Adjustable Or Resiliently Biased Working Member Patents (Class 418/57)
  • Patent number: 9581197
    Abstract: A bearing including: an inner race; an outer race arranged to rotate freely relative to the inner race by a first plurality of rolling elements and including a circumferentially disposed channel arranged on a first radially outermost surface of the outer race; a cage located in the circumferentially disposed channel and including a first plurality of apertures; and a second plurality of rolling elements disposed in the first plurality of apertures.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: February 28, 2017
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: William Moratz
  • Patent number: 9551341
    Abstract: A scroll type fluid machine, for improving a dimensional accuracy with easy working, includes a fixed scroll, an orbiting scroll arranged so as to oppose to the fixed scroll and executing an orbiting motion, a driving shaft driving the orbiting scroll, an eccentric shaft decentered from the driving shaft and connected to the orbiting scroll, and an eccentric bush connecting the driving shaft and the eccentric shaft to each other, in which the eccentric bush includes a main hole into which the driving shaft is fitted and an eccentric hole into which the eccentric shaft is fitted, and the eccentric hole is decentered with respect to the main hole.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: January 24, 2017
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Yoshiyuki Kanemoto, Atsushi Kanaizumi
  • Patent number: 9291165
    Abstract: A scroll-type compressor for a CO2 vehicle air conditioning system, having a mechanical drive which is connected by a drive shaft to an eccentric bearing. A movable displacement spiral is rotatably connected to the eccentric bearing and engages into a counterpart spiral such that, between the displacement spiral and the counterpart spiral, radially inwardly traveling chambers are formed in order to compress the refrigerant and discharge it into a pressure chamber. Wherein the counterpart spiral is movable in alternating fashion relative to the displacement spiral in an axial direction, wherein, between the counterpart spiral and the displacement spiral, there is arranged at least one spring for exerting an axial release force on the counterpart spiral, and at least one piston engages on the counterpart spiral, in order to exert an axial closing force on the latter, adjacent to the pressure chamber in an off-center position.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: March 22, 2016
    Assignee: OBRIST ENGINEERING GMBH
    Inventors: Frank Obrist, Oliver Obrist, Christian Schmaelzle, Christian Busch
  • Patent number: 9206802
    Abstract: A rotatable drive shaft in the swash pump or turbine for liquids is supported by one bearing at each end. An integrated motor or dynamo uses the same two bearings. The compound first bearing supports a slanted section of the drive shaft placed inside the inner swash sphere, and transfers rotational power to the attached nutatable swash plate. The second bearing confines rotation of the drive shaft in a defined axis. Either one of the bearings is made to prevent axial movement of the drive shaft, preventing swash pump misalignment. A resilient drive, and an immersed pump are described.
    Type: Grant
    Filed: April 24, 2010
    Date of Patent: December 8, 2015
    Assignee: SWASHPUMP TECHNOLOGIES LIMITED
    Inventors: Lindsay Bruce Dalziel, John Layne, Benno Frank Smit
  • 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: 9022758
    Abstract: A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing as well as a method of operation thereof is provided. The housing is separated into different chambers by a separator. One of the scroll bodies is sealed to the separator with a floating seal arrangement including a seal interface between a floating seal of the floating seal arrangement and a hub of a fixed scroll compressor body. A seal retaining ring prevents axial motion of a seal member of the seal interface during start-up operations due to pressure imbalances across the seal member.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: May 5, 2015
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: Johnathan P. Roof, Ronald J. Duppert
  • 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: 9004887
    Abstract: A thrust plate for a compressor may include first and second ends and a feed hole. The first end may include a thrust surface. The second end may include a lubricant accumulation feature. The feed hole may extend between the lubricant accumulation feature and the thrust surface to provide communication therebetween. The feed hole may be angled relative to a longitudinal axis of the thrust plate such that lubricant flows through the feed hole from the lubricant accumulation feature to the thrust surface.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: April 14, 2015
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Linzhi Chao, Shuichong Fan, Chao Jiang
  • Patent number: 8998596
    Abstract: A scroll compressor includes a pressing mechanism and a back-flow prevention mechanism. The pressing mechanism includes a back-pressure chamber facing a back surface of a movable-scroll end plate, and a back-pressure supply path arranged to allow the back-pressure chamber to communicate with a compression chamber which is in a state right before the compression chamber communicates with an outlet port or a state in which the compression chamber communicates with the outlet port. The back-flow prevention mechanism allows refrigerant of the back-pressure supply path to flow from the compression chamber to the back-pressure chamber, and prevents fluid of the back-pressure supply path from returning from the back-pressure chamber to the compression chamber.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: April 7, 2015
    Assignee: Daikin Industries, Ltd.
