Patents by Inventor Youfan Gu

Youfan Gu 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: 10809749
    Abstract: A temperature controller includes a microprocessor, a temperature detector, a current detector, a control relay and an external interface. Wherein, the temperature detector detects a working temperature of a heater; the current detector detects a current value passing through a heating element; and the microprocessor determines an operating state of the temperature controller (102) according to a temperature and a current value received from the temperature detector and the current detector, and sends a control signal to the control replay, thereby controlling the operation of the heater so as to adjust the temperature. By means of the temperature controller, current measurement is added while temperature measurement is performed, so that an operating state of a heater can be correctly determined, thereby greatly improving the reliability of the temperature controller.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: October 20, 2020
    Assignee: Jiangyin Huilong Electric Heating Appliance Co., Ltd.
    Inventors: Youfan Gu, Long Xie
  • Publication number: 20190138039
    Abstract: A heater alarm and control module includes a main processor of the heater alarm and control module, a heater alarm and control circuit, and a heater temperature controlling module. The heater temperature control module includes n heater temperature controllers. The main processor is connected to the heater temperature control module through the heater alarm and control circuit. The heater temperature controller includes an optically coupled solid-state relay including a light-emitting diode and a power switch; and a photocoupler including a light-emitting diode and a phototriode; and a microprocessor connected to the optically coupled solid-state relay and the photocoupler. The main processor provides a control signal to the heater temperature control module.
    Type: Application
    Filed: December 20, 2016
    Publication date: May 9, 2019
    Inventors: Youfan GU, Long XIE
  • Publication number: 20180373277
    Abstract: A temperature controller includes a microprocessor, a temperature detector, a current detector, a control relay and an external interface. Wherein, the temperature detector detects a working temperature of a heater; the current detector detects a current value passing through a heating element; and the microprocessor determines an operating state of the temperature controller (102) according to a temperature and a current value received from the temperature detector and the current detector, and sends a control signal to the control replay, thereby controlling the operation of the heater so as to adjust the temperature. By means of the temperature controller, current measurement is added while temperature measurement is performed, so that an operating state of a heater can be correctly determined, thereby greatly improving the reliability of the temperature controller.
    Type: Application
    Filed: December 20, 2016
    Publication date: December 27, 2018
    Inventors: Youfan GU, Long XIE
  • Patent number: 9314824
    Abstract: Powder and deposition control in a throttle valve includes nozzle inserts in the valve body that form annular plenums and annular nozzles for injecting annular flows of cleaning gas adjacent to the inside wall surface of the valve body for cleaning powders and depositions off surfaces in the valve body and off the closure member of the throttle valve. The annular flows of cleaning gas can be in intermittent, periodic, or in pulsed bursts or at a steady-state flow rates to dislodge powder particles stuck to the inside surface of the throttle valve, to etch or reactively clean solid deposits, or to prevent or minimize build-up of powder particles or solid deposits in the throttle valve.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: April 19, 2016
    Assignee: MKS Instruments, Inc.
    Inventors: Youfan Gu, Matthew C. Grout
  • Patent number: 9206919
    Abstract: An expandable and contractible shield around a bellows in a valve protects the bellows from corrosive gases and solid particles in the valve chamber. In a manifold valve assembly with multiple outlet ports and multiple valves in a common valve chamber, a respective expandable and contractible shield around each respective bellows of each respective valve in the assembly separates each bellows from corrosive gases and solid particles in the common valve chamber regardless of whether one or all of the valves in the assembly is opened or closed.
    Type: Grant
    Filed: October 23, 2013
    Date of Patent: December 8, 2015
    Assignee: MKS Instruments, Inc.
