Patents Assigned to Tecumseh Products Company
  • Patent number: 8567057
    Abstract: A method of assembling a compressor, including assembling, first as a subassembly external of the compressor housing, portions of the motor-compressor unit, including a crankcase, mount brackets, stator, outboard bearing assembly, and drive shaft. Thereafter, the motor-compressor unit subassembly is inserted into a first end of the housing, and the housing is shrink-fit around the subassembly. The mount brackets may then be welded to the interior surface of the housing. Once the mount brackets are welded to the housing, the remainder of the components of the motor-compressor unit, including the orbiting scroll member, the Oldham coupling, and the fixed scroll member, are then assembled to the motor-compressor unit subassembly and the housing through a second end of the housing opposite the first end, followed by welding the top and bottom caps to the housing.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: October 29, 2013
    Assignee: Tecumseh Products Company
    Inventor: Anil Gopinathan
  • 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
  • Publication number: 20120151767
    Abstract: A method of assembling a compressor, including assembling, first as a subassembly external of the compressor housing, portions of the motor-compressor unit, including a crankcase, mount brackets, stator, outboard bearing assembly, and drive shaft. Thereafter, the motor-compressor unit subassembly is inserted into a first end of the housing, and the housing is shrink-fit around the subassembly. The mount brackets may then be welded to the interior surface of the housing. Once the mount brackets are welded to the housing, the remainder of the components of the motor-compressor unit, including the orbiting scroll member, the Oldham coupling, and the fixed scroll member, are then assembled to the motor-compressor unit subassembly and the housing through a second end of the housing opposite the first end, followed by welding the top and bottom caps to the housing.
    Type: Application
    Filed: February 23, 2012
    Publication date: June 21, 2012
    Applicant: TECUMSEH PRODUCTS COMPANY
    Inventor: Anil Gopinathan
  • Patent number: 8152503
    Abstract: A baffle member for use in scroll compressors. In one exemplary embodiment, the baffle member is attached to a portion of the crankcase and, in use, deflects lubricant that may be thrown from the thrust surface of the crankcase during operation of the compressor away from the flow of working fluid, and also aids in directing the flow of working fluid away from the thrust surface of the crankcase and toward a suction inlet in the compression mechanism.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: April 10, 2012
    Assignee: Tecumseh Products Company
    Inventor: David K. Haller
  • Patent number: 8152497
    Abstract: In sealed compressors, in one form of the invention, the compressor housing and the compression mechanism are assembled to one another without fasteners. As a result, the time required to install and tighten the fasteners is eliminated, lessen the time required to assemble the compressor. Further, such a fastenerless assembly requires less parts and machining, further reducing the cost of the compressor. Additionally, in one form of the invention, the compression mechanism includes two bearings mounted to the compressor housing and a cylinder block reciprocatingly driven between the bearings by an eccentric member of the crankshaft. Typically, the cylinder block of existing compressors is rigidly mounted to the compressor housing and does not reciprocate.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: April 10, 2012
    Assignee: Tecumseh Products Company
    Inventors: Edwin L. Gannaway, Clayton Carn
  • Patent number: 8147229
    Abstract: A method of assembling a compressor, including assembling, first as a subassembly external of the compressor housing, portions of the motor-compressor unit, including a crankcase, mount brackets, stator, outboard bearing assembly, and drive shaft. Thereafter, the motor-compressor unit subassembly is inserted into a first end of the housing, and the housing is shrink-fit around the subassembly. The mount brackets may then be welded to the interior surface of the housing. Once the mount brackets are welded to the housing, the remainder of the components of the motor-compressor unit, including the orbiting scroll member, the Oldham coupling, and the fixed scroll member, are then assembled to the motor-compressor unit subassembly and the housing through a second end of the housing opposite the first end, followed by welding the top and bottom caps to the housing.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: April 3, 2012
    Assignee: Tecumseh Products Company
    Inventor: Anil Gopinathan
  • Patent number: 8057202
    Abstract: A scroll compressor including a non-orbiting and an orbiting scroll member having mating involute wraps extending therefrom. In one exemplary embodiment, at least one of the non-orbiting and orbiting scroll members includes an inner wall forming a groove in an end of the involute wrap and extending substantially entirely along the length thereof. Positioned within the groove is a tip seal having outwardly extending projections configured to engage the inner walls of the involute wrap along at least a portion thereof. In one exemplary embodiment, the tip seal has a length that is less than the length of the groove. As a result, a gap is formed at the innermost portion of the involute wrap between the end of the groove and the end of the tip seal.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: November 15, 2011
    Assignee: Tecumseh Products Company
    Inventor: David K. Haller
  • Publication number: 20110119916
    Abstract: A complete refrigeration system (CRS) including at least one heat exchanger which is designed to occupy an irregular volume to reduce the overall profile of the CRS. The heat exchanger may be a condenser or an evaporator, and includes a substantially solid body made of a thermally conductive metal, plastic, or other material. A plurality of fluid and refrigerant passageways are defined substantially within the solid body for conducing fluid and refrigerant, respectively, through the solid body and facilitating the transfer of heat between the fluid and refrigerant. Also disclosed is a method wherein the spatial orientation of each passageway is optimized with respect to all of the other passageways and the walls of the solid body by determining the relative distance of each passageway from all of the other passageways and the walls of the solid body at a plurality of points along each passageway, followed by adjusting the spatial orientation of the passageway accordingly.