    Inventors: Kenji Nagahara, Youhei Nishide, Nobuhiro Nojima, Yoshinobu Yosuke, Takashi Uekawa, Masanori Masuda
  • Publication number: 20150093277
    Abstract: A submersible pump assembly for use in a borehole, including a screw pump and/or an eccentric screw pump with a longitudinal axis. The submersible assembly further includes a drive and a bearing arrangement for taking up and diverting the axial and/or radial forces arising during the operation of the screw pump andor eccentric screw pump. The drive is disposed, via a first coupling rod, at one end of the screw pump and/or eccentric screw pump and the bearing arrangement is assigned, via a second coupling rod, to the opposite end of the screw pump and/or eccentric screw pump along the longitudinal axis.
    Type: Application
    Filed: October 1, 2014
    Publication date: April 2, 2015
    Inventors: Klaus Heizinger, Arthur Zinke, Eudes Borchardt
  • 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: 8967987
    Abstract: A scroll compressor is provided, in which at least one bypass hole that bypass a portion of a refrigerant before the refrigerant is discharged through a discharge hole is formed at a position where a bypass section that bypasses the refrigerant through the at least one bypass hole overlaps a discharge section that discharges the refrigerant through the discharge hole. The at least one bypass hole is formed at a position where a wrap volume ratio (Vs/Vd), which is a ratio of a suction volume (Vs) with respect to a discharge volume (Vd) in a compression chamber, is within the range of about 1.8˜2.2. With this configuration, over-compression of refrigerant may be prevented in a low speed driving mode, and efficiency of the compressor may be enhanced in the low speed driving mode and under a low load condition.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: March 3, 2015
    Assignee: LG Electronics Inc.
    Inventors: Junghoon Park, Sungsoon Jang, Jeonghun Kim, Nara Han
  • 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: 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: 8827667
    Abstract: A scroll compressor including a casing, a scroll compression mechanism that compresses refrigerant, a driving motor that has a driving shaft and is connected to the scroll compression mechanism through the driving shaft to drive the scroll compression mechanism, a main frame that supports the scroll compression mechanism in the casing, a bearing plate that supports the driving shaft of the driving motor in the casing and has an opening portion through which upper and lower spaces above and below the bearing plate intercommunicate with each other, and a first cover that covers the surrounding of the driving shaft between the driving motor and the bearing plate, wherein the cover is configured so as to be passable through the opening portion.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: September 9, 2014
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Satoshi Iitsuka, Tsutomu Kon, Akihiro Hayashi, Katsuki Akuzawa, Kazuyoshi Sugimoto, Yasunori Kiyokawa
  • 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: 8764423
    Abstract: A compressor may include a shell assembly, a first scroll member located within the shell assembly and including a first end plate and a first spiral wrap extending from the first end plate, and a second scroll member located within the shell assembly, supported for orbital movement relative to the first scroll member and including a second end plate and a second spiral wrap extending from the second end plate and meshingly engaged with the first spiral wrap to form compression pockets. The first scroll member may define a fluid injection port and the second scroll member may define a passage in communication with the fluid injection port and at least one of the compression pockets to provide pressurized vapor from the fluid injection port to the at least one of the compression pockets.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: July 1, 2014
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Kirill M. Ignatiev, James F. Fogt
  • Patent number: 8740594
    Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll, a crankshaft rotationally supported on a frame to drive the orbiting scroll, a seal member between an orbiting scroll back surface and the frame, a back pressure chamber of discharge pressure at an inner peripheral side of the seal member, another back pressure chamber of low pressure at an outer peripheral side so that the orbiting scroll is pressed against the fixed scroll with the pressures of these back pressure chambers, and a guide ring supporting an end surface of the seal member at a side opposite to the orbiting scroll and including a guide portion guiding an inner peripheral surface of the seal member so that the seal member is brought into close contact with the orbiting scroll back surface by a wave spring through the guide ring.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: June 3, 2014
    Assignee: Hitachi Appliances, Inc.
