Patents by Inventor Ronald J. Duppert

Ronald J. Duppert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10634137
    Abstract: A refrigeration system with two or more compressors configured to compress a flow of refrigerant with oil entrained therein. A suction flow piping arrangement is configured to supply a flow of refrigerant and oil to the two or more compressors. The suction flow piping arrangement has a suction header configured to carry the flow of refrigerant and oil, and a primary compressor supply conduit connected to the suction header. The primary compressor supply conduit supplies refrigerant and oil to a first compressor of the two or more compressors. A secondary compressor supply conduit branches off from the suction header. The secondary compressor supply conduit supplies refrigerant to a second compressor of the two or more compressors. The primary compressor supply conduit is configured to supply more oil to the first compressor than the secondary compressor supply conduit supplies to the second compressor.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: April 28, 2020
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: Bruce A. Fraser, Ronald J. Duppert, Wayne P. Beagle
  • Patent number: 10626870
    Abstract: A discharge check valve assembly for a compressor having a discharge opening. The discharge check valve assembly includes a valve body adapted to be positioned at the discharge opening of the compressor. A discharge tube is assembled to the valve body, and a check valve member is disposed in the valve body. In certain embodiments, the check valve member is biased in a closed position by a biasing spring. A weld block member is positioned at an interface between the valve body and the discharge tube, and a first weld couples the discharge tube and the valve body at a first weld point.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: April 21, 2020
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: Kurt William Robert Bessel, Ronald J. Duppert, Todd M. Lynch
  • Patent number: 9951772
    Abstract: A scroll compressor includes scroll compressor bodies, which, in turn, include a fixed scroll compressor body and a moveable scroll compressor body. The scroll compressor bodies have respective bases and respective scroll ribs that project from the respective bases, and which mutually engage about an axis for compressing fluid. The scroll compressor also includes a housing to house the scroll compressor bodies. A separator plate is configured to separate a high-pressure gas chamber from a low-pressure gas chamber within the housing. The separator plate has no machined surfaces, and has an outer perimeter portion which is attached to an unmachined inner surface of the housing. Having no machined surfaces indicates that no material is removed from the separator plate during its manufacture apart from operations to form initial inner and outer diameters of the separator plate.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: April 24, 2018
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: Ronald J. Duppert, Kurt William Robert Bessel
  • Patent number: 9920762
    Abstract: A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing. The scroll bodies include a first scroll body and a second scroll body. The first and second scroll bodies have respective bases and respective scroll ribs that project from the respective bases. Further, the scroll ribs mutually engage such that the second scroll body is movable relative to the first scroll body to compress fluid. A drive shaft has an eccentric drive pin configured to engage a drive hub on the second scroll body. The scroll compress also includes a slider block that fits over the drive pin. The slider block has a first drive surface configured to engage a second drive surface of the drive pin. In particular embodiments, the slider block can tilt about one or more edges of the second drive surface when the drive shaft is deflected under load.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: March 20, 2018
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: James W. Bush, Ronald J. Duppert
  • Patent number: 9909586
    Abstract: A scroll compressor includes a housing, and scroll compressor bodies disposed in the housing. The scroll bodies include a first and second scroll bodies. The first and second scroll bodies have respective bases and respective scroll ribs that project from the respective bases, wherein the scroll ribs mutually engage. The second scroll body is movable relative to the first scroll body for compressing fluid. A drive unit rotates a drive shaft to drive the second scroll body in an orbital path. The drive shaft has an eccentric drive configured to engage a corresponding drive hub on the second scroll body. The eccentric drive has a drive surface acting on the corresponding drive hub in a first plane. The drive shaft has a locating feature for a counterweight. The locating feature is aligned in either the first plane or a second plane parallel to the first plane.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: March 6, 2018
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventor: Ronald J. Duppert
  • Patent number: 9890784
    Abstract: A fixed scroll compressor body includes a scroll compressor body casting. The casting has a central body portion having a plate-like base with a spiral scroll rib projecting from the base at a right angle thereto. The spiral scroll rib includes a volume between the spiraled ribs for the compressing of refrigerant. The spiral scroll rib spirals from a central region of the plate-like base to an outer wall of the central body portion. The casting further includes a first inward-protruding portion that protrudes from the outer wall into the volume. A distance that the first inward-protruding portion protrudes into the volume is greater than a thickness of the first inward-protruding portion such that removal of the first inward-protruding portion results in a first intake opening in the outer wall. The first intake opening provides a path for a flow of refrigerant into the volume.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: February 13, 2018
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventor: Ronald J. Duppert
  • Patent number: 9777731
