Miscellaneous Patents (Class 418/270)
  • Patent number: 10941772
    Abstract: A compressor includes a shell assembly and a compression mechanism disposed within the shell assembly. The shell assembly includes first and second end caps. A suction chamber is disposed within the shell assembly between the first end cap and the second end cap. A discharge chamber and oil sump may be disposed within the shell assembly. The shell assembly includes at least one suction opening into the suction chamber. A distributor is in communication with one of the suction openings. Plugs may sealingly engage another one of the suction openings. The distributor includes an inlet path and first and second outlet paths. A suction line is coupled to the inlet path. The suction line includes at least first and second portions. A first plane bisecting the second portion along a length of the second portion is perpendicular to a second plane that bisects the first and second outlet paths.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: March 9, 2021
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: James A. Schaefer, Harry B. Clendenin
  • Patent number: 10738615
    Abstract: A piston is arranged to move in a cylinder to define a variable volume chamber, and can expand in two directions under the influence of pressure in the variable volume chamber to provide sealing against the cylinder. The piston can comprise a primary foot and a secondary foot arranged to move relative to each other in a first direction. The primary foot and the secondary foot can each comprise plural segments arranged to move relative to each other in a second direction. The piston may be suitable for use in an inner rotor, where it forms the end of a projection of the inner rotor and fully exits and reenters the cylinders.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: August 11, 2020
    Assignee: Genesis Advanced Technology Inc.
    Inventor: James Brent Klassen
  • Patent number: 9470230
    Abstract: A refrigerant compressor includes a sealed case, which contains a compression mechanism, a motor part, and an oil reservoir formed in a lower portion. An oil supply pipe links the oil reservoir and a suction side of the compression mechanism and introduces oil in the oil reservoir to the suction side. The amount of oil supply provided to the suction side is adjusted by detecting the rotational speed of the motor part, such that the amount of oil supply provided to the suction side of the oil supply pipe decreases as the rotational speed of the motor part increases.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: October 18, 2016
    Assignee: Johnson Controls-Hitachi Air Conditioning Technology (Hong Kong) Limited
    Inventors: Masaki Koyama, Eiji Sato
  • 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: 9033689
    Abstract: The scroll refrigeration compressor includes a sealed casing, stationary and moving volutes including spiral wraps engaged in one another and defining the variable-volume compression chambers, a delivery chamber defined by the plate of the stationary volute and the sealed casing, a heat shield disposed in the delivery chamber and dividing the delivery chamber into a first volume defined by the plate of the stationary volute and the heat shield and a second volume defined by the heat shield and the sealed casing, and at least one flow passage arranged to communicate the first and second volumes. The compressor further includes at least one bypass passage arranged to communicate the first volume with an intermediate compression chamber, and at least one bypass valve disposed in the first volume and movable between closing and opening positions for closing and opening the corresponding bypass passage.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: May 19, 2015
    Assignee: DANFOSS COMMERCIAL COMPRESSORS
    Inventors: Pierre Ginies, Christophe Ancel
  • Patent number: 9022757
    Abstract: A compressor is provided that includes an accumulator formed in an internal space of a shell to reduce a size of the compressor. An accumulator space may be formed using the shell of the compressor, thereby simplifying an assembly process. A stationary shaft having a refrigerant suction passage may be directly connected to the accumulator to prevent leakage of refrigerant. A discharge passage may be formed in a rotating body to enhance a cooling effect of a drive motor, and an oil separating member may be installed in the discharge passage to prevent oil from being excessively leaked out. A center of gravity of the accumulator may correspond to a center of gravity of the compressor to reduce vibration noise of the compressor caused by the accumulator. An area for installing a compressor including the accumulator may be minimized to enhance design flexibility of an outdoor device.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: May 5, 2015
    Assignee: LG Electronics Inc.
