polymeric matrix with carbon nanotubes dispersed therein.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: June 12, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Agathe Robisson, Hossein Akbari, Julien Ramier, Olivier Sindt
  • Patent number: 8167597
    Abstract: A bearing material composition that lines a support includes a combination of a thermoplastic conforming material and abrasive particles which provide a combined effect for remedying the effects due to edge loading that may be caused by misalignment between the bearing and a shaft to which a portion is rotatably mounted. The conforming material may be PTFE such that it does not have a memory and is subject to cold flow and creep. As a result, misalignment problems and edge loading are remedied by the combination of abrasive removal of metal material from the drive shaft at the location of edge loading and creep of the conforming material at the location of edge loading which may provide an overall greater bearing interface surface.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: May 1, 2012
    Assignee: Bitzer Scroll Inc.
    Inventor: James W. Bush
  • Patent number: 8152499
    Abstract: An eccentric screw pump with an annular outer part (10; 40; 74) and an inner part (12; 42; 72) arranged therein has an interior of the outer part (10; 40; 74) and an exterior of the inner part (12; 42; 72) tapering in a complementary manner towards an axial end (16; 46; 70). In the axial direction (X, W), the inner part (12; 42; 72) and the outer part (10; 40; 74) are movably received in relation to each other and the inner part (12; 42; 72) and/or the outer part (10; 40; 74) are configured in such a manner that pressure applied to the pressure side of the eccentric screw pump generates a force that acts upon the inner part (12; 42; 72) axially to the direction in which the inner part (12; 42; 72) tapers and/or a force that acts upon the outer part (10; 40; 74) in an opposite axial direction.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: April 10, 2012
    Assignee: Grundfos Management a/s
    Inventors: Esben Grønborg Brun, Søren Hansen, Per Höjsgaard Andreasen, Helge Grann
  • Publication number: 20120063942
    Abstract: A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller.
    Type: Application
    Filed: August 4, 2011
    Publication date: March 15, 2012
    Inventors: Jeffrey A. LaRose, Charles R. Shambaugh
  • Publication number: 20120034124
    Abstract: A non-lubricated, rotary vane compressor of maximum 10-70 litres/minute capacity, and having a pump body defining a cavity; a rotor having a cylindrical body housed in the cavity; a number of vanes; an inlet and outlet connected to the cavity; and a non-return valve fitted to the outlet.
    Type: Application
    Filed: December 7, 2009
    Publication date: February 9, 2012
    Applicant: TEX GLOBAL S.r.l.
    Inventor: Sergio Lolli
  • Patent number: 8096792
    Abstract: The present invention provides a scroll type fluid machine realizing reduced attachment space in a casing and improvement in workability at the time of assembly and the like by using a plurality of ball coupling mechanisms. A plurality of ball coupling mechanisms are disposed between a casing and a rear side of an orbiting scroll. Each of the ball coupling mechanisms includes first and second thrust receivers (reception plates), a sphere, and a cylindrical ring. A thrust load to be applied to an end plate of the orbiting scroll is received between the first and second thrust receivers (reception plates) and the sphere. The cylindrical ring disposed between the first and second thrust receivers displays a so-called rotation preventing effect in such a manner that its outer peripheral surface makes a rolling contact with inner peripheral surfaces of cylindrical portions in association with an orbiting motion of the orbiting scroll.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: January 17, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Kazutaka Suefuji, Yuji Komai, Susumu Sakamoto
  • Patent number: 8033802
    Abstract: The invention relates to a stator casing for eccentric worm pumps comprising an elastic lining, the cylindrical stator casing having a surface on the inner side, along the longitudinal axis whereof grooves are incorporated.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: October 11, 2011
    Assignee: NETZSCH-Mohnopumpen GmbH
    Inventors: Mikael Tekneyan, Helmuth Weber, Johann Kreidl, Hisham Kamal
  • Patent number: 7997882
    Abstract: A vane pump with a reduced rotor diameter is provided. The reduced rotor diameter allows a reduction in the overall size of the pump which allows the pump to be used in circumstances wherein sufficient packaging volume does not exist for conventional vane pumps. Further, the reduced rotor diameter permits operation of the pump at a higher speed, in comparison to conventional vane pumps, for a given working fluid and pump rate. The rotor includes an integrally formed drive shaft and a cylindrical rotor head. Both fixed displacement and variable displacement embodiments are shown.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: August 16, 2011
    Assignee: Magna Powertrain Inc.
    Inventors: David R. Shulver, Stefan Olaru, Matthew Williamson