    Inventors: David Neumeister, Bradly Lefevre, Kevin Grout, Youfan Gu
  • Patent number: 9200711
    Abstract: A valve has a major valve closure member with a valve stem for opening and closing a major port in a valve chamber. An alternate flow path extends through the major valve closing member. Flow is controlled through the alternate flow path by directing a minor valve actuating fluid through the valve stem to apply pressure on a minor valve piston in the major valve closure member to move a minor valve closure member in the major valve closure member between a closed mode in which the minor valve closure member closes the alternate flow path and an opened mode in which the minor valve closure member opens the alternate flow path. The minor valve actuating fluid is sealed from the alternate flow path by a flexible diaphragm positioned between the minor valve actuating fluid and the minor valve piston, so the pressure of the minor valve actuating fluid is applied to the minor valve piston via the flexible diaphragm.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: December 1, 2015
    Assignee: MKS Instruments, Inc.
    Inventors: Youfan Gu, David Neumeister, Kevin Grout
  • Publication number: 20150129047
    Abstract: Powder and deposition control in a throttle valve includes nozzle inserts in the valve body that form annular plenums and annular nozzles for injecting annular flows of cleaning gas adjacent to the inside wall surface of the valve body for cleaning powders and depositions off surfaces in the valve body and off the closure member of the throttle valve. The annular flows of cleaning gas can be in intermittent, periodic, or in pulsed bursts or at a steady-state flow rates to dislodge powder particles stuck to the inside surface of the throttle valve, to etch or reactively clean solid deposits, or to prevent or minimize build-up of powder particles or solid deposits in the throttle valve.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 14, 2015
    Applicant: MKS INSTRUMENTS, INC.
    Inventors: Youfan Gu, Matthew C. Grout
  • Publication number: 20140130876
    Abstract: A valve has a major valve closure member with a valve stem for opening and closing a major port in a valve chamber. An alternate flow path extends through the major valve closing member. Flow is controlled through the alternate flow path by directing a minor valve actuating fluid through the valve stem to apply pressure on a minor valve piston in the major valve closure member to move a minor valve closure member in the major valve closure member between a closed mode in which the minor valve closure member closes the alternate flow path and an opened mode in which the minor valve closure member opens the alternate flow path. The minor valve actuating fluid is sealed from the alternate flow path by a flexible diaphragm positioned between the minor valve actuating fluid and the minor valve piston, so the pressure of the minor valve actuating fluid is applied to the minor valve piston via the flexible diaphragm.
    Type: Application
    Filed: January 23, 2014
    Publication date: May 15, 2014
    Applicant: MKS INSTRUMENTS, INC.
    Inventors: Youfan Gu, David Neumeister, Kevin Grout
  • Publication number: 20140109973
    Abstract: An expandable and contractible shield around a bellows in a valve protects the bellows from corrosive gases and solid particles in the valve chamber. In a manifold valve assembly with multiple outlet ports and multiple valves in a common valve chamber, a respective expandable and contractible shield around each respective bellows of each respective valve in the assembly separates each bellows from corrosive gases and solid particles in the common valve chamber regardless of whether one or all of the valves in the assembly is opened or closed.
    Type: Application
    Filed: October 23, 2013
    Publication date: April 24, 2014
    Applicant: MKS INSTRUMENTS, INC.
    Inventors: David Neumeister, Bradly Lefevre, Kevin Grout, Youfan Gu
  • Patent number: 8679287
    Abstract: A secondary reaction chamber with a mesh reactor element and a heater assembly are positioned in a foreline between a CVD reaction chamber and a vacuum pump to mix and react all previously unreacted precursor reactants to remove them from the effluent before they can reach and damage the vacuum pump.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: March 25, 2014
    Assignee: MKS Instruments, Inc.
    Inventors: Youfan Gu, David Neumeister
  • Patent number: 8671987
    Abstract: A two-stage, slow-start valve includes a minor valve assembly inside a major valve closure member of a major valve closure assembly so that fluid can flow through the valve at a higher rate by opening the major valve assembly or at a lower rate by opening the minor valve assembly while the major valve closure assembly is closed in order to allow fluid to flow in an alternate flow path through the major valve closure member. The example minor valve closure assembly has a minor valve closure member that is actuated to open by a minor valve piston on which minor valve actuating fluid is applied to the minor piston via a diaphragm seal positioned between the minor piston and the minor valve actuating fluid. Both the major valve closure assembly and the minor valve closure assembly can be pneumatically actuated to open.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: March 18, 2014
    Assignee: MKS Instruments, Inc.