    Inventors: Jinung Shin, Seseok Seol
  • Patent number: 9022759
    Abstract: A compressor including a housing defining a suction pressure region and a discharge pressure region includes first and second scroll members forming compression pockets. A first chamber located on the first end plate of the first scroll member includes first and second passages and a first aperture extending therethrough and in communication with the first chamber. The first aperture provides communication between a compression pocket and the first chamber. A modulation assembly is located in the first chamber and includes a heater and a thermal valve. The valve is displaceable from a first position that isolates the first passage from the second passage and a second position that permits communication between the first and second passages. The valve is displaced as a result of a temperature change provided by the heater.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: May 5, 2015
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Sunil Annappa Magadum, Vinayak Madanrao Juge
  • Patent number: 9017050
    Abstract: The scroll refrigeration compressor includes a stationary volute and a moving volute provided with spiral wraps defining variable-volume compression chambers, a separating member sealably mounted on a plate of the stationary volute so as to allow a relative movement between the separating member and the stationary volute, a delivery chamber at least partially defined by the separating member and the sealed casing. The compressor further includes a bypass passage arranged to communicate the delivery chamber with an intermediate compression chamber, and a anti-return device comprising a closing member movable between closing and opening positions for closing and opening the bypass passage, and an enclosure, positioned between the separating member and the plate of the stationary volute, including a first portion sealably mounted in a housing defined by the separating member and oriented substantially parallel to the longitudinal axis of the compressor.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: April 28, 2015
    Assignee: Danfoss Commercial Compressors
    Inventors: Pierre Ginies, Mickael Bron, Dominique Gross, Stephane Watts, Franck Meynand
  • Patent number: 9011124
    Abstract: An enclosed positive displacement mechanism including a body with an inlet and an outlet; a rotor mounted in the body and rotatable about a main axis; an orbiting piston located in the cavity, rotatable about an eccentric secondary axis and arranged to orbit around the main axis to roll on the internal side surface of the cavity; and a vane located in the cavity, slidable in the piston and mounted in the body between one inlet and one outlet so as to oscillate. The orbiting piston and the vane divide in cyclic manner the cavity into a first and a second chamber with variable volume, which are mutually complementary and communicate with the inlet and the outlet. During a portion of its oscillation, the vane passes through the piston and is in contact with the side surface of the cavity, thereby separating the chambers in a fluid-tight manner.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: April 21, 2015
    Assignee: VHIT S.p.A.
    Inventor: Leonardo Cadeddu
  • Patent number: 9011121
    Abstract: A device that enhances compressor efficiency by reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed by 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 communication port flow guide is provided so as to cover a predetermined area of an opening of a communication port from a side of a flow path in a reverse direction out of two flow paths in different directions around the drive shaft from a discharge port through which is discharged the refrigerant compressed by a low-stage compression unit to the communication port through which the refrigerant flows out. The communication port flow guide transforms a direction of a flow into a direction of a connecting flow path.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: April 21, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuhide Yokoyama, Raito Kawamura, Kei Sasaki, Shin Sekiya, Taro Kato, Masao Tani, Atsuyoshi Fukaya, Takeshi Fushiki
  • Patent number: 8992191
    Abstract: A scroll compressor is provided that may include a differential pressure hole formed at or in an orbiting scroll that communicates a high pressure part with an intermediate pressure part, a decompression portion formed in the differential pressure hole and having a pin member inserted therein to decompress oil. An inner diameter D1 of the decompression portion may be greater than an outer diameter D2 of the pin member. The decompression portion may include an inlet through which oil may be introduced from the high pressure part into the differential pressure hole, and an outlet through which oil from the differential pressure hole may be discharged into the intermediate pressure part.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: March 31, 2015
    Assignee: LG Electronics Inc.
    Inventors: Sungyong Ahn, Seheon Choi, Byoungchan Kim, Byeongchul Lee
  • Patent number: 8979517
    Abstract: A rotary compressor, used e.g. in an air conditioner, includes a compressing unit having an end plate that closes an end portion of an annular cylinder. The end plate includes a groove portion accommodating a discharge valve portion having a reed valve type discharge valve and a discharge-valve limiter. The discharge valve portion is attached to the groove portion with a rivet. The groove portion has a rivet-side enlarged diameter portion formed into a semicircular step shape, and a diameter of the rivet-side enlarged diameter portion other than a bottom side thereof is larger than a diameter of the bottom side. This prevents a punch P that swages the rivet from interfering with the groove portion when attaching the discharge valve portion to the groove portion with the rivet.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: March 17, 2015
    Assignee: Fujitsu General Limited
    Inventors: Takayuki Omura, Taku Morishita
  • Patent number: 8944788
    Abstract: Methods for controlling the net-displacement of a rotary fluid pressure device are disclosed. One of the net-displacement control methods (47) includes obtaining a desired input parameter (23) and a relative position (21) of a first member (43) and a second member (35) of a fluid displacement mechanism. A determination of a first and second output value is then made for each of a plurality of volume chambers (45) when the volume chambers (45) are supplied with fluid at fluid inlet and fluid outlet conditions, respectively. A total output value is then computed for each of a plurality of control valve configurations (63) and compared to the desired input parameter (23). The control valve configuration (63) with the total output value most similar to the desired input parameter (23) is then selected. A plurality of control valves (15) are then actuated in accordance with the selected control valve configuration (63).
