Patents by Inventor David A. Simpson

David A. Simpson 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: 20250025882
    Abstract: Described herein are systems and methods used for washing needle assemblies with multiple needles.
    Type: Application
    Filed: October 4, 2024
    Publication date: January 23, 2025
    Applicant: Waters Technologies Corporation
    Inventors: Rose Solow, David A. Simpson, Colin F. Fredette, Marc E. Lemelin, Joshua A. Burnett
  • Patent number: 12121891
    Abstract: Described herein are systems and methods used for washing needle assemblies with multiple needles.
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: October 22, 2024
    Assignee: Waters Technologies Corporation
    Inventors: Rose Solow, David A. Simpson, Colin F. Fredette, Marc E. Lemelin, Joshua A. Burnett
  • Publication number: 20240201142
    Abstract: A liquid chromatography sample manager includes a thermal chamber, a sample platter mounted in the thermal chamber, and a needle drive including a base having a shaft configured to rotate about a vertical axis, the base attachable to an interior of a sample manager of a liquid chromatography system. The needle drive further includes a needle assembly attached to the base, the needle assembly including a sample needle, and a drive system attached to the base, the drive system including a sample needle motor configured to impart vertical movement of the sample needle. The liquid chromatography sample manager further includes a sample delivery system configured to transfer a first sample from a first sample vial carrier located in the sample platter into a chromatographic flow stream.
    Type: Application
    Filed: February 26, 2024
    Publication date: June 20, 2024
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson, Marc E. Lemelin
  • Patent number: 11913916
    Abstract: A liquid chromatography sample manager includes a thermal chamber, a sample platter mounted in the thermal chamber, and a needle drive including a base having a shaft configured to rotate about a vertical axis, the base attachable to an interior of a sample manager of a liquid chromatography system. The needle drive further includes a needle assembly attached to the base, the needle assembly including a sample needle, and a drive system attached to the base, the drive system including a sample needle motor configured to impart vertical movement of the sample needle. The liquid chromatography sample manager further includes a sample delivery system configured to transfer a first sample from a first sample vial carrier located in the sample platter into a chromatographic flow stream.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: February 27, 2024
    Assignee: Waters Technologies Corporation
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson, Marc E. Lemelin
  • Publication number: 20240060939
    Abstract: A method and a fluidic network for acquiring and injecting a chromatographic sample into a chromatography system flow include a metering pump module, a sample needle, a needle seal and an injection valve. The metering pump module includes a metering pump and a pressure transducer in serial fluidic communication. When the injection valve is in a first valve state, the injection valve is configured to fluidically terminate ports of the metering pump module. When the injection valve is in a second valve state, the injection valve is configured to fluidically couple a fluidic path that includes the metering pump module and sample needle into the system flow of a chromatography system without resulting in a substantial change in the pressure of the system flow.
    Type: Application
    Filed: October 30, 2023
    Publication date: February 22, 2024
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson
  • Patent number: 11879875
    Abstract: A liquid chromatography sample manager includes a sampling mechanism; a sample platter mounted in the sampling mechanism, the sample platter configured to rotate about a first vertical axis; a needle arm mounted within the sampling mechanism, the needle arm configured to rotate about a second vertical axis; and a sample delivery system in fluidic communication with solvent delivery system, the sample delivery system including a sample needle attached to the needle arm, the sample delivery system configured to transfer a first sample from a first sample vial carrier located in the sample platter into a chromatographic flow stream.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: January 23, 2024
    Assignee: WATERS TECHNOLOGIES CORPORATION
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson, Marc E. Lemelin
  • Patent number: 11835496
    Abstract: A method and a fluidic network for acquiring and injecting a chromatographic sample into a chromatography system flow include a metering pump module, a sample needle, a needle seal and an injection valve. The metering pump module includes a metering pump and a pressure transducer in serial fluidic communication. When the injection valve is in a first valve state, the injection valve is configured to fluidically terminate ports of the metering pump module. When the injection valve is in a second valve state, the injection valve is configured to fluidically couple a fluidic path that includes the metering pump module and sample needle into the system flow of a chromatography system without resulting in a substantial change in the pressure of the system flow.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: December 5, 2023
    Assignee: Waters Technologies Corporation
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson
  • Patent number: 11774415
    Abstract: Described is a metering pump that may be used to meter volumes of sample in a chromatography system. The metering pump has a modular configuration that allows for separation of a head pod from a drive assembly for easy serviceability. The head pod includes a pump head, cartridge housing, seal wash housing and plunger. The drive assembly can be implemented in an inline drive configuration. Alternatively, the drive assembly can be implemented in an offset drive configuration in which a stepper motor is displaced laterally from other drive assembly components but is coupled through a belt and pulley system.
