Multistage Patents (Class 418/5)
  • Patent number: 11371502
    Abstract: A progressive cavity pump includes a sealed drive between the rotor and universal joint. The universal joint includes a socket configured to receive a drive shaft of the rotor. A cover, such as a locking nut, is disposed over the connection between the rotor and universal joint. Seals are retained in place by the locking nut to prevent abrasive materials from entering into the interface between the rotor and the universal joint.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: June 28, 2022
    Assignee: Graco Minnesota Inc.
    Inventors: David M. Muckley, Paul Michael Jones
  • Patent number: 11326602
    Abstract: A scroll compressor with a stationary scroll, an orbiting scroll, and a discharge port through which a fluid that has been compressed by both the scrolls is discharged. An end plate of the orbiting scroll is provided with an end-plate side stepped portion formed such that, along a spiral of a spiral wrap, the height thereof increases toward a central side of the spiral and decreases toward an outer end side thereof. A spiral wrap of the stationary scroll is provided with a wall-portion side stepped portion formed corresponding to the end-plate side stepped portion such that the height thereof decreases toward the central side of the spiral and increases toward the outer end side thereof. A pair of compression chambers which face each other, the ventral side compression chamber communicates with the discharge port before the dorsal side compression chamber communicates with the discharge port.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: May 10, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Takuma Yamashita, Makoto Takeuchi, Genta Yoshikawa, Akihiro Kanai, Kazuhide Watanabe
  • Patent number: 10978315
    Abstract: The present invention relates to a vacuum evacuation system used to evacuate a processing gas from one or more process chambers for use in, for example, a semiconductor-device manufacturing apparatus. The vacuum evacuation system is a vacuum apparatus for evacuating a gas from a plurality of process chambers (1). The vacuum evacuation system includes a plurality of first vacuum pumps (5) coupled to the plurality of process chambers (1) respectively, a collecting pipe (7) coupled to the plurality of first vacuum pumps (5), and a second vacuum pump (8) coupled to the collecting pipe (7).
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: April 13, 2021
    Assignee: EBARA CORPORATION
    Inventors: Atsushi Shiokawa, Tetsuro Sugiura, Shinichi Sekiguchi, Takashi Kyotani, Tetsuo Komai, Norio Kimura, Keiichi Ishikawa, Toru Osuga
  • Patent number: 10975866
    Abstract: Provided is a scroll fluid machine capable of effectively achieving performance of a tip seal installed in a tooth crest of a wall including an inclined portion. The inclined portion in which a distance between opposing surfaces of end plates facing each other gradually decreases from an outer peripheral side toward an inner peripheral side is provided. A tip seal (7) configured to make contact with a tooth base facing the tip seal (7) to perform sealing against fluid is provided in tip seal groove (3d) formed in a tooth crest of a wall (3b) corresponding to the inclined portion. In a stop state where a scroll (3) does not perform compression of fluid, an inclination height (Ls?) of the tip seal (7) is smaller than an inclination height (Ls) of the wall (3b).
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: April 13, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Hajime Sato, Yoshiyuki Kimata, Yohei Hotta
  • Patent number: 10914306
    Abstract: A stator assembly for a progressive cavity pump or a progressive cavity motor includes connectors for connecting functional elements and at least one stator, the stator including an outer pipe as well as a lining subject to wear which is disposed inside the outer pipe, the at least one stator being disposed between the connectors such that a cavity extending across the entire stator assembly for housing a rotor is created. Between at least one of the connectors and at least one stator adjacent thereto and/or between adjacent stators an adhesion region is provided, whereby in the adhesion region an adhesive is disposed in such a way that between the at least one connector and the at least one stator adjacent thereto and/or between said respectively adjacent stators a substance-to-substance connection is created.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: February 9, 2021
    Assignee: Arnold Jaeger Holding GmbH
    Inventor: Sebastian Jaeger
  • Patent number: 10590769
    Abstract: In a scroll fluid machine, a thinned section (26) is provided in correspondence with a position at which the wrap height of a spiral wrap (15B, 16B) changes due to a step part. The thinned section (26) is provided on the front-side surface or the rear-side surface of a tooth tip section of at least one of the spiral wraps (15B, 16B) of at least one of partner scrolls (15, 16) respectively engaging with scrolls (15, 16). The thinned section (26) is provided in the direction in which the wrap thickness decreases so as to extend over at least a reduced-machining-accuracy area (27), which is an area where the machining becomes discontinuous due to at least a change in the wrap height. Thus, a contact failure between the spiral wraps (15B, 16B) is avoided in the area where the machining accuracy relatively decreases as a result of increasing the machining speed, thereby achieving both improved productivity and maintained performance.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: March 17, 2020
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto Takeuchi, Ei Onogawa, Takayuki Kuwahara
  • Patent number: 10294939
    Abstract: Parts of a pump head of a scroll pump facilitate an assembly process in which the stationary and orbiting scroll blades of the pump are angularly aligned or synchronized with one another. A metallic bellows of the pump head provides a primary means of synchronizing the stationary and orbiting scroll blades. The assembly process may be carried out using a fixture configured to be mountable to an assemblage including the bellows and the orbiting plate scroll. The fixture has a reference feature, and the orbiting plate scroll or the frame has another reference feature that can be aligned with the reference feature of the fixture, in the circumferential direction of the bellows, during the course of the assembly process.