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: February 3, 2015
    Assignee: Eaton Corporation
    Inventors: Brian Armstrong, Qinghui Yuan
  • Patent number: 8944791
    Abstract: A compressor assembly for compressing a working fluid and lubricated with an oil, including a housing having a suction plenum and a discharge plenum that defines a discharge chamber and an exhaust chamber in fluid communication through a discharge chamber outlet, and a compression mechanism disposed in the housing. A baffle member proximate the discharge chamber outlet and against which a compressed admixture of working fluid and oil expelled from the discharge chamber is impactable for separating oil from the impacting admixture. The baffle member has an oil-impingement surface for collecting oil separated from the impacting admixture and directing the flow of oil separated from the impacting admixture. Working fluid substantially at a discharge pressure and devoid of the oil collected on the oil-impingement surface is exhaustible from the exhaust chamber through the discharge port.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: February 3, 2015
    Assignee: Delphi Technologies, Inc.
    Inventors: Scott F. Stone, John F. Quesada, Ronald J. Vincent
  • Patent number: 8932036
    Abstract: A compressor may include a shell, first and second scroll members, and a seal assembly. The shell defines a first and second pressure regions. The first scroll member may include a first end plate defining a chamber. The seal assembly may surround the discharge passage and fluidly separate the first and second pressure regions from each other. The seal assembly may include first and second sealing members. The first sealing member may prevent communication between the chamber and the second pressure region when a first fluid pressure within the second pressure region is higher than a second fluid pressure within the chamber. The first sealing member may define a leakage path when the first fluid pressure is lower than the second fluid pressure. The second sealing member may fluidly separate the chamber and the second pressure region when the first fluid pressure is lower than the second fluid pressure.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: January 13, 2015
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Kenneth J. Monnier, Dennis D. Pax, Roy J. Doepker
  • Patent number: 8905734
    Abstract: A compressor is provided having an accumulator that may form an accumulating chamber at an internal space of a shell, thereby reducing a size of the compressor, and simplifying an assembly process. A stationary shaft having a refrigerant suction passage may be directly connected to the accumulator to prevent leakage of refrigerant. Further, a center of gravity of the accumulator may correspond to a center of gravity of the compressor to reduce vibration noise of the compressor caused by the accumulator. Furthermore, an oil collecting plate may be installed at an upper end of an upper bearing to supply oil between a vein and vein slot, thereby preventing compression loss. Also, an installation area of the compressor including the accumulator may be minimized to enhance design flexibility of an outdoor device employing the compressor and minimize interference with other components, thereby facilitating installation of the outdoor device.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: December 9, 2014
    Assignee: LG Electronics Inc.
    Inventors: Jinung Shin, Seseok Seol
  • Patent number: 8894395
    Abstract: A front housing configuring a scroll compressor is provided in its shaft hole with a first bearing, and the front housing rotatably supports a rotation shaft. The first bearing includes a ball bearing having a plurality of balls. First and second seal rings and are provided between an outer ring fixed to the front housing and an inner ring which abuts against an outer peripheral surface of the rotation shaft. A first seal ring disposed on the side of one side surface of the outer ring is provided such that the first seal ring is in non-contact with the inner ring, and the second seal ring disposed on the side of the other side surface of the outer ring abuts against the inner ring.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: November 25, 2014
    Assignee: Keihin Corporation
    Inventors: Yusuke Nishimura, Kazuaki Higuchi, Satsuki Muraoka, Hiroki Kuwata
  • Patent number: 8876505
    Abstract: Rotor for a screw compressor includes a rotor body (2) and a shaft (6), whereby said shaft extends at least with a part into or through a central or approximately central axial bored hole or passage (5) in the rotor body (2). The shaft (6) has a stretch element (7), whereby the rotor body (2) or at least a part thereof is held on the shaft (6) by means of tension elements (11 and 12) which are locked or can be locked axially with respect to the shaft and which are connected with each other by means of the stretch element (7).
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: November 4, 2014
    Assignee: Atlas Copco Airpower
    Inventors: Johan Nachtergaele, Richard Andre Maria De Bock, Simon Peter G. De Bock
  • Patent number: 8870557
    Abstract: The present invention discloses a rotor for hydraulic motor comprising a plurality of vanes spacedly apart inserted into a plurality of vane slots formed on the rotor respectively, at least one groove is provided in outer edge of the rotor between the neighboring vanes, and extending inside along the axial direction of the rotor. wherein the groove has a first inner side and a opposite second inner side, and the first inner side of the groove is comb teeth-shaped. The rotor and the hydraulic motor using the rotor according to the present invention increases force bearing area by providing grooves on the rotor, so as to increase power output, lower the manufacturing cost, reduce the moment of inertia, and improve the starting speed and rotating speed.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: October 28, 2014
    Inventor: Kin Wa Chan
  • Patent number: 8864480
    Abstract: An oil recovery member, a motor mechanism, and a compressor using the same are provided. The oil recovery member is provided to prevent oil rising along a rotational shaft from being discharged with refrigerant, and relative sizes, such as installation positions between the oil recovery member and components adjacent thereto, are restricted. As the oil flow is guided through a passage defined between the oil recovery member and the adjacent components, the oil may be efficiently recovered, so that, an oil circulation rate of a freezing cycle may be reduced and compression efficiency improved.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: October 21, 2014
    Assignee: LG Electronics Inc.