    Type: Grant
    Filed: March 25, 2021
    Date of Patent: October 3, 2023
    Assignee: WATERS TECHNOLOGIES CORPORATION
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson, Peter Osswald, John M. Auclair, Michael LeBeau
  • Patent number: 11555804
    Abstract: A liquid chromatography system including a solvent delivery system, a sample delivery system in fluidic communication with solvent delivery system, a liquid chromatography column located downstream from the solvent delivery system and the sample delivery system, a detector located downstream from the liquid chromatography column, a thermal chamber housing at least one of the solvent delivery system, the sample delivery system, the liquid chromatography column and the detector, an engine configured to control the temperature in the thermal chamber, a heatsink operably connected to the engine, a first temperature sensor in the thermal chamber, a second temperature sensor, and a computer system configured to receive temperature information from each of the first and second temperature sensors, and implement a method for controlling temperature in the thermal chamber.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: January 17, 2023
    Assignee: WATERS TECHNOLOGIES CORPORATION
    Inventors: David A. Simpson, Cameron Chaput, Miguel M. Soares
  • Publication number: 20220048035
    Abstract: Described herein are systems and methods used for washing needle assemblies with multiple needles.
    Type: Application
    Filed: August 16, 2021
    Publication date: February 17, 2022
    Applicant: Waters Technologies Corporation
    Inventors: Rose Solow, David A. Simpson, Colin F. Fredette, Marc E. Lemelin, Joshua A. Burnett
  • Patent number: 11162923
    Abstract: A twist-lock compliant needle including a housing component surrounding a needle holder holding a rigidly mounted needle, the housing component including a biasing element disposed therein, wherein the biasing element compresses as a needle tip of the needle contacts a surface is provided. An associated method is also provided.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: November 2, 2021
    Assignee: WATERS TECHNOLOGIES CORPORATION
    Inventors: David A. Simpson, Joshua A. Burnett, John M. Auclair
  • Publication number: 20210302397
    Abstract: Described is a metering pump that may be used to meter volumes of sample in a chromatography system. The metering pump has a modular configuration that allows for separation of a head pod from a drive assembly for easy serviceability. The head pod includes a pump head, cartridge housing, seal wash housing and plunger. The drive assembly can be implemented in an inline drive configuration. Alternatively, the drive assembly can be implemented in an offset drive configuration in which a stepper motor is displaced laterally from other drive assembly components but is coupled through a belt and pulley system.
    Type: Application
    Filed: March 25, 2021
    Publication date: September 30, 2021
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson, Peter Osswald, John M. Auclair, Michael LeBeau
  • Publication number: 20210293761
    Abstract: A liquid chromatography sample manager includes a sampling mechanism; a sample platter mounted in the sampling mechanism, the sample platter configured to rotate about a first vertical axis; a needle arm mounted within the sampling mechanism, the needle arm configured to rotate about a second vertical axis; and a sample delivery system in fluidic communication with solvent delivery system, the sample delivery system including a sample needle attached to the needle arm, the sample delivery system configured to transfer a first sample from a first sample vial carrier located in the sample platter into a chromatographic flow stream.
    Type: Application
    Filed: March 16, 2021
    Publication date: September 23, 2021
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson, Marc E. Lemelin
  • Publication number: 20210293762
    Abstract: A liquid chromatography sample manager includes a thermal chamber, a sample platter mounted in the thermal chamber, and a needle drive including a base having a shaft configured to rotate about a vertical axis, the base attachable to an interior of a sample manager of a liquid chromatography system. The needle drive further includes a needle assembly attached to the base, the needle assembly including a sample needle, and a drive system attached to the base, the drive system including a sample needle motor configured to impart vertical movement of the sample needle. The liquid chromatography sample manager further includes a sample delivery system configured to transfer a first sample from a first sample vial carrier located in the sample platter into a chromatographic flow stream.