    Type: Grant
    Filed: March 19, 2016
    Date of Patent: May 21, 2019
    Assignee: Agilent Technologies, Inc.
    Inventors: John Calhoun, George Galica, Vannie (Yucong) Lu, James Pierce
  • Patent number: 10247449
    Abstract: The present disclosure provides a variable-capacity compressor, a variable-capacity two-stage compression system and a control method thereof. The compression system includes a compressor, wherein the compressor includes a low pressure cylinder and a high pressure cylinder connected in series, wherein the low pressure cylinder includes at least two cylinders connected in parallel. The compression system further includes a control mechanism that can control at least one of the at least two cylinders connected in parallel to perform full-load and/or no-load operation.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: April 2, 2019
    Assignee: Gree Electric Appliances, Inc. of Zhuhai
    Inventors: Huan Zhao, Jun Shen, Feng Tan, Youxuan Liang, Pengfei Li
  • Patent number: 10197059
    Abstract: A scroll compressor orbiting scroll bearing lubrication system includes a scroll compressor crankshaft having a lubricating fluid gallery extending therethrough between a first stage orbiting scroll and a second stage orbiting scroll. The first stage employs an orbiting scroll radial bearing and an orbiting scroll hydrodynamic thrust bearing, while the second stage employs an orbiting scroll radial bearing and an orbiting scroll hydrostatic thrust bearing. Lubricating fluid is supplied to the second stage orbiting scroll radial bearing via the lubricating fluid gallery.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: February 5, 2019
    Assignee: TRANE INTERNATIONAL INC.
    Inventors: Jerry Allen Rood, Scott Joseph Smerud, Keith Adam Novak, Joseph M. Heger, Derrick Lepak, Michael Gerard Benco
  • Patent number: 9885358
    Abstract: A three stage vacuum pump has three stages of fixed scrolls and orbiting scrolls that operate simultaneously. A motor drives the second orbiting scroll within the third fixed scroll upon three equally spaced idlers. One idler then transmits rotation and torque into the second stage. The second orbiting scroll has involutes upon both surfaces to engage the second fixed scroll inwardly and the first fixed scroll outwardly. The first fixed scroll has fins upon its back that extend into the atmosphere to transfer heat to air cool the pump. This pump also has a fan accelerating heat transfer. The pump operates the scrolls directly from a motor or from a motor and magnetic coupling so that the atmosphere does not infiltrate the pump.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: February 6, 2018
    Assignee: Air Squared, Inc.
    Inventor: Robert W. Shaffer
  • Patent number: 9360237
    Abstract: A refrigerant vapor compression system and method of operation are disclosed wherein the first (30a) and second (30b) compression stages of a two stage compression device are selectively configurable in a first arrangement and a second arrangement. In the first arrangement, the first and second compression stages operate in a series refrigerant flow relationship. In the second arrangement, the first and second compression stages (30a), (30b) operate in a parallel refrigerant flow relationship.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: June 7, 2016
    Assignee: CARRIER CORPORATION
    Inventor: Hans-Joachim Huff
  • Patent number: 9328730
    Abstract: Parts of a pump head of a scroll pump facilitate an assembly process in which the stationary and orbiting scroll blades of the pump are angularly aligned or synchronized with one another. A metallic bellows of the pump head provides a primary means of synchronizing the stationary and orbiting scroll blades. The assembly process may be carried out using a fixture configured to be mountable to an assemblage including the bellows and the orbiting plate scroll. The fixture has a reference feature, and the orbiting plate scroll or the frame has another reference feature that can be aligned with the reference feature of the fixture, in the circumferential direction of the bellows, during the course of the assembly process.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: May 3, 2016
    Assignee: Agilent Technologies, Inc.