    Inventors: Hae-Ok Jung, Jae-Yeol Lee, Yong-Beom Yeom
  • Patent number: 8858204
    Abstract: A vacuum pump includes a pumping stage, a rotary shaft supported by a lubricated support bearing; a lubricant deflector mounted between the lubricated support bearing and a ring seal which is mounted on the rotary shaft between the lubricant deflector and the pumping stage, a first reservoir containing a first reserve of liquid lubricant and in communication with the lubricated support bearing in a first volume, a lubricant splashing unit mounted on the rotary shaft in the first reservoir and having one end bathed in the first reserve of lubricant. A second reservoir includes a second reserve of liquid lubricant separated from the first reservoir by a separation wall having an aperture through which the first and second reserves of lubricant communicate. A lubricant return channel having one inlet facing the lubricant deflector opens into the second volume of the second reservoir above the second reserve of lubricant.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: October 14, 2014
    Assignee: Adixen Vacuum Products
    Inventor: Stephane Crochet
  • Patent number: 8840384
    Abstract: At least one bypass opening is formed in a base of a scroll member, and communicates with at least one compression chamber. The bypass opening communicates with a passage leading to a suction pressure chamber within a compressor shell. A valve includes an element electrically powered to move between a first position at which it blocks flow of refrigerant from the bypass port to the passage leading to the suction pressure chamber, and a second position at which it allows flow of refrigerant between the bypass port and the passage leading to the suction pressure chamber. A portion of the valve, which is electrically powered, is mounted outside of the compressor shell.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: September 23, 2014
    Assignee: Danfoss Scroll Technologies, LLC
    Inventors: Tapesh P. Patel, Gene Fields, Joe T. Hill, Tracy L. Milliff, Harshal Upadhye, Behzad Parastar, Ole Holst Christensen
  • Patent number: 8820082
    Abstract: A screw expander system has a condenser positioned for receiving a mixture of oil and operating medium from a screw expander. A pump pressure-feeds the mixture from the condenser to an evaporator where the operating medium is evaporated. An oil separating tank separates the mixture from the evaporator into the gaseous operating medium and the oil, and the operating medium is returned to the screw expander via a throttle mechanism. The oil can thereby be supplied to the screw expander without providing a separate oil pump, as a result of which the screw expander system is compact.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: September 2, 2014
    Assignee: Kobe Steel, Ltd.
    Inventor: Shoji Yoshimura
  • Patent number: 8821143
    Abstract: In a vane rotary compressor, a discharge valve on a discharge flow channel communicates an operating chamber in a compression element with a discharge hole. The discharge valve is pushed from an opening portion of a discharge valve groove to an outer circumferential surface of a roller by a high-pressure refrigerant when pressure in an operating chamber is lower than the pressure of the high-pressure refrigerant. The discharge valve is pushed back into the discharge valve groove by the refrigerant pressure in the operating chamber when the pressure in the operating chamber is higher than the pressure of the high-pressure refrigerant. The discharge flow channel is closed by the outer circumferential surface of the discharge valve pushed out from the opening portion of the discharge valve groove and the outer circumferential surface of the roller, and opens when the discharge valve is pushed back into the discharge valve groove.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: September 2, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinichi Takahashi, Hideaki Maeyama, Shin Sekiya, Tatsuya Sasaki, Raito Kawamura, Kanichirou Sugiura
  • Patent number: 8794941
    Abstract: A positive displacement compressor designed for near isothermal compression. A rotor includes a curved sealing portion that coincides with a in an interior rotor casing wall. Liquid injectors provide cooling liquid. A gate moves within the compression chamber to either make contact with or be proximate to the rotor as it turns. Gate positioning systems position the gate in this manner, taking into account the shape of the rotor. Outlet valves allow for expulsion of liquids and compressed gas. The unique geometry and relationship between the parts provides for efficiencies and higher pressures not previously found in existing compressor designs.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: August 5, 2014
    Assignee: Oscomp Systems Inc.