    Inventors: Youfan Gu, David Neumeister, Kevin Grout
  • Patent number: 8541716
    Abstract: A multiple heater control system includes cables, connectors, and junction boxes for user-friendly daisy chain connections of heater controllers and heaters in various configurations or combinations of individually controlled heater series and/or master and slave heater series. The heater controllers include process control of AC power to the heaters and upper-limit safety shutoff that is substantially independent from the process control. The heater controllers also have variable levels of control, adjustment, display, and communications functionality in a base module that is expandable to various levels with expansion modules that are attachable to and detachable from the base module. Connector, cable, and junction configurations, adapters, and latch features enhance user friendliness.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: September 24, 2013
    Assignees: MKS Instruments, Inc, Watlow Electronic Manufacturing Company
    Inventors: Youfan Gu, Jeffrey D. Kiernan, Charles C. Lawhead, William C. Bohlinger, Eric E. Ellis, Curtis A. Foster, James P. Hentges, Mark Louis-Gilmer Hoven, James H. Kreisel, Shawn Leininger, Robert O. Moran, Kurt W. Peterson, Jason R. Powell, Dale T. Wolfe
  • Publication number: 20130146225
    Abstract: A plasma chamber for use with a reactive gas source that includes a first conduit comprising a wall, an inlet, an outlet, an inner and outer surface, and a plurality of openings through the wall, the inlet receives a first gas for generating a reactive gas in the first conduit with a plasma formed in the first conduit. The plasma chamber also includes a second conduit that includes a wall, an inlet, and an inner surface. The first conduit is disposed in the second conduit defining a channel between the outer surface of the first conduit and the inner surface of the second conduit. A second gas provided to the inlet of the second conduit flows along the channel and through the plurality of openings of the wall of the first conduit into the first conduit to surround the reactive gas and plasma in the first conduit.
    Type: Application
    Filed: December 8, 2011
    Publication date: June 13, 2013
    Applicant: MKS INSTRUMENTS, INC.
    Inventors: Xing Chen, Youfan Gu, Chengxiang Ji, Paul Ashby Loomis, Ilya Pokidov, Kevin Wayne Wenzel
  • Publication number: 20120153193
    Abstract: A two-stage, slow-start valve includes a minor valve assembly inside a major valve closure member of a major valve closure assembly so that fluid can flow through the valve at a higher rate by opening the major valve assembly or at a lower rate by opening the minor valve assembly while the major valve closure assembly is closed in order to allow fluid to flow in an alternate flow path through the major valve closure member. The example minor valve closure assembly has a minor valve closure member that is actuated to open by a minor valve piston on which minor valve actuating fluid is applied to the minor piston via a diaphragm seal positioned between the minor piston and the minor valve actuating fluid. Both the major valve closure assembly and the minor valve closure assembly can be pneumatically actuated to open.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 21, 2012
    Applicant: MKS INSTRUMENTS, INC.
    Inventors: Youfan Gu, David Neumeister, Kevin Grout
  • Patent number: 8172197
    Abstract: A fast-acting, pneumatic diaphragm valve includes a diaphragm valve closure member, a pneumatic piston that provides a closure force on the closure member, and a solenoid pilot valve that controls pressurized air to the piston to cause the piston to move in a reciprocal manner so that the closure member opens and closes the valve. The valve seat seal can be elastomer for enhancing speed, and the solenoid pilot valve can be positioned and configured with air flow longitudinally through or past the solenoid armature to enhance speed.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: May 8, 2012
    Assignee: MKS Instruments, Inc.
    Inventors: Youfan Gu, Sven Nuesken
  • Publication number: 20120061369
    Abstract: A multiple heater control system includes cables, connectors, and junction boxes for user-friendly daisy chain connections of heater controllers and heaters in various configurations or combinations of individually controlled heater series and/or master and slave heater series. The heater controllers include process control of AC power to the heaters and upper-limit safety shutoff that is substantially independent from the process control. The heater controllers also have variable levels of control, adjustment, display, and communications functionality in a base module that is expandable to various levels with expansion modules that are attachable to and detachable from the base module. Connector, cable, and junction configurations, adapters, and latch features enhance user friendliness.