    Inventors: John Calhoun, George Galica, Vannie (Yucong) Lu, James Pierce
  • Patent number: 9051781
    Abstract: A longer-lasting, lower cost, more powerful, all metal, mud motor than the presently available progressing cavity type mud motors for drilling boreholes into the earth. A mud motor apparatus possessing one single drive shaft that turns a rotary drill bit, which apparatus is attached to a drill pipe which provides high pressure mud to the mud motor, wherein the drive shaft receives at least a first portion of its rotational torque from any high pressure mud flowing through a first hydraulic chamber within the apparatus, and receives at least a second portion of its rotational torque from any high pressure mud flowing through a second hydraulic chamber within the apparatus. The mud motor apparatus possesses two hydraulic chambers, each having its own power stroke, and return stroke, and acting together in a controlled fashion, provide continuous power to a rotary drill bit.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: June 9, 2015
    Assignee: Smart Drilling and Completion, Inc.
    Inventor: William Banning Vail, III
  • Patent number: 9039396
    Abstract: A compressor is provided and may include a shell, a motor assembly, a drive shaft, a first compression mechanism, and a second compression mechanism. The motor assembly may be disposed within the shell. The drive shaft may be powered by the motor assembly. The first compression mechanism may be disposed within the shell and may be driven by the motor assembly. The second compression mechanism may be driven by the motor assembly.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: May 26, 2015
    Assignee: Emerson Climate Technologies, Inc.
    Inventor: Kirill M. Ignatiev
  • Patent number: 9028230
    Abstract: A three stage vacuum pump has three stages of fixed scrolls and orbiting scrolls that operate simultaneously. A motor drives the second orbiting scroll within the third fixed scroll upon three equally spaced idlers. One idler then transmits rotation and torque into the second stage. The second orbiting scroll has involutes upon both surfaces to engage the second fixed scroll inwardly and the first fixed scroll outwardly. The first fixed scroll has fins upon its back that extend into the atmosphere to transfer heat to air cool the pump. This pump also has a fan accelerating heat transfer. The pump operates the scrolls directly from a motor or from a motor and magnetic coupling so that the atmosphere does not infiltrate the pump.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: May 12, 2015
    Assignee: Air Squared, Inc.
    Inventor: Robert W. Shaffer
  • Publication number: 20150118087
    Abstract: A conventional multistage oil pump, wherein the components are formed of a ferrous material, and thus, there have been presented a problem that the weight is large. The multistage oil pump and rotors are connected in a series, wherein a rotor case, a first rotor case and a second rotor case are connected in the axial direction, and the inside thereof is partitioned by a spacer. The first rotor case and the second rotor case are jointed to the spacer with dowel pins. The rotors are formed of a ferrous material, while the spacer being formed of an aluminum-based material.
    Type: Application
    Filed: May 16, 2013
    Publication date: April 30, 2015
    Applicant: MIKUNI CORPORATION
    Inventor: Hiroyuki Oda
  • Patent number: 8985974
    Abstract: Disclosed is a vane compressor in which cylinders concentrically formed at the side of a rotor are eccentrically inserted in ring-shaped spaces between cylindrical parts concentrically formed at the side of a stator. A pair of radially extending vane attachment grooves is formed in the rotor, and vanes are slidably attached in the vane attachment grooves. Compression chambers the volumes of which repeatedly increase and decrease with each rotation of the rotor are concentrically formed in multiple stages by the cylindrical parts of the stator, the cylinders of the rotor, and comb-tooth parts of the vanes. It is possible to realize a vane compressor in which compression chambers can be concentrically arranged in multiple stages in a simple structure by suppressing increase in the number of components to the minimum level.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: March 24, 2015
    Assignee: Kashiyama Industries, Ltd.
    Inventors: Osamu Ozawa, Shuzo Tsutsumi
  • Patent number: 8985979
    Abstract: A hinged joint is formed on a volumetric rotary machine with a spherical working cavity formed between a spherical rotor part and the spherical surface of the body, between a piston, which is mounted in such a way as to enable rotary oscillations relative to the rotor in the plane passing along the axis of rotation of the rotor, and a rotor, which is mounted in such a way as to enable rotation about the spherical rotor part. This solution has made it possible to increase the reliability, service life and thermal stability of machines of this type. In addition, helical channels for communication between symmetrical working chambers and channels within the rotor for connecting the working chambers to the working-medium inlet and outlet openings are formed inside the spherical rotor part. This solution has made it possible to increase the specific power of the machine.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: March 24, 2015
    Inventors: Alexandr Vladimirovich Didin, Ilya Ykovlevich Yanovsky
  • Patent number: 8967984
    Abstract: A twin rotary compressor is provided. In the twin rotary compressor, a refrigerant suction pipe may be connected to a middle plate positioned between a first cylinder and a second cylinder to reduce a height of the first cylinder, so that heights of a first rolling piston and a first vane may also be lowered. This may allow a contact area between the first rolling piston and the first vane to be decreased so as to reduce refrigerant leakage from a first compression space of the first cylinder, resulting in improvement of compression efficiency of the compressor.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: March 3, 2015
    Assignee: LG Electronics Inc.