    Inventors: Pedro Santos, Jeremy Pitts, Andrew Nelson, Johannes Santen, John Walton, Mitchell Westwood, Harrison O'Hanley
  • Patent number: 8794940
    Abstract: This compressor comprises first and second volutes describing an orbital relative movement and each comprising a plate from which a spiral extends, the two spirals being engaged one inside the other and defining pairs of compression chambers of variable volume. The compressor has a housing formed in that surface of the plate of the first volute which is turned towards the spirals, which housing opens into one of the compression chambers, refrigerant delivery means leading into the housing, and a nonreturn device being mounted in the housing, the nonreturn device preventing communication between the delivery means and the compression chamber into which housing opens in a first or closed position, and allowing communication between the delivery means and said compression chamber in a second or open position.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: August 5, 2014
    Assignee: Danfoss Commercial Compressors
    Inventors: Christophe Ancel, Pierre Ginies, Pierre Emilien Clement
  • Patent number: 8790098
    Abstract: A compressor includes a housing, a first scroll member, a second scroll member and a valve assembly. The first scroll member is positioned within the housing and includes a first end plate portion and a second end plate portion coupled to the first end plate portion and having a first spiral wrap extending therefrom. The first end plate portion and the second end plate portion define a discharge passage. The second scroll member is positioned within the housing and includes a second spiral wrap meshingly engaged with the first spiral wrap. The valve assembly is supported by at least one of the first end plate portion and the second end plate portion at a location radially outward from the discharge passage.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: July 29, 2014
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Masao Akei, Michael M. Perevozchikov
  • 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
  • Patent number: 8747091
    Abstract: A water injection type screw compressor wherein gas sucked from an intake flow is supplied to a rotor chamber, compressed and discharged into a discharge channel as compressed fluid together with water supplied to the rotor chamber, comprises a water separator disposed in the discharge channel to separate water and gas from compressed fluid, a water channel connecting the water separator to a compressor main body for supplying the rotor chamber with the water separated in the water separator, and an oil circulation channel including an oil pump, an oil filter, and a housing for storing oil for supplying the oil to where lubrication is needed. Further, a part of the water channel is arranged passing through an oil trap formed at the bottom inside the housing for storing oil. Thus, oil temperature increases can be minimized in simplified structure having no oil cooling means such as an oil cooler.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: June 10, 2014
    Assignee: Kobe Steel, Ltd.
    Inventor: Toru Noguchi
  • Patent number: 8721309
    Abstract: An airtight compressor includes a compression mechanism disposed inside an airtight container in a position below a gas retention space. An oil supply passage supplies oil from an oil reservoir both to the gas retention space (14) and to a sliding portion of the compression mechanism in a compression space. The oil supply passage communicates the gas retention space with a second space located on an opposite side of the piston from the intake chamber. A second channel is a channel that is different from the oil supply passage. The second channel enables a gas medium to flow from the gas retention space to the second space. Preferably, passage resistance when the gas medium flows through the second channel is less than when the gas medium flows through the oil supply passage.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: May 13, 2014
    Assignee: Daikin Industries, Ltd.
    Inventor: Masanori Masuda
  • Patent number: 8690556
    Abstract: There is disclosed a rotary compressor which delays a pressure rise on a high pressure chamber side in a cylinder of a rotary compression element to decrease a high pressure load applied to a roller and a rotary shaft, thereby improving performance. In the rotary compressor including a sealed container in which an electromotive element (a driving element) and first and second rotary compression elements driven by a rotary shaft of the electromotive element are included, each of the rotary compression elements being constituted of a cylinder, a roller fitted into an eccentric portion formed on the rotary shaft to eccentrically rotate in the cylinder, and a vane which abuts on the roller to partition the inside of the cylinder into a low pressure chamber side and a high pressure chamber side, the inner diameter of a suction passage formed in each cylinder is 59% or more and 70% or less of the thickness of the cylinder.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: April 8, 2014
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Hiroyuki Yoshida, Takayasu Saito, Yoshiaki Hiruma, Takahiro Nishikawa, Masayuki Hara
  • Patent number: 8684713
    Abstract: A rotor type pump is provided. A rotor rotates and closely contacts an inner surface of a chamber, and a cam controls a sealing part, so that during a compression procedure, the sealing part, a convex surface of the rotor, and an inner surface of the chamber form a substantially hermetic space, and when a gas in the chamber is compressed to a set pressure, the compressed gas is guided out. Therefore, a smooth surface of the rotor closely contacts the inner surface of the chamber, and the gas in the chamber is compressed in a rotational manner, in which the to-and-fro movement of a piston is not required, and a dead point is prevented, so that operation is smooth and noise is not easily generated. Further, the rotor type pump does not need to use a lubricating fluid and offers extremely large compression capacity and excellent efficiency.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: April 1, 2014
    Inventor: Pang-Chian Lio
  • Patent number: 8672659
    Abstract: A vane air motor is disclosed which is configured to prevent grease in a radial bearing from leaking into a rotor chamber. The vane air motor has a motor housing (20) having a rotor chamber, a rotor (22) with vanes (24) disposed in the rotor chamber, a first end wall (16) of the motor housing equipped with a radial bearing (50) rotatably supporting a support shaft portion (28) of the rotor, and a casing contiguously joined to the motor housing to form a compressed air supply chamber (44) together with the first end wall to supply compressed air into the rotor chamber through an air supply hole (46) formed in the first end wall. The first end wall has communication means (16-5, 16-6 and 16-7) for supplying compressed air from the compressed air supply chamber to the side of the first radial bearing closer to the rotor.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: March 18, 2014
    Assignee: Nitto Kohki Co., Ltd.