    Type: Application
    Filed: March 15, 2011
    Publication date: March 15, 2012
    Applicants: WATLOW ELECTRONIC MANUFACTURING COMPANY, MKS INSTRUMENTS, INC.
    Inventors: Youfan Gu, Jeffrey D. Kiernan, Charles C. Lawhead, William C. Bohlinger, Eric E. Ellis, Curtis A. Foster, James P. Hentges, Mark Loius-Gilmer Hoven, James H. Kreisel, Shawn Leininger, Robert O. Moran, Kurt W. Peterson, Jason R. Powell, Dale T. Wolfe
  • Patent number: 7962294
    Abstract: A method and apparatus integrates differential pressure measurements and absolute pressure measurements to provide a continuous absolute pressure profile over a wide range of pressures on a single integrated scale. The absolute pressure measurements and differential pressure measurements are obtained, and a correlation factor between the absolute pressure measurements and the differential pressure measurements is determined. The correlation factor is used to normalize the differential pressure measurements to virtual absolute pressure values on a common absolute pressure scale with the absolute pressure measurements. An absolute pressure profile over a wide pressure range includes the absolute pressure measurements in a portion of the range where the absolute pressure measurements are accurate, and it includes the virtual absolute pressure values in another portion of the range where the differential pressure measurements are accurate.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: June 14, 2011
    Assignee: MKS Instruments, Inc
    Inventors: Paul Dozoretz, Youfan Gu, Garry Holcomb, Ole Wenzel
  • Patent number: 7932480
    Abstract: A multiple heater control system includes cables, connectors, and junction boxes for user-friendly daisy chain connections of heater controllers and heaters in various configurations or combinations of individually controlled heater series and/or master and slave heater series. The heater controllers include process control of AC power to the heaters and upper-limit safety shutoff that is substantially independent from the process control. The heater controllers also have variable levels of control, adjustment, display, and communications functionality in a base module that is expandable to various levels with expansion modules that are attachable to and detachable from the base module. Connector, cable, and junction configurations, adapters, and latch features enhance user friendliness.
    Type: Grant
    Filed: April 5, 2006
    Date of Patent: April 26, 2011
    Assignees: MKS Instruments, Inc., Watlow Electric Manufacturing Company
    Inventors: Youfan Gu, Jeffrey D. Kiernan, Charles C. Lawhead, William C. Bohlinger, Eric E. Ellis, Curtis A. Foster, James P. Hentges, Mark Louis-Gilmer Hoven, James H. Kreisel, Shawn Leininger, Robert O. Moran, Kurt W. Peterson, Jason R. Powell, Dale T. Wolfe
  • Patent number: 7871587
    Abstract: A small scale, but effective, reactive chemical containment system includes apparatus and methods for reaction of process gases exhausted from reaction furnaces with a reactant gas in a non-combustible manner to produce and contain particulate or powder byproducts, thereby removing the process gas from the exhaust gas flow. The apparatus provides process gas inlet, treatment reactive gas diffusion, process gas and treatment reactive gas pre-mixing, primary containment, secondary containment, and outlet zones.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: January 18, 2011
    Assignee: MKS Instruments, Inc.
    Inventors: Youfan Gu, Paul Dozoretz
  • Publication number: 20100166630
    Abstract: A small scale, but effective, reactive chemical containment system includes apparatus and methods for reaction of process gases exhausted from reaction furnaces with a reactant gas in a non-combustible manner to produce and contain particulate or powder byproducts, thereby removing the process gas from the exhaust gas flow. The apparatus provides process gas inlet, treatment reactive gas diffusion, process gas and treatment reactive gas pre-mixing, primary containment, secondary containment, and outlet zones.
    Type: Application
    Filed: December 22, 2009
    Publication date: July 1, 2010
    Applicant: MKS INSTRUMENTS, INC.
    Inventors: Youfan Gu, Paul Dozoretz