    Inventors: Yunhi Lee, Seungjun Lee, Minchul Yong
  • Patent number: 8956128
    Abstract: A spherical expansion compressor adapted to variable working conditions with a spherical inner chamber, comprises a rolling rotor compressor used as first-stage compression, compression working chambers, expansion working chambers, a gas tank and a pressure control circuit. The pressure control circuit is between the gas tank and a pressure-controlled inlet valve of the rolling rotor compressor, and controls the inlet valve to open/close according to pressure in the gas tank and maintains constant pressure in the tank. A working medium after first-stage compression enters the gas tank, where the pressure control circuit regulates the gas tank pressure. The working medium enters second-stage compression, and expands in the expansion-stage, forming the spherical expansion compressor adapted to variable working conditions.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: February 17, 2015
    Assignee: Xi'An Zhengan Environmental Technology Co., Ltd.
    Inventors: Luyi Wang, Nan Xia
  • Publication number: 20150037186
    Abstract: A scroll compressor includes one or more stage of compression disposed within a compressor housing. One or more of the stages includes a stationary scroll member including a base and a generally spiral wrap extending from the base of the stationary scroll member. One or more of the stages further includes an orbiting, scroll member including a substantially circular base and a substantially spiral wrap extending from the base of the orbiting scroll member. A coupling is disposed between the first scroll member base and the second scroll member base and in surrounding relationship to the first and second scroll member spiral wraps. At least one stabilizing pad is disposed between the first scroll member base and the second scroll member base and in axial thrust force relationship with the coupling to at least partially prevent tipping of the second scroll member.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 5, 2015
    Inventors: Scott Joseph Smerud, John Robert Sauls, Michael Gerard Benco, Jerry Allen Rood, Rodney Lakowske
  • Publication number: 20150037184
    Abstract: A scroll compressor orbiting scroll bearing lubrication system includes a scroll compressor crankshaft having a lubricating fluid gallery extending therethrough between a first stage orbiting scroll and a second stage orbiting scroll. The first stage employs an orbiting scroll radial bearing and an orbiting scroll hydrodynamic thrust bearing, while the second stage employs an orbiting scroll radial bearing and an orbiting scroll hydrostatic thrust bearing. Lubricating fluid is supplied to the second stage orbiting scroll radial bearing via the lubricating fluid gallery.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 5, 2015
    Inventors: Jerry Allen Rood, Scott Joseph Smerud, Keith Adam Novak, Joseph M. Heger, Derrick Lepak, Michael Gerard Benco
  • Publication number: 20150037185
    Abstract: A compressor crankshaft assembly includes a crankshaft and an eccentric drive pin extending from one end of the crankshaft. The shape of the drive pin viewed into the exposed end of the drive pin is defined by the intersection of a first cylinder that is coaxial with the axis of a substantially cylindrical orbital bearing journaled and installed to receive the eccentric drive pin and a second cylinder that is coaxial with the axis of a substantially cylindrical main bearing journaled and installed to rotatably receive the crankshaft, such that the area defined by the intersecting portion is less than the area defined by either cylinder.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 5, 2015
    Inventors: Jerry Allen Rood, Michael Gerard Benco, Scott Joseph Smerud, Wayne Gerard Gorski, Keith Adam Novak
  • 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: 20140294640
    Abstract: A scroll pump facilitates the installation of a new tip seal between an axial end of the scroll blade of one of inner stationary and orbiting plate scrolls of the pump and the plate of the other of the inner stationary plate and orbiting plate scrolls. To this end, the orbiting plate scroll has a central portion and an outer peripheral portion extending around and seated on the central portion. The outer peripheral portion of the orbiting plate scroll is keyed to and/or fastened to the central portion such that the outer peripheral portion on is not rotatable relative to the central portion and yet is axially removable from the central portion. The tip seal can be readily accessed and replaced by removing the outer peripheral portion of the orbiting scroll plate from the central portion.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Inventor: John CALHOUN
  • Publication number: 20140286806
    Abstract: A multi-stage vacuum pump may include a sealing arrangement for sealing between the stator components of the pump. The end seals of the arrangement comprise an annular portion for sealing between end stator components and shell components and axial portions which extend from the annular portion and together with separate axial seals seal between the shell components.