    Inventor: Takashi Nakajoh
  • Patent number: 8668478
    Abstract: A scroll compressor includes a discharge valve assembly having a valve member, a valve stop supported within the compressor shell and including an aperture there through and a communication member. The communication member defines a fluid passage extending into the discharge chamber from the valve stop toward the first discharge outlet in the discharge chamber and provides fluid communication between the aperture in the valve stop and a location downstream of the valve stop. A first side of the valve member abuts the valve stop when in an open position and the valve stop provides communication between the first side of the valve member and the communication member via the aperture.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: March 11, 2014
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Xiaogeng Su, Weihua Guo, Hanqing Zhu, Xiaomin Qu
  • Patent number: 8647084
    Abstract: In a cylinder dividing mechanism of a pneumatic tool, the first and second air pressure driving spaces are formed in the chamber, the first and second external channels are set externally on the circumferential wall, the first external channel is connected with the first air intake and air intake/exhaust dividing controller, and the second external channel is connected with the second air intake and air intake/exhaust dividing controller. As such, a single chamber is provided with two air pressure driving spaces for synchronous compression and driving of the rotor. The driving torsion for the pneumatic tool could be multiplied without need of increasing the volume of the chamber of the cylinder to cater for the need of the users with improved applicability.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: February 11, 2014
    Assignee: Sing Hua Industrial Co., Ltd.
    Inventor: Ching-Shun Chang
  • Patent number: 8622725
    Abstract: A screw compressor includes a pair of rotors housed in a rotor chamber. A gas sucked from an intake channel is compressed by the screw rotors and discharged from a discharge channel. A columnar space having a functional end face with an opening into an intermediate pressure section, which is an empty space in the rotor chamber and isolatable from both the intake channel and the discharge channel by the screw rotors. The functional end face has an opening into a bypass channel in communication with the discharge channel. A piston, inserted in the columnar space and brought into contact with the functional end face, separates the intermediate pressure section from the bypass channel when the piston contacts the functional end face. A pressure detection channel allows an area located on an opposite side of the functional end face in the columnar space to communicate with the discharge channel.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: January 7, 2014
    Assignee: Kobe Steel, Ltd.
    Inventor: Noboru Tsuboi
  • Patent number: 8602759
    Abstract: A screw vacuum pump, in particular for compression against atmospheric pressure, comprises a pump housing defining a suction chamber. Two meshing screw rotors are arranged in the suction chamber. Further, an overpressure outlet provided, which comprises an overpressure opening in a side wall of the suction chamber. Further, an overpressure valve is arranged in the overpressure outlet. The width (b) of the overpressure opening in the longitudinal direction of the screw rotors is smaller than or equal to a tooth width (B) of the screw rotors.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: December 10, 2013
    Assignee: Oerlikon Leybold Vaccum GmbH
    Inventors: Peter Birch, Robert Jenkins, Roland Müller, Magnus Janicki, Wolfgang Giebmanns
  • Patent number: 8597004
    Abstract: A scroll type compressor including a fixed scroll, a movable scroll engaged with the fixed scroll and a hermetically sealed container, one of the fixed scroll and the movable scroll including an intercommunication path having a lower hole opened to the outside of the one scroll and an insertion hole formed by subjecting the lower hole to reaming processing from the one end to a position of a predetermined depth of the lower hole, a pin member that is slightly smaller in diameter than the intercommunication path and movably inserted in the intercommunication path, and a screw member that is provided at one end of the intercommunication path to close the one end of the intercommunication path so as to press the pin member against the end of the back side of the intercommunication path.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: December 3, 2013
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yasunori Kiyokawa, Tsutomu Kon, Katsuki Akuzawa, Kazuyoshi Sugimoto
  • Patent number: 8585382