    Type: Application
    Filed: March 16, 2021
    Publication date: September 23, 2021
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson, Marc E. Lemelin
  • Publication number: 20210190734
    Abstract: Described are a method and a fluidic network for acquiring and injecting a chromatographic sample into a chromatography system flow. The fluidic network includes a metering pump module, a sample needle, a needle seal and an injection valve. The metering pump module includes a metering pump and a pressure transducer in serial fluidic communication. When the injection valve is in a first valve state, the injection valve is configured to fluidically terminate ports of the metering pump module. When the injection valve is in a second valve state, the injection valve is configured to fluidically couple a fluidic path that includes the metering pump module and sample needle into the system flow of a chromatography system without resulting in a substantial change in the pressure of the system flow.
    Type: Application
    Filed: December 18, 2020
    Publication date: June 24, 2021
    Inventors: Joshua A. Burnett, Rose Solow, David A. Simpson
  • Patent number: 11002713
    Abstract: A liquid chromatography sample organizer includes a first chamber, a plurality of stacked sample organizer shelves mounted within the first chamber each individually configured to store a sample-vial carrier including a sample, and a shelf magnet affixed to a surface of each of the plurality of stacked sample organizer shelves. A portion of the first chamber is configured to be located adjacent to, and open to, a sample manager configured to inject liquid chromatography samples into a chromatographic flow stream. Disclosed further is a liquid chromatography system having the sample organizer, a sample drawer, and a method of transferring samples between a sample manager and the sample organizer.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: May 11, 2021
    Assignee: WATERS TECHNOLOGIES CORPORATION
    Inventors: David A. Simpson, Joshua A. Burnett, Marc E. Lemelin, Paul Keenan, Peter Osswald
  • Publication number: 20200025724
    Abstract: A liquid chromatography system including a solvent delivery system, a sample delivery system in fluidic communication with solvent delivery system, a liquid chromatography column located downstream from the solvent delivery system and the sample delivery system, a detector located downstream from the liquid chromatography column, a thermal chamber housing at least one of the solvent delivery system, the sample delivery system, the liquid chromatography column and the detector, an engine configured to control the temperature in the thermal chamber, a heatsink operably connected to the engine, a first temperature sensor in the thermal chamber, a second temperature sensor, and a computer system configured to receive temperature information from each of the first and second temperature sensors, and implement a method for controlling temperature in the thermal chamber.
    Type: Application
    Filed: July 19, 2019
    Publication date: January 23, 2020
    Inventors: David A. Simpson, Cameron Chaput, Miguel M. Soares
  • Publication number: 20200025722
    Abstract: A twist-lock compliant needle including a housing component surrounding a needle holder holding a rigidly mounted needle, the housing component including a biasing element disposed therein, wherein the biasing element compresses as a needle tip of the needle contacts a surface is provided. An associated method is also provided.
    Type: Application
    Filed: July 16, 2019
    Publication date: January 23, 2020
    Inventors: David A. Simpson, Joshua A. Burnett, John M. Auclair
  • Publication number: 20190383776
    Abstract: A liquid chromatography sample organizer includes a first chamber, a plurality of stacked sample organizer shelves mounted within the first chamber each individually configured to store a sample-vial carrier including a sample, and a shelf magnet affixed to a surface of each of the plurality of stacked sample organizer shelves. A portion of the first chamber is configured to be located adjacent to, and open to, a sample manager configured to inject liquid chromatography samples into a chromatographic flow stream. Disclosed further is a liquid chromatography system having the sample organizer, a sample drawer, and a method of transferring samples between a sample manager and the sample organizer.
    Type: Application
    Filed: June 12, 2019
    Publication date: December 19, 2019
    Inventors: David A. Simpson, Joshua A. Burnett, Marc E. Lemelin
  • Patent number: 9267130
    Abstract: Polypeptides having nucleic acid binding activity are provided. Methods of using polypeptides having nucleic acid binding activity are provided. Fusion proteins and methods of using fusion proteins are provided. Fusion proteins comprising a polymerase and a nucleic acid binding polypeptide are provided. Fusion proteins comprising a reverse transcriptase and a nucleic acid binding polypeptide are provided. Methods are provided for amplifying a nucleic acid sequence using a fusion protein comprising a nucleic acid binding polypeptide and a polymerase. Methods are provided for amplifying a nucleic acid sequence using a fusion protein comprising a nucleic acid binding polypeptide and a reverse transcriptase.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: February 23, 2016
    Assignee: APPLIED BIOSYSTEMS, LLC
    Inventors: Patrick K. Martin, David A. Simpson, Christine D. Hardy