    Type: Application
    Filed: March 19, 2014
    Publication date: September 25, 2014
    Applicant: Edwards Limited
    Inventors: Alan Ernest Kinnaird Holbrook, Sivabalan Kailasam, Ross Gordon Eadie
  • Patent number: 8790097
    Abstract: A refrigerant compressor that enhances compressor efficiency by both reducing an amplitude of pressure pulsations and reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed at a compression unit. A low-stage discharge muffler space is formed in the shape of a ring around a drive shaft. In the low-stage discharge muffler space, a discharge port rear guide is provided in the proximity of a discharge port through which is discharged the refrigerant compressed by a low-stage compression unit. The discharge port rear guide is provided at a flow path in one direction out of two flow paths from the discharge port to a communication port in different directions around the drive shaft, and prevents the refrigerant from flowing in that direction, thereby causing the refrigerant to circulate in a forward direction in the ring-shaped discharge muffler space.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: July 29, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuhide Yokoyama, Toshihide Koda, Shin Sekiya, Kei Sasaki, Raito Kawamura, Taro Kato, Atsuyoshi Fukaya, Takeshi Fushiki, Hideaki Maeyama, Masao Tani
  • Publication number: 20140205482
    Abstract: A multi-stage vacuum pump of the dry pump type is disclosed. The multi-stage vacuum pump includes a plurality of pumping stages each respectively having an inlet and an outlet, the pumping stages being mounted in series between a suction port and a discharge port of the vacuum pump, characterized in that the vacuum pump also includes at least one valve configured to dump pressure from a pumping stage, said valve being arranged in the upper part of the vacuum pump, on the same side as the inlet of the pumping stage.
    Type: Application
    Filed: January 14, 2014
    Publication date: July 24, 2014
    Applicant: ADIXEN VACUUM PRODUCTS
    Inventor: Stephane CROCHET
  • Patent number: 8764421
    Abstract: Scroll type fluid machinery, in which two stationary scrolls (2A, 2B) are fixed onto a housing (1), and form volume changing mechanisms (50A, 50B) with matching orbiting scrolls (3A, 3B). Three orbiting units (40) are located between the two volume changing mechanisms. Each orbiting unit comprises a rotating member (10) and a thrust-cancelling shaft (20). Assembly sets of the thrust-canceling shaft consist of turning elements and a connector, which in turn connects with orbiting scrolls through threads. There exists only circumferential constraint but no axial constraint between the connector and the turning element. Rotating turning element will rotate the connector, and thus move the two orbiting scrolls closer or farther through the threads on the connector. The rotating member of this invention further provides a larger space to the supporting bearings (14A, 14B) of the thrust-canceling shaft, and also eases component manufacturing, machinery's assembly and adjustment, and bearings' cooling.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: July 1, 2014
    Assignee: Shanghai Universoon AutoParts Co.
    Inventors: Enjiu Ke, Ji Ke
  • Publication number: 20140134028
    Abstract: The present disclosure relates to a rotary vane expander for generating mechanical energy from the expansion of a gaseous medium comprising a housing, an inlet and an outlet for the gaseous medium and to a rotor arranged in the housing. Provision is made in this respect in accordance with a first aspect that the inner contour of the housing has two or more stroke regions which are in communication with the inlet for the gaseous medium so that the gaseous medium expands simultaneously in the two or more stroke regions during the operation of the energy recovery system.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Applicant: LIEBHERR-MACHINES BULLE SA
    Inventors: Bouzid Seba, Gerd Schlager
  • Patent number: 8715400
    Abstract: A double vacuum pump apparatus (Y2) includes positive displacement vacuum pumps (40A, 40B) and lines (52, 60). Each of the vacuum pumps includes a suction port (41) and a discharge port (42), and a pressure detector (80) is provided in the vicinity of the suction port (41) of the double vacuum pump apparatus (Y2). The line (52) connects the discharge port (42) of the vacuum pump (40A) to the suction port (41) of the vacuum pump (40B). The line (60) has an end (E6) and an end (E5) that are connected to the connection line (52), and includes a buffer tube (Z1) and an on-off valve (61) located between the tube (Z1) and the end (E5). A pressure detection signal from the pressure detector (80) is used as an on/off signal for the on-off valve (61).