    Inventors: Satoshi Nakamura, Mutsunori Matsunaga, Takeshi Tsuchiya, Yuuichi Yanagase, Masatsugu Chikano
  • Patent number: 8734142
    Abstract: Disclosed is a scroll compressor. As two side surfaces of a rotation preventing member are formed to be flat with keys, the rotation preventing member, a main frame, and an orbiting scroll may be easily processed and partial frictions and noise due to the keys may be prevented. Furthermore, since the orbiting scroll is entirely and stably supported by a ring portion of the rotation preventing member, the occurrence of a tilting moment of the orbiting scroll may be reduced. This may enhance the stability and the performance of the scroll compressor.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: May 27, 2014
    Assignee: LG Electrnics Inc.
    Inventors: Myungkyun Kiem, Taesoon Choi, Ikseo Park
  • Patent number: 8702406
    Abstract: A compressor assembly method may include locating a first scroll member on a bearing housing of a compressor having a second scroll member located axially between the first scroll member and the bearing housing. A first outer radial surface on the bearing housing and a second outer radial surface on the first scroll member with an alignment assembly may be engaged to concentrically align the bearing housing and the first scroll member. The first scroll member may be coupled relative to the bearing housing.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: April 22, 2014
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Keith J. Reinhart, Gary J. Diller
  • Patent number: 8678797
    Abstract: A stationary base plate includes a sub-bypass hole, which communicates between a suction chamber and a first compression chamber, and a main bypass hole, which communicates between the suction chamber and a second compression chamber. A rotational center of the orbiting scroll and the sub-bypass hole are located along a first imaginary line. The rotational center of the orbiting scroll is also located along a second imaginary line, which is perpendicular to the first imaginary line. The main bypass hole opens at a location of the stationary base plate, which is on a side of the second imaginary line where the sub-bypass hole is located, so that timing of communicating between the suction chamber and the first compression chamber with each other is deviated from timing of communicating between the suction chamber and the second compression chamber with each other.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: March 25, 2014
    Assignee: DENSO CORPORATION
    Inventors: Shigeru Kawano, Masami Sanuki, Takahiro Ishihara
  • Patent number: 8672655
    Abstract: In a scroll compressor, a pass hole is formed at a position overlapping with a discharge sector of a discharge hole, where a sector for passing a refrigerant through the pass hole is overlapped with a sector for discharging the refrigerant through a discharge hole. This may prevent over-compression of a refrigerant when the scroll compressor is driven at a low speed. This may enhance efficiency of the scroll compressor in a low speed driving mode and under a low load condition.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: March 18, 2014
    Inventors: Jeonghun Kim, Junghoon Park, Sungsoon Jang, Nara Han
  • 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: 8641392
    Abstract: A scroll compressor includes scroll compressor bodies with axial tip seals projecting from the respective scroll ribs of fixed and movable scroll compressor bodies. An extended thrust region is provided in surrounding relation to an inner axial tip sealing region to provide for carrying thrust loads in the event that the scroll compressor bodies are forced axially together. Part of the thrust region may carry a tip seal, while another part may be free of a tip seal. This provides for at least a nominal reverse operation capability.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: February 4, 2014
    Assignee: Bitzer Kuehlmaschinenbau GmbH
    Inventor: James W. Bush
  • Patent number: 8641393
    Abstract: A compressor may include first and second scroll members and a compensation member. The first scroll member may include a first end plate and a first spiral wrap extending therefrom. The second scroll member may include a second end plate and a second spiral wrap. The second end plate may be positioned proximate to a distal end of the first spiral wrap. The first end plate may be positioned proximate to a distal end of the second spiral wrap. The compensation member may engage the first scroll member and having a first reaction to a temperature change causing the first scroll member to maintain a sealed relationship between the first end plate and the distal end of the second spiral wrap.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: February 4, 2014
    Assignee: Emerson Climate Technologies, Inc.