    Abstract: A compressor includes a shell assembly, first and second scroll members and a capacity modulation assembly. The first and second scroll members form a series of pockets. A first modulation port defined in the first scroll member is in communication with a first pocket. The capacity modulation assembly is in communication with the first modulation port and is operable in full, partial and first and second pulse width modulation (PWM) capacity modes. The full capacity mode includes the first modulation port isolated from a suction pressure region of the compressor, the partial capacity mode includes the first modulation port in communication with the suction pressure region, the first PWM capacity mode includes a capacity between full and partial capacity via PWM between the full and partial capacity modes and the second PWM capacity mode includes a capacity between full and zero capacity by providing PWM of the capacity modulation assembly.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: November 19, 2013
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Masao Akei, Roy J. Doepker
  • Patent number: 8585381
    Abstract: A scroll type compressor including a fixed scroll, a movable scroll engaged with the fixed scroll, and a hermetically sealed container in which the fixed scroll and the movable scroll are mounted. The fixed scroll or the movable scroll has an intercommunication path for lubricating oil that is opened to the outside of the one scroll at one end thereof, extends radially inside the scroll and has a high-pressure opening intercommunicating with a high-pressure portion of the container and a low-pressure opening intercommunicating with a low-pressure portion in the scroll, a pin member disposed in the intercommunication path so as to be movable radially in the scroll, a screw member closing one end of the intercommunication path, and a stopper provided at a predetermined position in the intercommunication path to regulate radial movement of the pin member.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: November 19, 2013
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yasunori Kiyokawa, Yoshiaki Koike, Tsutomu Kon, Katsuki Akuzawa, Satoshi Iitsuka, Kenji Aida, Akihiro Hayashi, Kazuyoshi Sugimoto
  • Patent number: 8579614
    Abstract: A scroll compressor has a housing enclosing a compressor pump unit which includes an orbiting scroll member and a non-orbiting scroll member. Each of the orbiting and non-orbiting scroll members include a base and a generally spiral wrap extending from the base. The wraps interfit to define compression chambers, with a central-most discharge pressure chamber, and circumferentially spaced intermediate pressure chambers being defined. The base of the non-orbiting scroll includes ports associated with the intermediate pressure chambers. At least one port is associated with the discharge pressure chamber. Valves are associated with each of the ports. A discharge plenum is defined downstream of the ports and valves within the housing. A back pressure chamber is defined behind the base of one of the orbiting and non-orbiting scroll members, and taps a refrigerant from the discharge pressure chamber.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: November 12, 2013
    Assignee: Danfoss Scroll Technologies LLC
    Inventor: Zlll Sun
  • Patent number: 8556606
    Abstract: A screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft located on the high pressure side, and in this order from the rotor chamber side. It includes a pressurized communicating channel for introducing high-pressure target gas into a pressurized space formed between the first and second non-contact seals, a pressurized pressure detecting device for detecting the pressure of the pressurized space, and an alarm device for generating an alarm when a value detected by the pressurized pressure detecting device falls out of a predefined range of pressurized pressures. The screw fluid machine is capable of detecting or predicting a condition of the shaft sealing device and accurately and reliably reporting the detected condition to an operator.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: October 15, 2013
    Assignee: Kobe Steel, Ltd.
    Inventor: Toru Noguchi
  • Patent number: 8556922
    Abstract: A surgical instrument is provided for cutting bone and other tissue. The surgical instrument is powered by a pressurized fluid and includes a rotatable shaft connected to a dissection tool. The instrument includes a housing member comprising a one-piece base. A rotor housing chamber is defined by the base, and the rotatable shaft is located in the rotor housing chamber. A first bearing housing is defined by the base, located adjacent the rotor housing chamber, and houses a first bearing that engages the rotatable shaft. A second bearing housing is defined by the base, located on an opposite side of the rotor housing chamber from the first bearing housing, and houses a second bearing that engages the rotatable shaft. A passage is defined by the base and operable to direct a pressurized fluid through the base to the rotor housing chamber in order to rotate the rotatable shaft.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: October 15, 2013
    Assignee: Medtronic PS Medical, Inc.