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: May 6, 2014
    Assignee: Sumitomo Seiko Chemicals Co., Ltd.
    Inventors: Kazuo Haruna, Kiyokazu Maruta, Hidenori Kuwata, Koichi Shima
  • Patent number: 8708676
    Abstract: A variable output assembly including a hydraulic pump disposed on a pump running surface located on a center section, end cap or other hydraulic mounting member. The pump may be a gerotor or other rotatable pump body. A support member is disposed between the pump running surface and the pump and includes a pump support surface having openings to permit fluid communication between the support member and the pump running surface. The support member is movable between neutral and a plurality of positions corresponding to forward and reverse directions of the output. In forward and reverse positions, the support member permits fluid communication between the pump and a first porting system, and in the neutral position the support member permits fluid communication between the pump and a sump through the support surface openings and a second porting system.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: April 29, 2014
    Assignee: Hydro-Gear Limited Partnership
    Inventor: Nathan W. Bonny
  • Publication number: 20140105774
    Abstract: A hermetic compressor is provided that may include a fluid guide disposed in an inner space of an intermediate chamber, so as to guide oil, discharged from a first compression chamber of a first compression device into the inner space of the intermediate chamber, to a second compression chamber of a second compression device without remaining in the inner space of the intermediate chamber, whereby noise generated due to an excessive amount of oil remaining in the inner space of the intermediate chamber may be reduced, and simultaneously a shortage of oil in the second compression device may be prevented.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 17, 2014
    Inventors: Jinung SHIN, Bumdong SA, Yunhi LEE
  • Publication number: 20140037483
    Abstract: A method of operating a refrigeration system uses a plurality of compressors in connected parallel. The method includes returning refrigerant and oil to the compressors, the refrigerant also having oil entrained therein, separating the oil entrained in the refrigerant, and returning more of the oil entrained in the refrigerant to a lead compressor of the plurality of compressors regardless of whether the lead compressor is operating. The method also includes connecting the oil sumps of all of the plurality of compressors such that oil is supplied from the lead compressor to at least one non-lead compressor of the plurality of compressors when the at least one non-lead compressor is operating.
    Type: Application
    Filed: July 25, 2013
    Publication date: February 6, 2014
    Applicant: BITZER KUEHLMASCHINENBAU GMBH
    Inventors: Bruce A. Fraser, Ronald J. Duppert, Wayne P. Beagle, Kurt William Robert Bessel
  • Publication number: 20130315765
    Abstract: A three stage vacuum pump has three stages of fixed scrolls and orbiting scrolls that operate simultaneously. A motor drives the second orbiting scroll within the third fixed scroll upon three equally spaced idlers. One idler then transmits rotation and torque into the second stage. The second orbiting scroll has involutes upon both surfaces to engage the second fixed scroll inwardly and the first fixed scroll outwardly. The first fixed scroll has fins upon its back that extend into the atmosphere to transfer heat to air cool the pump. This pump also has a fan accelerating heat transfer. The pump operates the scrolls directly from a motor or from a motor and magnetic coupling so that the atmosphere does not infiltrate the pump.
    Type: Application
    Filed: July 30, 2013
    Publication date: November 28, 2013
    Inventor: Robert W. Shaffer
  • Publication number: 20130309113
    Abstract: The present invention is a multiple stage variable displacement vane pump comprising a pressure regulating spring guide. A first spring and a second spring may be controlled by said pressure regulating spring guide. The present invention does not require a solenoid or electronic control. Control of flow and speed is achieved through operable of the pressure regulating spring guide that causes the first spring and second spring to be operable in relation to one another, but for the first spring and the second spring to be operable independently of each other. The springs may be positioned to be inline in relation to each other. Rotation of a slide and pressure exerted thereby upon the pressure regulating spring guide may create a first spring regulation stage and a second spring regulation stage.
    Type: Application
    Filed: May 17, 2013
    Publication date: November 21, 2013
    Inventor: Guiseppe Rago
  • 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: 8523544
    Abstract: A three stage vacuum pump has three stages of fixed scrolls and orbiting scrolls that operate simultaneously. A motor drives the second orbiting scroll within the third fixed scroll upon three equally spaced idlers. One idler then transmits rotation and torque into the second stage. The second orbiting scroll to has involutes upon both surfaces to engage the second fixed scroll inwardly and the first fixed scroll outwardly. The first fixed scroll has fins upon its back that extend into the atmosphere to transfer heat to air cool the invention. This pump also has a fan accelerating heat transfer. The pump operates the scrolls directly from a motor or from a motor and magnetic coupling so that the atmosphere does not infiltrate the pump.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: September 3, 2013
    Assignee: Air Squared, Inc.