    Abstract: A compressor for compressing fluid is provided. The compressor includes a housing having a housing inlet for receiving fluid and a housing outlet for discharging the fluid. A compressing mechanism is adapted to compress the fluid toward the housing outlet. The compressing mechanism is disposed in the housing. A drive unit is operatively connected to the compressing mechanism for driving the compressing mechanism to compress fluid. A suction duct is disposed in the housing. The suction duct extends vertically downward from the housing inlet toward a sump defined in the housing. The suction duct is configured for attachment to a motor housing. The suction duct has a duct inlet fluidically connected with the housing inlet, and defines a passage fluidically connecting the duct inlet with an interior cavity of the housing. A suction gas filter disposed in the suction duct, and having a filter screen positioned downstream of the duct inlet.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: October 3, 2017
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: Kurt W. R. Bessel, Ronald J. Duppert, Bruce A. Fraser
  • Patent number: 9689386
    Abstract: A method of operating a refrigeration system uses a plurality of compressors in connected parallel. The method includes returning refrigerant and oil to the compressors, the refrigerant also having oil entrained therein, separating the oil entrained in the refrigerant, and returning more of the oil entrained in the refrigerant to a lead compressor of the plurality of compressors regardless of whether the lead compressor is operating. The method also includes connecting the oil sumps of all of the plurality of compressors such that oil is supplied from the lead compressor to at least one non-lead compressor of the plurality of compressors when the at least one non-lead compressor is operating.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: June 27, 2017
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: Bruce A. Fraser, Ronald J. Duppert, Wayne P. Beagle, Kurt William Robert Bessel
  • Patent number: 9568002
    Abstract: A scroll compressor includes a fixed scroll compressor body and a moveable scroll compressor body that are arranged for relative orbital movement relative to one another to facilitate compression of refrigerant. The scroll compressor includes a key coupling acting upon the moveable scroll compressor body. The key coupling includes a ring body with a plurality of keys, with key contact surfaces, each of the keys projecting axially from the ring body. The key coupling includes four keys in separate quadrants defined by perpendicular lateral axes. The key coupling guides orbital movement of the moveable scroll compressor body along a linear translational path along a lateral axis.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: February 14, 2017
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: Ronald J. Duppert, James W. Bush
  • Publication number: 20170022989
    Abstract: A scroll compressor with unfastened thrust plate includes a compressor housing and scroll compressor bodies disposed in the compressor housing. The scroll bodies include a fixed scroll body and a moveable scroll body. The fixed and moveable scroll bodies have respective bases and respective scroll ribs that project from the respective bases. The scroll ribs mutually engage. The moveable scroll body is movable relative to the fixed scroll body for compressing fluid. An upper bearing member provides axial thrust support to the moveable scroll compressor body through a bearing support via an unfastened thrust plate that is located between the upper bearing member and the moveable scroll body. The unfastened thrust plate has no means of attachment to the upper bearing member or to the moveable scroll body.
    Type: Application
    Filed: July 21, 2015
    Publication date: January 26, 2017
    Applicant: BITZER Kuehlmaschinenbau GmbH
    Inventors: Ronald J. Duppert, James William Bush, Wayne P. Beagle
  • Publication number: 20170002812
    Abstract: A suction fitting coupled to a scroll compressor that has an outer housing with an inside diameter and a suction port defined in a wall of the outer housing. A suction duct is disposed inside the outer housing at a spaced distance from the wall of the outer housing. The suction duct defines an entrance port aligned with the suction port. The suction fitting includes a first member being generally cylindrical, and a second member being generally cylindrical. The second member is disposed inside the first member with a portion of the second member extending into the outer housing through the suction port, spanning the spaced distance to the suction duct, and coupling with the entrance port of the suction duct. Neither the first member nor the second member includes a suction screen for filtering out solid contaminants in a flow of refrigerant.
    Type: Application
    Filed: June 30, 2015
    Publication date: January 5, 2017
    Applicant: BITZER Kuehlmaschinenbau GmbH
    Inventor: Ronald J. Duppert
  • Publication number: 20170002811
    Abstract: A fixed scroll compressor body includes a scroll compressor body casting. The casting has a central body portion having a plate-like base with a spiral scroll rib projecting from the base at a right angle thereto. The spiral scroll rib includes a volume between the spiraled ribs for the compressing of refrigerant. The spiral scroll rib spirals from a central region of the plate-like base to an outer wall of the central body portion. The casting further includes a first inward-protruding portion that protrudes from the outer wall into the volume. A distance that the first inward-protruding portion protrudes into the volume is greater than a thickness of the first inward-protruding portion such that removal of the first inward-protruding portion results in a first intake opening in the outer wall. The first intake opening provides a path for a flow of refrigerant into the volume.
    Type: Application
    Filed: June 30, 2015
    Publication date: January 5, 2017
    Applicant: BITZER KUEHLMASCHINENBAU GMBH
    Inventor: Ronald J. Duppert
  • Publication number: 20160369799
    Abstract: A scroll compressor includes a housing comprising a cylindrical shell arranged about a vertically-extending axis, and scroll compressor bodies, including a fixed scroll compressor body and a movable scroll compressor body. The scroll compressor bodies are disposed in the housing and have respective bases and respective scroll ribs that project from the respective bases and which mutually engage for compressing fluid. An electrical motor has a stator and rotor. There is a drive shaft and rotor that acts upon the drive shaft that acts upon the scroll compressor bodies to facilitate relative movement between the scroll compressor bodies. A separator plate is disposed in the housing to separate a high-pressure region from a lower pressure region. The separator plate has a central opening. A perimeter of the central opening is defined by a curved inner wall. The curved inner wall is joined to an outer wall via an annular plate.