    Inventors: Durrell Tidwell, Jonathan Morris, Gabriel A. Johnston
  • Patent number: 8556603
    Abstract: A progressing cavity pump adapted for pumping of compressible fluids may include an inner rotor having a number of thread-starts together with an adapted stator or outer rotor provided with one extra thread-start. A number of closed pump cavities are formed which are moved, during fluid conveyance, from the inlet side of the pump to the outlet side of the pump, at which position they become open outlet cavities exposed to the fluid pressure in a downstream pipeline. At least one passage is disposed between the outlet side and the closed pump cavity defined closest to the outlet side. The passage is structured for intentional fluid back-flow from the outlet side in a measured and approximately constant volume.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: October 15, 2013
    Assignee: AGR Subsea AS
    Inventor: Sigurd Ree
  • Patent number: 8535028
    Abstract: A downhole positive displacement motor converts hydraulic fluid pressure into rotational torque. The motor includes a non-helical rotor and stator, and upper and lower valve assemblies each comprising cylindrical rotating and stationary elements which define longitudinal passages. The timing of alignment of the passages creates pressure in power pockets in the stator, rotating the rotor. The rotational torque can be used in any application that may require mechanical force to operate or drive a mechanism created for oil, gas, or water production in a down hole application.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: September 17, 2013
    Assignee: Cansonics Inc.
    Inventor: William Emil Groves
  • Patent number: 8529234
    Abstract: A water-lubrication type screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft. The bearing is located on the high pressure side and in this order from the rotor chamber side. the bearing includes a low pressure communicating channel for allowing an outflow space formed on the rotor chamber side with respect to the first non-contact seal to communicate with a low pressure channel for the target gas communicating with a low pressure space inside the rotor chamber or the rotor chamber, a pressurized communicating channel for introducing high-pressure target gas into a pressurized space formed between the first and second non-contact seals, and an open communicating channel through which an open space formed between the second non-contact seal and the lip seal opens to the outside of the casing.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: September 10, 2013
    Assignee: Kobe Steel, Ltd.
    Inventors: Shoji Yoshimura, Toru Noguchi
  • Patent number: 8529235
    Abstract: An oscillating variable displacement ring pump provides both positive and variable displacement. A housing circumscribes a pump chamber. The pump chamber encases an oscillating ring driven by a crank assembly. The ring encircles an end of the crank assembly. The crank assembly includes an annular spacer that rolls inside the ring. When the pump chamber is sealed, rotation of the crank assembly causes ring oscillation in the chamber. Ring oscillation creates vacuum pressure, which draws substances into pump chamber via an inlet port while pumping out substances of the pump chamber via an outlet port. A valve within the pump chamber contacts the ring and follows ring oscillation to help separate incoming substances from outgoing substances. The pump can include an adjustable internal by-pass means to control the volume and pressure of substances delivered by the pump.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: September 10, 2013
    Inventor: Ronald Szepesy
  • Patent number: 8517702
    Abstract: A rotary compressor is provided, in which an inner diameter of a connection hole connected to a vane chamber and an outer diameter of a connection tube inserted into the connection hole are designated so that the connection tube can closely be adhered to the connection hole, thereby preventing a refrigerant from being leaked out between the connection hole and the connection tube so as to allow a fast and accurate mode switching of the vane, resulting in improvement of the performance of the compressor and prevention of noise caused by vibration of the vane.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: August 27, 2013
    Assignee: LG Electronics Inc.
    Inventors: Sang-Myung Byun, Sang-Mo Kim
  • Patent number: 8512019
    Abstract: In a screw compression apparatus in which shaft sealing members (13, 14) isolate a bearing space (7, 8) from a rotor chamber (5) and a lubricating fluid separating collector (3) separates the rotor lubricating fluid from the target gas discharged by the screw compressor (2), rotor lubricating fluid separated by the lubricating fluid separating collector (3) is introduced into the rotor chamber (5) via a rotor lubricating flow channel (25), and a bearing lubricating system (17) supplies a bearing lubricating fluid to the bearing space (7, 8). The bearing lubricating fluid flowing out from the bearing space (7, 8) is cooled and returned to the bearing space (7,8). A part of the target gas may be supplied to the shaft sealing members (13, 14) at a location between carbon rings of the shaft sealing members.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: August 20, 2013
    Assignee: Kobe Steel, Ltd.
    Inventors: Tetsuya Kakiuchi, Yasushi Amano
  • Patent number: 8475148
    Abstract: There is disclosed a scroll compressor which can lower the noise level of a harsh frequency without taking a lot of troubles. In a sealed container, a scroll compression element and an electromotive element are provided. The scroll compression element is constituted of a fixed scroll including a vertically provided spiral lap, and a swingable scroll including a vertically provided spiral lap and swiveled by a rotary shaft of the electromotive element with respect to the fixed scroll. A refrigerant compressed by gradually reducing, from the outside to the inside, a plurality of compression spaces formed by engaging both the laps with each other is discharged to a discharge pressure space in the sealed container.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: July 2, 2013
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Satoshi Iitsuka, Kazuyoshi Sugimoto