    Inventor: Robert W. Shaffer
  • Publication number: 20130071274
    Abstract: The present invention relates to a vacuum pumping system (10) for evacuating a vacuum chamber (12), the system comprising: a vacuum pump (16); and a plurality of forelines (22, 24) for conveying gas to the vacuum pump wherein in a first low vacuum stage of chamber evacuation a first foreline arrangement (22) can be connected for conveying gas to the vacuum pump and in a second higher vacuum stage of chamber evacuation a second foreline arrangement (22, 24) comprising one or more of said forelines can be connected for conveying gas to the vacuum pump, wherein the second foreline arrangement has a total cross-sectional area for conveying fluid which is larger than a total cross-sectional area of the first foreline arrangement.
    Type: Application
    Filed: March 30, 2011
    Publication date: March 21, 2013
    Applicant: EDWARDS LIMITED
    Inventors: Michael Andrew Galtry, David Alan Turrell
  • Patent number: 8398387
    Abstract: A fluid machine (101) includes a first compressor (107) and a second compressor (108). The first compressor (107) has a first closed casing (111), a first compression mechanism (102a), an expansion mechanism (104), and a shaft (113). A first oil reservoir (112) is formed in the first closed casing (111). The second compressor (108) has a second closed casing (125) and a second compression mechanism (102b). A second oil reservoir (126) is formed at a bottom portion in the second closed casing (125). The first closed casing (111) and the second closed casing (125) are connected to each other by an oil passage (109) so that a lubricating oil can flow between the first oil reservoir (112) and the second oil reservoir (126). An opening (109a) of the oil passage (109) on a side of the first closed casing (111) is located above the expansion mechanism (104) with respect to the vertical direction.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: March 19, 2013
    Assignee: Panasonic Corporation
    Inventors: Yu Shiotani, Hiroshi Hasegawa, Takeshi Ogata, Shingo Oyagi, Masanobu Wada, Osamu Kosuda
  • Patent number: 8388327
    Abstract: A progressing cavity pump comprises at least an inner pump rotor enclosed by at least an outer pump rotor so as to collectively form one or more, in principle, separate pump cavities which, according to known geometric principles, will be moved axially through the pump upon bringing the rotors into coordinated rotation. At least two pump sections are disposed therein, each of which comprises one outer pump rotor and one adapted inner pump rotor. The outer pump rotors of all pump sections are fixedly supported and arranged along the same axis, wherein all the inner rotors are supported in fixed positions relative to a pump casing of the pump. The outer rotors of all pump sections are driven by the same motor via at least one differential arranged to allow each pump section to rotate at a mutually different rotational speed.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: March 5, 2013
    Assignee: AGR Subsea AS
    Inventor: Sigurd Ree
  • Publication number: 20130047595
    Abstract: In a traditional hybrid air engine it is complicated to adjust valve timing to compensate for different engine operating modes. Provided is an air compression method and apparatus. The air compression method can be carried out in a single stage with a plurality of air tanks (61, 63) coupled to a compressor (51). The compressor (51) may be a cylinder Air is added to the compressor (51) at atmospheric pressure. Pressurized air is then added to the compressor (51) from a low pressure air tank (61). The compressor (51) compresses the air and transfers a portion of it to a high pressure air tank (63). The remaining portion of the compressed air is transferred to the low pressure air tank (61) for use in the next compression cycle A cam shaft (27) having a two stroke cam (93) and a four stroke cam (95) for each intake valve (59) and exhaust valve (55, 57) is provided to control valve timing during different operating modes.
    Type: Application
    Filed: May 6, 2010
    Publication date: February 28, 2013
    Inventors: Amir Khajepour, Amir M. Fazell, Cecile Devaud, Nasser Lashgarian Azad
  • Publication number: 20130017111
    Abstract: A device for varying pressure of a fluid comprising a scroll case (11) containing a fixed scroll (12) and a mobile scroll (13) relatively to the case, and with admission (A) and outlet (B) ports for the fluid, characterized in that it comprises means for thermally insulating the scrolls.