    Type: Application
    Filed: June 18, 2015
    Publication date: December 22, 2016
    Applicant: BITZER KUEHLMASCHINENBAU GMBH
    Inventor: Ronald J. Duppert
  • Publication number: 20160369798
    Abstract: A scroll compressor includes scroll compressor bodies, which, in turn, include a fixed scroll compressor body and a moveable scroll compressor body. The scroll compressor bodies have respective bases and respective scroll ribs that project from the respective bases, and which mutually engage about an axis for compressing fluid. The scroll compressor also includes a housing to house the scroll compressor bodies. A separator plate is configured to separate a high-pressure gas chamber from a low-pressure gas chamber within the housing. The separator plate has no machined surfaces, and has an outer perimeter portion which is attached to an unmachined inner surface of the housing. Having no machined surfaces indicates that no material is removed from the separator plate during its manufacture apart from operations to form initial inner and outer diameters of the separator plate.
    Type: Application
    Filed: August 31, 2015
    Publication date: December 22, 2016
    Inventors: Ronald J. Duppert, Kurt William Robert Bessel
  • Publication number: 20160369803
    Abstract: A compressor for compressing fluid is provided. The compressor includes a housing having a housing inlet for receiving fluid and a housing outlet for discharging the fluid. A compressing mechanism is adapted to compress the fluid toward the housing outlet. The compressing mechanism is disposed in the housing. A drive unit is operatively connected to the compressing mechanism for driving the compressing mechanism to compress fluid. A suction duct is disposed in the housing. The suction duct extends vertically downward from the housing inlet toward a sump defined in the housing. The suction duct is configured for attachment to a motor housing. The suction duct has a duct inlet fluidically connected with the housing inlet, and defines a passage fluidically connecting the duct inlet with an interior cavity of the housing. A suction gas filter disposed in the suction duct, and having a filter screen positioned downstream of the duct inlet.
    Type: Application
    Filed: June 16, 2015
    Publication date: December 22, 2016
    Applicant: BITZER Kuehlmaschinenbau GmbH
    Inventors: Kurt W.R. Bessel, Ronald J. Duppert, Bruce A. Fraser
  • Publication number: 20160363122
    Abstract: A discharge check valve assembly for a compressor having a discharge opening. The discharge check valve assembly includes a valve body adapted to be positioned at the discharge opening of the compressor. A discharge tube is assembled to the valve body, and a check valve member is disposed in the valve body. In certain embodiments, the check valve member is biased in a closed position by a biasing spring. A weld block member is positioned at an interface between the valve body and the discharge tube, and a first weld couples the discharge tube and the valve body at a first weld point.
    Type: Application
    Filed: June 11, 2015
    Publication date: December 15, 2016
    Applicant: BITZER Kuehlmaschinenbau GmbH
    Inventors: Kurt William Robert Bessel, Ronald J. Duppert, Todd M. Lynch
  • Publication number: 20160356274
    Abstract: A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing. A motor is disposed within the housing and operably connected to a drive shaft for driving one of the scroll compressor bodies. The drive shaft is rotationally supported at one end by a crankcase which includes a bearing housing and a bearing. The crankcase includes a plurality of openings or gas passages passing through the crankcase, as well as a plurality of generally cylindrical sections positioned respectively between adjacent openings. The cylindrical sections define contact regions which can engage an inner periphery of the housing when the crankcase is mounted therein.
    Type: Application
    Filed: August 16, 2016
    Publication date: December 8, 2016
    Applicant: BITZER Kuehlmaschinenbau GmbH
    Inventors: Ronald J. Duppert, Xianghong Wang
  • Patent number: 9458850
    Abstract: A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing. A motor is disposed within the housing and operably connected to a drive shaft for driving one of the scroll compressor bodies. The drive shaft is rotationally supported at one end by a crankcase which includes a bearing housing and a bearing. The crankcase includes a plurality of openings or gas passages passing through the crankcase, as well as a plurality of generally cylindrical sections positioned respectively between adjacent openings. The cylindrical sections define contact regions which can engage an inner periphery of the housing when the crankcase is mounted therein.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: October 4, 2016
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: Ronald J. Duppert, Xianghong Wang
  • Patent number: 9322404
    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: April 3, 2015
    Date of Patent: April 26, 2016
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: Johnathan P. Roof, Ronald J. Duppert
  • Patent number: 9181940
    Abstract: A compressor that includes a housing with a plurality of attached shell sections which define an internal volume of the compressor. In the housing, compressor bodies have respective surfaces which mutually engage. The compressor includes a drive unit disposed in the housing. The drive unit has a motor to provide a mechanical output on a drive shaft. The drive shaft drives one of the compressor bodies to facilitate relative movement for the compression of fluid. In an embodiment, the plurality of shell sections includes a base plate having an annular rib, which locates a tubular central shell section of the plurality of attached shell sections.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: November 10, 2015
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: James G. Cullen, Jr., Ronald J. Duppert, Kurt William Robert Bessel, Xianghong Wang