    Type: Application
    Filed: January 31, 2011
    Publication date: May 26, 2011
    Applicant: TECUMSEH PRODUCTS COMPANY
    Inventors: Dan M. Manole, Donald L. Coffey
  • Publication number: 20110076169
    Abstract: The eccentric on the crankshaft of a rotary compressor, as well as the roller that surrounds the crankshaft, is replaced by an elliptical cam that acts as a double eccentric. In this manner, the elliptical cam provides for proper balancing of the crankshaft and other components of the compressor, while eliminating the need to use counterweights. Specifically, the elliptical cam is symmetrical, resulting in equal forces acting on opposing sides of the elliptical cam. This allows the elliptical cam to maintain its balance throughout its rotation, even when operating at a high rate of revolution.
    Type: Application
    Filed: September 24, 2010
    Publication date: March 31, 2011
    Applicant: TECUMSEH PRODUCTS COMPANY
    Inventors: Donald L. Coffey, James R. Lenz
  • Patent number: 7900354
    Abstract: A complete refrigeration system (CRS) including at least one heat exchanger which is designed to occupy an irregular volume to reduce the overall profile of the CRS. The heat exchanger may be a condenser or an evaporator, and includes a substantially solid body made of a thermally conductive metal, plastic, or other material. A plurality of fluid and refrigerant passageways are defined substantially within the solid body for conducing fluid and refrigerant, respectively, through the solid body and facilitating the transfer of heat between the fluid and refrigerant. Also disclosed is a method wherein the spatial orientation of each passageway is optimized with respect to all of the other passageways and the walls of the solid body by determining the relative distance of each passageway from all of the other passageways and the walls of the solid body at a plurality of points along each passageway, followed by adjusting the spatial orientation of the passageway accordingly.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: March 8, 2011
    Assignee: Tecumseh Products Company
    Inventors: Dan M. Manole, Donald L. Coffey
  • Patent number: 7866962
    Abstract: A two-stage rotary compressor having a compression mechanism including a single muffler housing member. The single muffler housing member at least partially defines an intermediate pressure discharge cavity and a discharge pressure discharge cavity. In one exemplary embodiment, the compression mechanism includes a cylinder block having a plurality of vanes positioned within slots formed in an inner cylindrical surface of the cylinder block. The slots are in fluid communication with the discharge pressure discharge cavity and receive discharge pressure working fluid to bias the vanes radially inwardly. In another exemplary embodiment, the cylinder block includes a plurality of passages for the delivery of working fluid to and from the cylinder block.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: January 11, 2011
    Assignee: Tecumseh Products Company
    Inventor: Joseph A. Newland
  • Patent number: 7862312
    Abstract: A scroll compressor including a hermetic housing with a motor-compressor unit disposed therein, including fixed and orbiting scrolls. The fixed scroll defines perpendicular axial and radial directions, and includes an outer wall having a suction inlet facing substantially in the radial direction. A baffle member is associated with the suction inlet of the fixed scroll, and in one embodiment, is attached to the fixed scroll with fasteners. The baffle member includes a first open end facing in the axial direction toward a suction port of the compressor housing, and a second open end facing in the radial direction in fluid flow alignment with the suction inlet of the fixed scroll. The baffle member directs a portion of the working fluid which enters the compressor housing substantially directly into the suction inlet of the fixed scroll to reduce turbulent flow of the working fluid within the compressor housing, improving the operating efficiency of the compressor.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: January 4, 2011
    Assignee: Tecumseh Products Company
    Inventor: Anil Gopinathan
  • Publication number: 20100288477
    Abstract: The present invention relates to a condenser or other component that is attached to the base plate by means of integral torque tabs that are twisted underneath the base plate to draw the condenser or other component downwardly against the upper surface of the base plate. In a preferred embodiment, the torque tabs are located on the lower ends of the condenser or other component end plates. The tabs are preferably designed to be machine twisted to provide enough holding force to maintain the condenser or other component and base plate in a rigid condition.