    Inventor: Jean-Luc M. Caillat
  • Patent number: 8628314
    Abstract: A scroll compressor includes a housing; a fixed scroll fixed in the housing; an orbiting scroll that has an orbiting end plate on which a spiral orbiting wall is provided upright and that is supported in the housing so as to be able to orbit while being prevented from rotating, in a state where the orbiting wall is engaged with the fixed wall; a suction section that makes refrigerant containing lubricant flow into a suction chamber provided in the housing; and a plurality of supply flow paths that are provided on a sliding surface between the housing and the orbiting end plate and that are connected to the suction chamber.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: January 14, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Takeuchi, Hiroshi Yamazaki, Shinta Mishima, Tomohisa Moro
  • Patent number: 8628316
    Abstract: A compressor includes a housing, a first scroll member, a second scroll member and a modulation assembly. The first scroll member includes a first end plate having a discharge passage, a first spiral wrap, and a first aperture extending through the first end plate. The second scroll member includes a second end plate having a second spiral wrap extending therefrom and meshingly engaged with the first spiral wrap to form a series of pockets. The first aperture is in communication with a first of the pockets. The modulation assembly is in communication with the first aperture and is operable in a full capacity mode where the first aperture is isolated from a suction pressure region providing full capacity operation and in a reduced capacity mode where the first aperture is in communication with the suction pressure region providing approximately zero capacity operation.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: January 14, 2014
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Masao Akei
  • Patent number: 8628312
    Abstract: A compressor may include a shell, a housing fixed within the shell, first and second scroll members disposed within the shell, a sleeve guide, a fastener, and a washer. The first scroll member may have a first spiral wrap extending from a first end plate and a radially outward extending scroll flange defining an opening. The second scroll member may have a second spiral wrap intermeshed with the first spiral wrap. The sleeve guide may be disposed within the opening in the scroll flange and may define an axial bore. The fastener may be disposed within the axial bore and engaged with the housing. The washer may be located between a head of the fastener and the scroll flange. A first portion of the washer may extend radially outward from the fastener head and may define a rotational stop inhibiting washer rotation through engagement with a rotationally fixed structure.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: January 14, 2014
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Kyle M. Bergman, Walter T. Grassbaugh
  • Patent number: 8602756
    Abstract: Provided is a scroll type compressor which reduces variations in the pressing load of a rotating scroll on a fixed scroll, reduces the impact at the start of the compressor and suppresses noises, and can provide excellent durability. A peripheral elastic body 51 and a bottom-portion elastic body 52, which is brought into a compressed condition in the axis line direction of the main shaft 31, are interposed between a stopper pin 41 on the rotating scroll side and a concave portion 42 on the main shaft 31 side, whereby working errors of each part are compensated and the rotating scroll is constantly brought into close contact with the fixed scroll to maintain the sealing of the compression chamber.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Takeuchi, Takayuki Suzuki, Masahiro Ohta, Kazuhide Watanabe
  • 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: 8591210
    Abstract: A scroll compressor 40 comprises: housing 12, orbiting scroll 26 and fixed scroll 41. The drive shaft 14 has an eccentric shaft portion 18 so that rotation of the eccentric shaft portion imparts an orbiting motion to the orbiting scroll relative to the fixed scroll. Axial spacers 42 are located between the fixed scroll and the housing for spacing the fixed scroll relative to the orbiting scroll. When the scroll compressor 40 is assembled and tested and it is desired to perform shimming, the fixed scroll can be removed and a selected spacer placed in position prior to re-assembling the fixed scroll.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: November 26, 2013
    Assignee: Edwards Limited
    Inventor: Clive Frederick Collie
  • 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: 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: 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: 8550797
    Abstract: A scroll compressor that includes: a housing, a drive unit configured to generate a rotating force; and a scroll compression unit having a fixed scroll having a spiral scroll wrap for compressing a suctioned fluid and fixed irrespective of a rotation of a drive shaft of the drive unit and a swivel scroll swiveled according to rotation of the drive shaft and having a spiral scroll wrap, comprises: a main frame disposed within the housing to support a rear surface of the swivel scroll and having a back pressure chamber in an interior thereof; a thrust plate disposed between the swivel scroll and the main frame; and a sealing member inserted between the swivel scroll and the main frame. The sealing member includes a first sealing member inserted between the swivel scroll and the thrust plate, and a second sealing member inserted between the thrust plate and the main frame.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: October 8, 2013
    Assignees: Doowon Technical College, Doowon Electronic Co., Ltd.
