Patents by Inventor Rongchang Xin

Rongchang Xin 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).

  • Publication number: 20190362824
    Abstract: It is possible that an analyzer may be operated such that it may perform tests to identify the presence or absence of a specified condition. Such tests may be performed using behaviors which are specific to the specified condition, and the results of those tests may be presented in a single output.
    Type: Application
    Filed: May 23, 2018
    Publication date: November 28, 2019
    Inventors: Rongchang Xin, Carlos A. Ramirez
  • Publication number: 20190324036
    Abstract: Embodiments of the present technology include a method for testing a blood sample for sepsis. The method may include receiving a blood sample from an individual. The method may also include executing an instruction to analyze the blood sample for sepsis. In addition, the method may include measuring values of a set of characteristics in the blood sample. The set of characteristics being determined prior to measuring the values. The method may further include analyzing the values of the set of characteristics to produce a representation of a suspicion of sepsis. In addition, the method may include displaying the representation. Embodiments also include systems for testing blood sample for sepsis.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Inventors: Rongchang Xin, Carlos A. Ramirez
  • Patent number: 8323984
    Abstract: A method for preparing a volume of blood for cellular analysis in a hematology instrument includes the step of gently mixing the blood sample with a reagent and/or diluent using a stream of air. Preferably, the air stream is directed at the liquid(s) to be mixed at a relatively steep angle, preferably less than about 10 degrees from the normal to the liquid surface. A mixing vessel adapted for use in a hematology instrument for carrying out the method of the invention comprises a cap that supports an air jet for directing the air stream at an angle in keeping with the method of the invention.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: December 4, 2012
    Assignee: Beckman Coulter, Inc.
    Inventors: Tomas Betancourt, Santos E. Vargas, William Weigong Li, Rongchang Xin
  • Patent number: 8146625
    Abstract: A method for preventing either the introduction of air into a liquid aspirated from a container through an aspiration line passing through a container cap, or the over-filling or non-filling of a container by a liquid dispensed through a dispensing line passing through a container cap. Such method comprises the steps of simultaneously detecting that (a) the container cap is properly positioned on and secured to a liquid container from which liquid is to be aspirated, or into which a liquid is to be dispensed, and (b) detecting that the level of liquid in the container is either above or below a predetermined level.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: April 3, 2012
    Assignee: Beckman Coulter, Inc.
    Inventors: Rongchang Xin, Eric M. Grace, William W. Li, Santos Vargas
  • Patent number: 7910074
    Abstract: A liquid transfer system for transferring liquid from a plurality of containers to a plurality of destinations comprises a plurality of inlet valves. Each inlet valve is operable between an open position allowing liquid from a container to be drawn into the system and a closed position blocking liquid from a container from being drawn into the system. Liquid drawn from each of the liquid containers is delivered to a buffer chamber designed to degas the liquid in the buffer chamber. The buffer chamber leads to a vented feeder chamber that is also adapted to retain a volume of liquid. A chamber connection valve is provided between the buffer chamber and the feeder chamber to allow or block the flow of liquid between the buffer chamber and the feeder chamber. The feeder chamber is connected to a plurality of distribution valves operable to deliver liquid to a plurality of destinations.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: March 22, 2011
    Assignee: Beckman Coulter, Inc.
    Inventors: William W. Li, Rongchang Xin, Elgardo Echevarria, John A. Mitchell
  • Patent number: 7794666
    Abstract: Method and apparatus for controlling the temperature of one or more reaction vessels in a bio-chemical analyzer comprises a heat-exchange block, preferably made of cast aluminum or the like, and a thermoelectric device for heating or cooling the block to within a desired temperature range. The heat-transfer block cradles one or more reaction vessels in a thermal energy-transferring relationship, and further supports, in a thermal energy-transferring relationship, one or more fluid conduits serving to transmit a liquid or gas to the interior of the reaction vessels. Preferably, the heat-transfer block is cast from aluminum, and the fluid conduits are disposed inside the casting.
    Type: Grant
    Filed: February 7, 2006
    Date of Patent: September 14, 2010
    Assignee: Beckman Coulter, Inc.
    Inventors: William W. Li, Rongchang Xin, Wing S. Pang, Dobson M. Okawa
  • Publication number: 20090206176
    Abstract: A method for preventing either the introduction of air into a liquid aspirated from a container through an aspiration line passing through a container cap, or the over-filling or non-filling of a container by a liquid dispensed through a dispensing line passing through a container cap.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 20, 2009
    Applicant: BECKMAN COULTER, INC.