    Type: Application
    Filed: May 12, 2010
    Publication date: November 18, 2010
    Applicant: TECUMSEH PRODUCTS COMPANY
    Inventors: Genc Jani, Stefan Paul
  • Patent number: 7779648
    Abstract: A complete refrigeration system (CRS) including at least one heat exchanger which is designed to occupy an irregular volume to reduce the overall profile of the CRS. The heat exchanger may be a condenser or an evaporator, and includes a substantially solid body made of a thermally conductive metal, plastic, or other material. A plurality of fluid and refrigerant passageways are defined substantially within the solid body for conducing fluid and refrigerant, respectively, through the solid body and facilitating the transfer of heat between the fluid and refrigerant. Also disclosed is a method wherein the spatial orientation of each passageway is optimized with respect to all of the other passageways and the walls of the solid body by determining the relative distance of each passageway from all of the other passageways and the walls of the solid body at a plurality of points along each passageway, followed by adjusting the spatial orientation of the passageway accordingly.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: August 24, 2010
    Assignee: Tecumseh Products Company
    Inventors: Dan M. Manole, Donald L. Coffey
  • Patent number: 7752860
    Abstract: A method and apparatus for improving the rate of heat transfer between an evaporator of a refrigeration system and the environment surrounding the evaporator. In one embodiment, the evaporator is placed in thermal communication with the air of a data center where electronic equipment is operated therein. To improve the rate of heat transfer between the air and the evaporator, water is evaporated into the air before it flows over the evaporator coils. As a result, when the humidified air flows over the cold evaporator coils, a portion of the water vapor in the air condenses on the evaporator, thereby wetting the evaporator coils. The wetted surfaces of the evaporator coils improve the rate of heat transfer between the air and, ultimately, the refrigerant passing through the evaporator. In one embodiment, a humidifier having a water atomizer may be used for spraying and dispersing water into the air.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: July 13, 2010
    Assignee: Tecumseh Products Company
    Inventor: Dan M. Manole
  • Patent number: 7726151
    Abstract: A method and apparatus for maintaining a relatively constant temperature of a working fluid in an evaporator of a refrigeration system by providing a constant volumetric displacement compressor and a heat exchanger for exchanging heat between the high pressure and low pressure portions of a refrigeration circuit to superheat, and hold substantially constant, the temperature of the refrigerant entering the compressor. In doing this, the pressure of the refrigerant in the low pressure portion of the circuit, including the evaporator, and the mass flow rate of the refrigerant remain substantially constant. As a result, the temperature of the saturated refrigerant in the evaporator remains substantially constant.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: June 1, 2010
    Assignee: Tecumseh Products Company
    Inventor: Dan M Manole
  • Patent number: 7721569
    Abstract: A transcritical vapor compression system that includes a fluid circuit circulating a refrigerant in a closed loop. The fluid circuit has operably disposed therein, in serial order, a compressor, a first heat exchanger, a first capillary tube and a second heat exchanger. The compressor compresses the refrigerant from a low pressure to a supercritical pressure. The first heat exchanger is positioned in a high pressure side of the fluid circuit and the second heat exchanger is positioned in a low pressure side of the fluid circuit. The first capillary tube reduces the pressure of the refrigerant from a supercritical pressure to a relatively lower pressure. The refrigerant flows through the first capillary tube at its critical velocity and means for controlling the temperature of the refrigerant in the first capillary tube are provided.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: May 25, 2010
    Assignee: Tecumseh Products Company
    Inventor: Dan M. Manole
  • Publication number: 20100021330
    Abstract: A baffle member for use in scroll compressors. In one exemplary embodiment, the baffle member is attached to a portion of the crankcase and, in use, deflects lubricant that may be thrown from the thrust surface of the crankcase during operation of the compressor away from the flow of working fluid, and also aids in directing the flow of working fluid away from the thrust surface of the crankcase and toward a suction inlet in the compression mechanism.
    Type: Application
    Filed: June 15, 2009
    Publication date: January 28, 2010
    Applicant: Tecumseh Products Company
    Inventor: David K. Haller
  • Publication number: 20100008807
    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: Application
    Filed: July 6, 2009
    Publication date: January 14, 2010
    Applicant: TECUMSEH PRODUCTS COMPANY
    Inventors: Johnathan P. Roof, Anil Gopinathan, Damanjit Singh
  • Publication number: 20090301109
    Abstract: A transcritical vapor compression system includes a fluid circuit circulating a refrigerant in a closed loop. The fluid circuit has operably disposed therein, in serial order, a first compressor, an intercooler, a second compressor with a variable capacity, a first heat exchanger, an expansion device and a second heat exchanger. The first compressor compresses the refrigerant from a low pressure to an intermediate pressure. The second compressor compresses the refrigerant from the intermediate pressure to a supercritical pressure. The first heat exchanger is positioned in a high pressure side of the fluid circuit. The second heat exchanger is positioned in a low pressure side of the fluid circuit. The expansion device reduces the pressure of the refrigerant from a supercritical pressure to a relatively lower pressure. Cooling means cools the refrigerant within one of the compressors.
    Type: Application
    Filed: August 18, 2009
    Publication date: December 10, 2009
    Applicant: TECUMSEH PRODUCTS COMPANY
    Inventor: Dan M. Manole