    Inventors: Geon Ho Lee, In Hwe Koo
  • Patent number: 8535029
    Abstract: A scroll type compressor has a rotary shaft, a fixed scroll member, a movable scroll member and a rib. The fixed scroll member has a fixed end plate and a fixed scroll wall. The fixed end plate has first and second sides. The fixed scroll wall is formed on the first side. The movable scroll member has a movable end plate and a movable scroll wall. The movable scroll wall is formed on the movable end plate. The movable scroll member is adapted to make an orbital motion in accordance with the rotation of the rotary shaft whereby a compression chamber to decrease the volume of the compression chamber with the orbital motion of the movable scroll member is formed between the fixed scroll member and the movable scroll member. The rib is provided on the second side so as to extend behind the inner end of the fixed scroll wall.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: September 17, 2013
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Masami Ohno, Shinichi Sato, Akio Saiki, Shinsuke Asou
  • Patent number: 8517703
    Abstract: A compressor hub assembly may include a hub member, a valve retainer and a valve member. The hub member may include first and second portions. The first portion may define an annular hub wall for a compressor and may have a first inner diameter. The second portion may have a second inner diameter greater than the first inner diameter and may define a stepped region between the first and second portions. The valve retainer may be fixed to the hub member at an end of the second portion opposite the stepped region and may define a third inner diameter. The valve member may be located between the valve retainer in the stepped region and may have an outer diameter less than the second inner diameter and greater than the first and third inner diameters.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: August 27, 2013
    Assignee: Emerson Climate Technologies, Inc.
    Inventor: Roy J. Doepker
  • 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
  • Patent number: 8444403
    Abstract: A self-sealing mechanism for a scroll compressor is disposed inside a frame of the scroll compressor at a position between a back-pressure chamber and a fixed scroll, including an accommodating space; a groove communicating the space with the chamber; a one-way valve disposed at one end of the space adjacent to the groove to maintain communication between the space and the groove in a normally closed state; and a suction port penetrating from the space to an entrance of the fixed scroll. When the pressure of the chamber is increased in an instant, the valve is opened in real time for allowing the lubricating oil inside the chamber to flow into the space, thereby regulating the pressure of the chamber. Moreover, the lubricating oil in the space can be sucked under the suction force from the fixed scroll and fill in positions between the fixed scroll and an orbiting scroll.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: May 21, 2013
    Assignee: Industrial Technology Research Institute
    Inventor: Yueh-Ju Tang
  • Patent number: 8408888
    Abstract: A compression mechanism is provided with a first relief port opening only to a first compression chamber, a second relief port opening only to a second compression chamber, and a third relief port which can open to both of the first compression chamber and the second compression chamber.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: April 2, 2013
    Assignee: Daikin Industries, Ltd.
    Inventors: Yoshihiro Nishikawa, Toru Sugiyama
  • Publication number: 20130028769
    Abstract: In one aspect, there is described a rotor of a Wankel engine including a plurality of apex seal members each biased by a respective spring, each spring including an axial action portion and a radial action portion, the axial action portion including at least two radially extending band sections with adjacent ones of the band sections being connected by a fold, one of the band sections contacting a radially extending surface of the apex seal member and another of the band sections contacting a radially extending element of the rotor body, and the radial action portion forming a major part of a length of the spring, contacting an axially extending surface of the apex seal member in two spaced apart locations, and contacting the rotor body between the two spaced apart locations.
    Type: Application
    Filed: October 14, 2011
    Publication date: January 31, 2013
    Inventors: Eugene Gekht, Jean Thomassin, Sebastien Bolduc, David Gagnon-Martin
  • Patent number: 8356987
    Abstract: A compressor may include a shell and a housing fixed within the shell. A compression mechanism may be supported by the housing and may include an orbiting scroll member and a non-orbiting scroll member that are meshingly engaged to form a series of compression pockets. A retaining assembly may include an axial retention member and a rotational retention member, each of which is engaged with the non-orbiting scroll member to limit axial translation and rotation of the non-orbiting scroll member relative to the housing.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: January 22, 2013
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Huaming Guo, Jun You, Yong Cao
  • Patent number: 8337183