    Inventors: Rongchang Xin, Eric M. Grace, William W. Li, Santos Vargas
  • Patent number: 7546936
    Abstract: A liquid aspiration device comprises an aspiration tube that slideably engages an opening in a cap such that a head on the end of the aspiration tube is moveable with respect to the opening in the cap. A tube cover is positioned between the opening in the cap and the head of the tube. The tube cover is operable to collapse into the cap when the head is moved into the cap. When the head and the tube cover are moved into the cap they are shielded from potential contamination that may occur when the aspiration device is moved from one container to the next. A lock is positioned in the cap. The lock is operable to move between an engaged position where the head may be retained within the cap and a disengaged position where the head is free to pass into or out of the cap.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: June 16, 2009
    Assignee: Beckman Coulter, Inc.
    Inventors: Rongchang Xin, William Weigong Li
  • Patent number: 7275430
    Abstract: A method and apparatus for sensing different levels of liquids in their respective containers in a liquid-consuming and/or producing instrument system. According to a preferred embodiment, an elongated liquid-sensing probe having axially spaced electrodes adapted to sense liquid at multiple levels is arranged in each container of liquid. A controller, e.g. a suitably programmed microprocessor, operates to selectively poll different pairs of electrodes carried by the probe to determine whether or not the polled electrode pairs are immersed in the contained liquid. Preferably, the polling circuit comprises an electronically-controlled resistor that serves to normalize the level-sensing output signal for liquids of different bulk resistivity.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: October 2, 2007
    Assignee: Beckman Coulter, Inc.
    Inventors: Marco Zuleta, William W. Li, Elgardo Echevarria, Tan Nguyen, Rongchang Xin
  • Publication number: 20070183945
    Abstract: Method and apparatus for controlling the temperature of one or more reaction vessels in a bio-chemical analyzer comprises a heat-exchange block, preferably made of cast aluminum or the like, and a thermoelectric device for heating or cooling the block to within a desired temperature range. The heat-transfer block cradles one or more reaction vessels in a thermal energy-transferring relationship, and further supports, in a thermal energy-transferring relationship, one or more fluid conduits serving to transmit a liquid or gas to the interior of the reaction vessels. Preferably, the heat-transfer block is cast from aluminum, and the fluid conduits are disposed inside the casting.
    Type: Application
    Filed: February 7, 2006
    Publication date: August 9, 2007
    Applicant: Beckman Coulter, Inc.
    Inventors: William Li, Rongchang Xin, Wing Pang, Dobson Okawa
  • Publication number: 20070086923
    Abstract: A liquid transfer system for transferring liquid from a plurality of containers to a plurality of destinations comprises a plurality of inlet valves. Each inlet valve is operable between an open position allowing liquid from a container to be drawn into the system and a closed position blocking liquid from a container from being drawn into the system. Liquid drawn from each of the liquid containers is delivered to a buffer chamber designed to degas the liquid in the buffer chamber. The buffer chamber leads to a vented feeder chamber that is also adapted to retain a volume of liquid. A chamber connection valve is provided between the buffer chamber and the feeder chamber to allow or block the flow of liquid between the buffer chamber and the feeder chamber. The feeder chamber is connected to a plurality of distribution valves operable to deliver liquid to a plurality of destinations.
    Type: Application
    Filed: October 13, 2005
    Publication date: April 19, 2007
    Applicant: Beckman Coulter, Inc.
    Inventors: William Li, Rongchang Xin, Elgardo Echevarria, John Mitchell
  • Publication number: 20070079653
    Abstract: A method and apparatus for sensing different levels of liquids in their respective containers in a liquid-consuming and/or producing instrument system. According to a preferred embodiment, an elongated liquid-sensing probe having axially spaced electrodes adapted to sense liquid at multiple levels is arranged in each container of liquid. A controller, e.g. a suitably programmed microprocessor, operates to selectively poll different pairs of electrodes carried by the probe to determine whether or not the polled electrode pairs are immersed in the contained liquid. Preferably, the polling circuit comprises an electronically-controlled resistor that serves to normalize the level-sensing output signal for liquids of different bulk resistivity.
    Type: Application
    Filed: October 7, 2005
    Publication date: April 12, 2007
    Applicant: Beckman Coulter, Inc.
    Inventors: Marco Zuleta, William Li, Elgardo Echevarria, Tan Nguyen, Rongchang Xin
  • Publication number: 20060175359
    Abstract: A liquid aspiration device comprises an aspiration tube that slideably engages an opening in a cap such that a head on the end of the aspiration tube is moveable with respect to the opening in the cap. A tube cover is positioned between the opening in the cap and the head of the tube. The tube cover is operable to collapse into the cap when the head is moved into the cap. When the head and the tube cover are moved into the cap they are shielded from potential contamination that may occur when the aspiration device is moved from one container to the next. A lock is positioned in the cap. The lock is operable to move between an engaged position where the head may be retained within the cap and a disengaged position where the head is free to pass into or out of the cap.
    Type: Application
    Filed: February 7, 2005
    Publication date: August 10, 2006
    Applicant: Beckman Coulter, Inc.
