Patents by Inventor Steve Drummond

Steve Drummond 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: 20240344716
    Abstract: A water heating system is described. The water heating system comprises a vessel for holding water and for receiving heat from one or more heat sources for heating water in the vessel. The water heating system comprises a sensor comprising a plurality of temperature sensing elements for sensing a distribution of temperatures in the vessel. The water heating system comprises a connector for connecting the sensor to a retrofittable tank controller. The water heating system is configured to provide one or more characteristics of the water heating system to a retrofittable tank controller such that a retrofittable tank controller connected to the sensor and in receipt of the characteristics of the water heating system can determine from the distribution of temperatures in the vessel a quantity of useable heat stored in the vessel. A retrofittable tank controller for controlling a water heating system is also described. A sensor for measuring a temperature distribution of fluid within a vessel is also described.
    Type: Application
    Filed: June 30, 2022
    Publication date: October 17, 2024
    Applicant: Mixergy Limited
    Inventors: Peter ARMSTRONG, Steve DRUMMOND
  • Patent number: 9711324
    Abstract: An ion implantation system provides ions to a workpiece positioned in a process environment of a process chamber on a sub-ambient temperature chuck. An intermediate chamber having an intermediate environment is in fluid communication with an external environment and has a cooling station and heating station for cooling and heating the workpiece. A load lock chamber is provided between the process chamber and intermediate chamber to isolate the process environment from the intermediate environment. A positive pressure source provides a dry gas within the intermediate chamber at dew point that is less than a dew point of the external environment to the intermediate chamber. The positive pressure source isolates the intermediate environment from the external environment via a flow of the dry gas from the intermediate chamber to the external environment.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: July 18, 2017
    Assignee: Axcelis Technologies, Inc.
    Inventors: William D. Lee, Steve Drummond
  • Publication number: 20150228514
    Abstract: An electrostatic clamping system has an electrostatic chuck having one or more electrodes and a clamping surface and one or more fluid passages therethrough. A plurality of fluid sources has a respective plurality of fluids associated therewith, wherein each of the plurality of fluids are chemically distinct from one another and has a respective viable fluid temperature range associated therewith. A thermal unit is configured to heat and/or cool the plurality of fluids to one or more predetermined temperature setpoints. A valve assembly is configured to selectively fluidly couple each of the plurality of fluid sources to the one or more fluid passages of the electrostatic chuck. A controller is also configured to selectively fluidly couple the one or more fluid passages of the electrostatic chuck with a selected one or more of the plurality of fluid sources via a control of the valve assembly.
    Type: Application
    Filed: February 12, 2014
    Publication date: August 13, 2015
    Applicant: Axcelis Technologies, Inc.
    Inventors: William Davis Lee, Steve Drummond
  • Patent number: 8692215
    Abstract: A workpiece scanning system is provided having a scan arm that rotates about a first axis and a chilled end effector rotatably coupled to the scan arm about a second axis for selectively securing a workpiece. The chilled end effector has a clamping plate and one or more cooling mechanisms for cooling the clamping plate. A bearing is positioned along the second axis and rotatably couples the end effector to the scan arm, and a seal is positioned along the second axis to provide a pressure barrier between an external environment and an internal environment. One or more of the bearing and seal can have a ferrofluid associated therewith. A heater assembly is positioned proximate to the bearing and seal, wherein the heater assembly selectively provides a predetermined amount of heat to the bearing and seal, therein increasing a propensity of the end effector to rotate about the second axis.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: April 8, 2014
    Assignee: Axcelis Technologies, Inc.
    Inventors: William D. Lee, William DiVergilio, Steve Drummond
  • Publication number: 20130320208
    Abstract: An ion implantation system provides ions to a workpiece positioned in a process environment of a process chamber on a sub-ambient temperature chuck. An intermediate chamber having an intermediate environment is in fluid communication with an external environment and has a cooling station and heating station for cooling and heating the workpiece. A load lock chamber is provided between the process chamber and intermediate chamber to isolate the process environment from the intermediate environment. A positive pressure source provides a dry gas within the intermediate chamber at dew point that is less than a dew point of the external environment to the intermediate chamber. The positive pressure source isolates the intermediate environment from the external environment via a flow of the dry gas from the intermediate chamber to the external environment.
    Type: Application
    Filed: May 31, 2012
    Publication date: December 5, 2013
    Applicant: Axcelis Technologies, Inc.
    Inventors: William D. Lee, Steve Drummond
  • Publication number: 20110291023
    Abstract: A workpiece scanning system is provided having a scan arm that rotates about a first axis and a chilled end effector rotatably coupled to the scan arm about a second axis for selectively securing a workpiece. The chilled end effector has a clamping plate and one or more cooling mechanisms for cooling the clamping plate. A bearing is positioned along the second axis and rotatably couples the end effector to the scan arm, and a seal is positioned along the second axis to provide a pressure barrier between an external environment and an internal environment. One or more of the bearing and seal can have a ferrofluid associated therewith. A heater assembly is positioned proximate to the bearing and seal, wherein the heater assembly selectively provides a predetermined amount of heat to the bearing and seal, therein increasing a propensity of the end effector to rotate about the second axis.
    Type: Application
    Filed: May 26, 2011
    Publication date: December 1, 2011
    Applicant: Axcelis Technologies, Inc.
    Inventors: William D. Lee, William DiVergilio, Steve Drummond
  • Patent number: 7751172
    Abstract: The present invention is directed to a system and a method for peeling a wafer off of an electrostatic clamp (ESC). The ESC removal system comprises a electrostatic clamp and a wafer electrically coupled and physically in contact with each other. A plurality of grippers or pins are arranged with respect to the wafer and the ESC to allow the wafer to be peeled off or removed section by section from the electrostatic clamp. The system and method allow the wafer to be removed with a much lower pull force than current systems and methods.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: July 6, 2010
    Assignee: Axcelis Technologies, Inc.
    Inventors: Ashwin M. Purohit, Dale Stone, Dave Broyer, Steve Drummond
  • Publication number: 20080100983
    Abstract: The present invention is directed to a system and a method for peeling a wafer off of an electrostatic clamp (ESC). The ESC removal system comprises a electrostatic clamp and a wafer electrically coupled and physically in contact with each other. A plurality of grippers or pins are arranged with respect to the wafer and the ESC to allow the wafer to be peeled off or removed section by section from the electrostatic clamp. The system and method allow the wafer to be removed with a much lower pull force than current systems and methods.
    Type: Application
    Filed: October 18, 2006
    Publication date: May 1, 2008
    Inventors: Ashwin M. Purohit, Dale Stone, Dave Broyer, Steve Drummond