    Abstract: A valve for selectively allowing the return of oil from a discharge plenum to a suction plenum includes a passage which is selectively opened or blocked by a valve spool. The valve spool sees a pressure from a discharge pressure location upstream of a discharge check valve on one face, and a discharge pressure from a discharge plenum on an opposed face. While the compressor is running, the two pressures should be relatively equal. The face which sees the pressure from the chamber upstream of the check valve is larger than the face which sees the pressure from the discharge plenum. Thus, when the compressor is running, the valve spool is biased to a first position at which it allows oil return from the discharge plenum to the suction plenum. However, upon shutdown of the compressor, the pressure in the chamber upstream of the discharge valve drops. The valve spool will be driven to a second position at which it blocks communication for oil return.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: December 25, 2012
    Assignee: Danfoss Scroll Technologies, LLC
    Inventors: Tracy L. Milliff, Thomas R. Barlto, Edward A. Tomayko, Joe T. Hill, Carlos Zamudio, Zili Sun, Gene M. Fields, Gregory W. Hahn, John R. Williams
  • Patent number: 8328545
    Abstract: A scroll fluid machine comprises a fixed-side member including a cylindrical casing and a fixed scroll fixed to the casing, and an orbiting scroll and a plurality of ball coupling devices provided between the fixed-side member and the orbiting scroll to prevent self-rotation of the orbiting scroll on its axis and receive a thrust load between the fixed-side member and the orbiting scroll. Each of the ball coupling devices comprises a first ball coupling mechanism for supporting the thrust load generated between the fixed-side member and the orbiting scroll and a second ball coupling mechanism disposed with a space from the first ball coupling mechanism to prevent the self-rotation of the orbiting scroll.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: December 11, 2012
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Yoshio Kobayashi, Yoshiyuki Kanemoto, Yuji Komai, Kazutaka Suefuji, Kiminori Iwano
  • Patent number: 8313318
    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 piston in the first chamber is axially displaceable to isolate the first passage from communication with the second passage when in first and second positions, prevent communication between the first aperture and the first passage when in the first position, and provide communication between the first aperture and the first passage when in the second position.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: November 20, 2012
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Robert C. Stover, Masao Akei
  • Patent number: 8308460
    Abstract: A scroll compressor includes a fixed scroll having a fixed wrap, and an orbiting scroll having an orbiting wrap engaged with the fixed wrap to define a first compression chamber between an inner surface of the fixed wrap and an outer surface of the orbiting wrap, and to define a second compression chamber between an inner surface of the orbiting wrap and an outer surface of the fixed wrap. A rotation shaft is provided with an eccentric portion at one end thereof to drive the orbiting scroll. A protruding portion protrudes inwardly from an inner end of the fixed wrap, and contacts the orbiting wrap. A distance between a center of the eccentric portion and a tangent line at a contact point between the protruding portion and the orbiting wrap at an end of the first compression chamber is smaller than a radius of the eccentric portion.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: November 13, 2012
    Assignee: LG Electronics Inc.
    Inventors: Sanghun Seong, Cheolhwan Kim, Byeongchul Lee, Samchul Ha
  • Patent number: 8303279
    Abstract: A scroll compressor is provided with injection tubes which extend through an upper shell and into a fixed scroll member. The injection tubes are fixed relative to the fixed scroll member, and may be press-fit or otherwise secured. This arrangement simplifies the provision of injection ports into a scroll compressor.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: November 6, 2012
    Assignee: Danfoss Scroll Technologies, LLC
    Inventor: Gregory W. Hahn
  • Patent number: 8303278
    Abstract: A scroll compressor that utilizes liquid or vapor injection to cool a working fluid being compressed by an orbiting scroll member and a non-orbiting scroll member, and/or to increase the efficiency of the compressor. An injection fitting is secured to, and extends through, the compressor housing and receives liquid or vapor working fluid from a source external to the compressor. The non-orbiting scroll member may be fixedly mounted with respect to the crankcase of the compressor, and internal passages formed within the crankcase and the non-orbiting scroll member, which are substantially isolated from the suction pressure and discharge pressure chambers of the compressor, are used to convey liquid or vapor working fluid from the injection fitting into intermediate pressure working pockets defined between the scroll members.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: November 6, 2012
    Assignee: Tecumseh Products Company
    Inventors: Johnathan P. Roof, Anil Gopinathan, Damanjit Singh
  • Patent number: 8241021
    Abstract: In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the invention includes the self-start synchronous motor which starts as an induction-motor and performs synchronous operation by performing synchronization pull-in almost at a synchronous rotational frequency, a compression part having a compression chamber which compresses a working fluid, and a hermetic container which houses the self-start synchronous motor and the compression part. The displacement type compressor is provided with a start load reducing means which reduces a load of the compression part at startup and is placed at the compression part in the hermetic container.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: August 14, 2012
    Assignee: Hitachi Appliances, Inc.
    Inventors: Takeshi Tsuchiya, Yuuichi Yanagase, Kazuyuki Fujimura, Mutsunori Matsunaga, Shigekazu Nozawa, Kenji Tojo, Haruo Koharagi, Satoshi Kikuchi, Hirokatsu Kohsokabe