    Inventors: Rongchang Xin, William Li
  • Patent number: 6823686
    Abstract: A pressure equalization method and system is provided for starting a compressor while maintaining the condenser at a high pressure and includes a valve and a bleed port. The compressor has a compressor inlet for receiving a fluid at a first pressure and a compressor outlet for discharging the fluid at a second pressure, and is operable to compress the fluid from the first pressure to the second pressure. The valve is proximate to and in fluid communication with the compressor outlet and is movable to an open position when the compressor is operating to permit the fluid at the second pressure to flow through the valve and is movable to a closed position when the compressor stops operating to prevent backflow of the fluid at the second pressure through the valve toward the compressor inlet. The bleed port is upstream of the valve and in fluid communication with the compressor inlet to equalize the pressure of the fluid contained in the compressor when the compressor stops operating.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: November 30, 2004
    Assignee: Bristol Compressors, Inc.
    Inventors: Eugene Chumley, Larry G. Pippin, Pantelis V. Hatzikazakis, William Z. Sun, Timothy M. Wampler, Charles E. Zimmerman, Rongchang Xin, David T. Monk
  • Publication number: 20040121484
    Abstract: A method for preparing a volume of blood for cellular analysis in a hematology instrument includes the step of gently mixing the blood sample with a reagent and/or diluent using a stream of air. Preferably, the air stream is directed at the liquid(s) to be mixed at a relatively steep angle, preferably less than about 10 degrees from the normal to the liquid surface. A mixing vessel adapted for use in a hematology instrument for carrying out the method of the invention comprises a cap that supports an air jet for directing the air stream at an angle in keeping with the method of the invention.
    Type: Application
    Filed: December 19, 2002
    Publication date: June 24, 2004
    Inventors: Tomas Betancourt, Santos E. Vargas, William Weigong Li, Rongchang Xin
  • Patent number: 6663358
    Abstract: A compressor for providing automatic capacity modulation is disclosed. The compressor comprises a compression chamber, a compressing member, a reexpansion area, a flow passage, a valve member, and a biasing member. The flow passage is in fluid communication with the compression chamber and the reexpansion area. In one position, the valve member permits flow through the flow passage and in a second position it prevents flow. The valve member is subjected to a first operating condition of fluid on one side and a second operating condition of the fluid on the other side. The biasing member exerts a biasing force on the valve member. When the first operating condition reaches a predetermined point relative to the second operating condition, the valve member moves and effects a change in the capacity of the compressor.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: December 16, 2003
    Assignee: Bristol Compressors, Inc.
    Inventors: Joe Frank Loprete, David Turner Monk, Eugene Karl Chumley, Tyrone Scott Simerly, John K. Narney, II, Mark Randall Trent, Panteleimon V. Hatzikazakis, Tom Evans Goodnight, Rongchang Xin, Robert Desmond Douglas
  • Publication number: 20020187057
    Abstract: A compressor for providing automatic capacity modulation is disclosed. The compressor comprises a compression chamber, a compressing member, a reexpansion area, a flow passage, a valve member, and a biasing member. The flow passage is in fluid communication with the compression chamber and the reexpansion area. In one position, the valve member permits flow through the flow passage and in a second position it prevents flow. The valve member is subjected to a first operating condition of fluid on one side and a second operating condition of the fluid on the other side. The biasing member exerts a biasing force on the valve member. When the first operating condition reaches a predetermined point relative to the second operating condition, the valve member moves and effects a change in the capacity of the compressor.
    Type: Application
    Filed: January 29, 2002
    Publication date: December 12, 2002
    Inventors: Joe Frank Loprete, David Turner Monk, Eugene Karl Chumley, Tyrone Scott Simerly, John K. Narney, Mark Randall Trent, Panteleimon V. Hatzikazakis, Tom Evans Goodnight, Rongchang Xin, Robert Desmond Douglas
  • Publication number: 20020178741
    Abstract: A pressure equalization method and system is provided for starting a compressor while maintaining the condenser at a high pressure and includes a valve and a bleed port. The compressor has a compressor inlet for receiving a fluid at a first pressure and a compressor outlet for discharging the fluid at a second pressure, and is operable to compress the fluid from the first pressure to the second pressure. The valve is proximate to and in fluid communication with the compressor outlet and is movable to an open position when the compressor is operating to permit the fluid at the second pressure to flow through the valve and is movable to a closed position when the compressor stops operating to prevent backflow of the fluid at the second pressure through the valve toward the compressor inlet. The bleed port is upstream of the valve and in fluid communication with the compressor inlet to equalize the pressure of the fluid contained in the compressor when the compressor stops operating.
    Type: Application
    Filed: July 12, 2002
    Publication date: December 5, 2002
    Applicant: Bristol Compressors, Inc.
    Inventors: Eugene Chumley, Larry G. Pippin, Pantelis V. Hatzikazakis, William Z. Sun, Timothy M. Wampler, Charles E. Zimmerman, Rongchang Xin, David T. Monk