    Type: Application
    Filed: October 10, 2008
    Publication date: January 17, 2013
    Inventors: Malick Kane, Danilo Cretegny, Antoine Merminod
  • Patent number: 8303277
    Abstract: A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the first fluid. The fluid motor and pump are sized so that a predetermined ratio between the two fluids is maintained regardless of changes in pressure and flow rate of such first fluid.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: November 6, 2012
    Assignee: International Dispensing Corporation
    Inventor: Mitchell A. Friedman
  • Publication number: 20120275945
    Abstract: A vane cell pump having an over vane pump associated with a first consumer and an under vane pump including an under vane pressure area and an under vane suction area which is connected to the over vane pump. The under vane pressure area is separated from the under vane suction area and is associated with a second consumer.
    Type: Application
    Filed: September 9, 2010
    Publication date: November 1, 2012
    Applicant: ixetic Bad Homburg GmbH
    Inventors: Heiko Schulz-Andres, Christian Böhm
  • Publication number: 20120255445
    Abstract: A double vacuum pump apparatus (Y2) includes positive displacement vacuum pumps (40A, 40B) and lines (52, 60). Each of the vacuum pumps includes a suction port (41) and a discharge port (42), and a pressure detector (80) is provided in the vicinity of the suction port (41) of the double vacuum pump apparatus (Y2). The line (52) connects the discharge port (42) of the vacuum pump (40A) to the suction port (41) of the vacuum pump (40B). The line (60) has an end (E6) and an end (E5) that are connected to the connection line (52), and includes a buffer tube (Z1) and an on-off valve (61) located between the tube (Z1) and the end (E5). A pressure detection signal from the pressure detector (80) is used as an on/off signal for the on-off valve (61).
    Type: Application
    Filed: December 22, 2010
    Publication date: October 11, 2012
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Kazuo Haruna, Kiyokazu Maruta, Hidenori Kuwata, Koichi Shima
  • Publication number: 20120219443
    Abstract: A pumping device and method are described. The pumping device comprises a dry rough vacuum pump equipped with a gas inlet connected to a vacuum chamber, a gas outlet leading to a conduit and an ejector. The pumping method comprises pumping gases contained in the vacuum chamber using the dry rough vacuum pump through the gas inlet, measuring electric power consumed by the dry rough vacuum pump and the pressure of the gases in the conduit, starting the ejector, when the pressure of the gases at the outlet and the electrical power consumed cross respective set point values as they rise and stopping the ejector when the electric power consumed and the pressure of the gases in the conduit at the outlet cross respective set point values as they fall.
    Type: Application
    Filed: October 27, 2010
    Publication date: August 30, 2012
    Applicant: ADIXEN VACUUM PRODUCTS
    Inventor: Thierry Neel
  • Patent number: 8230975
    Abstract: The invention relates to a device for feeding lubricating oil to an internal combustion engine. This device comprises a lubricating oil pump and an oil pressure regulating apparatus. The lubricating oil pump is designed as a reciprocating piston valve pump and the oil pressure regulating apparatus is designed as a multistage oil pressure regulating apparatus.
    Type: Grant
    Filed: February 11, 2006
    Date of Patent: July 31, 2012
    Assignee: Audi AG
    Inventors: Franz Lukas, Volker Verhees, Dieter Böhm
  • Publication number: 20120189478
    Abstract: A vacuum pump system comprises two vacuum pumps which are connected to each other. In order to create vacuum pump system of a more compact size, the connection between the two vacuum pumps is performed via connection elements directly attached to the pump housing and forming connection sites, and the outlet flange of the upper pump is placed directly on the inlet flange of the lower pump without thereby causing a transmission of larger forces or moments.
    Type: Application
    Filed: July 30, 2010
    Publication date: July 26, 2012
    Inventors: Thomas Dreifert, Wolfgang Giebmanns
  • Publication number: 20120189479
    Abstract: A spherical expansion compressor adapted to variable working conditions with a spherical inner chamber, comprises a rolling rotor compressor used as first-stage compression, compression working chambers, expansion working chambers, a gas tank and a pressure control circuit. The pressure control circuit is arranged between the gas tank and a pressure-controlled inlet valve of the rolling rotor compressor, and controls the inlet valve to open/close according to the pressure in the gas tank. When the pressure in the gas tank exceeds a set value, the pressure-controlled inlet valve is closed by the pressure control circuit. When the pressure in the gas tank returns to the set value, the pressure-controlled inlet valve is opened and the rolling rotor compressor works normally. Working medium after first-stage compression enters the gas tank, the pressure in the tank maintains constant through the regulation of the pressure control circuit.
    Type: Application
    Filed: July 30, 2010
    Publication date: July 26, 2012
    Inventors: Luyi Wang, Nan Xia