Patents by Inventor Vu K. Nguyen
Vu K. Nguyen 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).
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Patent number: 11679395Abstract: Apparatus and associated methods related to providing safe electrical control and/or communication between a remote controller located in a safe location and interface system for a machine located in a hazardous location. The control and/or communication is provided via industrial-voltage power lines that traverse a barrier separating the safe location from the hazardous location. Control and/or communication is provided by reactively coupling to industrial power lines, which traverse the barrier, so as to superimpose a control and/or communication signal upon AC operating power provided to the machine. Each of the interface system located at the hazardous location and the remote control module located at a safe location provides such reactive coupling to the industrial-voltage power lines so as to communicate therebetween.Type: GrantFiled: October 22, 2020Date of Patent: June 20, 2023Assignee: GRACO MINNESOTA INC.Inventors: Vu K. Nguyen, Tom Herbert
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Publication number: 20210172435Abstract: A regulator pump provides disconnects an inflow from an outflow, such that a downstream pressure is unaffected by an upstream pressure. The regulator pump receives a fluid through an input valve, while an output valve remains in a closed position. The fluid continues to flow to the regulator pump until the regulator pump is full. With the regulator pump filled with the fluid, the inlet valve shifts to a closed position, thereby isolating the regulator pump chamber from the fluid source. The regulator pump drives the fluid downstream to an applicator with the inlet valve closed. The regulator pump fully isolates the upstream fluid from the downstream fluid such that the upstream pressure has no effect on the downstream pressure.Type: ApplicationFiled: February 17, 2021Publication date: June 10, 2021Inventors: Todd A. Anderson, Vu K. Nguyen, Paul F. Boschert
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Publication number: 20210121895Abstract: Apparatus and associated methods related to providing safe electrical control and/or communication between a remote controller located in a safe location and interface system for a machine located in a hazardous location. The control and/or communication is provided via industrial-voltage power lines that traverse a barrier separating the safe location from the hazardous location. Control and/or communication is provided by reactively coupling to industrial power lines, which traverse the barrier, so as to superimpose a control and/or communication signal upon AC operating power provided to the machine. Each of the interface system located at the hazardous location and the remote control module located at a safe location provides such reactive coupling to the industrial-voltage power lines so as to communicate therebetween.Type: ApplicationFiled: October 22, 2020Publication date: April 29, 2021Inventors: Vu K. Nguyen, Tom Herbert
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Publication number: 20180119691Abstract: A regulator pump provides disconnects an inflow from an outflow, such that a downstream pressure is unaffected by an upstream pressure. The regulator pump receives a fluid through an input valve, while an output valve remains in a closed position. The fluid continues to flow to the regulator pump until the regulator pump is full. With the regulator pump filled with the fluid, the inlet valve shifts to a closed position, thereby isolating the regulator pump chamber from the fluid source. The regulator pump drives the fluid downstream to an applicator with the inlet valve closed. The regulator pump fully isolates the upstream fluid from the downstream fluid such that the upstream pressure has no effect on the downstream pressure.Type: ApplicationFiled: October 6, 2017Publication date: May 3, 2018Inventors: Todd A. Anderson, Vu K. Nguyen, Paul F. Boschert
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Patent number: 9677550Abstract: An air operated pump 10 uses a magnet 14 mounted in the valve cup 16 of the air motor 18 and two reed sensors 20 mounted in the valve cover 22 to monitor the speed and position of the valve 16. A solenoid 24 is mounted on the valve cover 22 and can be commanded to extend a plunger 26 into the valve cup 16 to stop valve movement and therefore the pump from running away A magnetoresistive sensor 34 is located in the center of the air motor 18 to precisely monitor the piston 36 position and with air valve sensors 20 provides the input necessary for precise control and diagnostics of the pump 10 and makes it suitable for metering and plural component application.Type: GrantFiled: June 23, 2015Date of Patent: June 13, 2017Assignee: Graco Minnesota Inc.Inventors: Mark L. Bauck, Mark T. Weinberger, Vu K. Nguyen, Christopher M. Lange, Wade D. Palashewski, David M. Behrens
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Patent number: 9677549Abstract: An air operated pump 10 uses a magnet 14 mounted in the valve cup 16 of the air motor 18 and two reed sensors 20 mounted in the valve cover 22 to monitor the speed and position of the valve 16. A solenoid 24 is mounted on the valve cover 22 and can be commanded to extend a plunger 26 into the valve cup 16 to stop valve movement and therefore the pump from running away A magnetoresistive sensor 34 is located in the center of the air motor 18 to precisely monitor the piston 36 position and with air valve sensors 20 provides the input necessary for precise control and diagnostics of the pump 10 and makes it suitable for metering and plural component application.Type: GrantFiled: July 6, 2009Date of Patent: June 13, 2017Assignee: Graco Minnesota Inc.Inventors: Mark L. Bauck, Mark T. Weinberger, Vu K. Nguyen, Christopher M. Lange, Wade D. Palashewski, David M. Behrens
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Publication number: 20150300335Abstract: An air operated pump 10 uses a magnet 14 mounted in the valve cup 16 of the air motor 18 and two reed sensors 20 mounted in the valve cover 22 to monitor the speed and position of the valve 16. A solenoid 24 is mounted on the valve cover 22 and can be commanded to extend a plunger 26 into the valve cup 16 to stop valve movement and therefore the pump from running away A magnetoresistive sensor 34 is located in the center of the air motor 18 to precisely monitor the piston 36 position and with air valve sensors 20 provides the input necessary for precise control and diagnostics of the pump 10 and makes it suitable for metering and plural component application.Type: ApplicationFiled: June 23, 2015Publication date: October 22, 2015Inventors: Mark L. Bauck, Mark T. Weinberger, Vu K. Nguyen, Christopher M. Lange, Wade D. Palashewski, David M. Behrens
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Patent number: 8851111Abstract: The controller of the plural component proportioner (10) dispenses both components (or all three if a three component material) simultaneously (at least initially) and maintains ratio at the end of each predetermined volume of material by determining which component pump (12) has reached the desired amount of travel (given the resolution available) and using a valve (16) to shut off output of that pump until the other side has caught up. At pump changeover, the output valve for that pump (12) is shut off and the air motor (12a) allowed to run until travel stops to account for cavitation, air entrainment, compressibility, or poor inlet check performance.Type: GrantFiled: November 27, 2002Date of Patent: October 7, 2014Assignee: Graco Inc.Inventors: David M. Pittman, Vu K. Nguyen
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Patent number: 8066491Abstract: An air operated pump (10) uses a magnet (14) mounted in the valve cup (16) of the air motor (18) and two reed sensors (20) mounted in the valve cover (22) to monitor the speed and position of the valve (16). A solenoid (24) is mounted on the valve cover (22) and can be commanded to extend a plunger (26) into the valve cup (16) to stop valve movement and therefore the pump from running away. Three methods may be used to increase battery life and monitor the solenoid plunger position, two of which use the changing inductance of the solenoid (24) to monitor the solenoid movement.Type: GrantFiled: July 26, 2006Date of Patent: November 29, 2011Assignee: Graco Minnesota Inc.Inventors: Vu K. Nguyen, David M. Behrens, Christopher M. Lange
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Publication number: 20110002793Abstract: An air operated pump 10 uses a magnet 14 mounted in the valve cup 16 of the air motor 18 and two reed sensors 20 mounted in the valve cover 22 to monitor the speed and position of the valve 16. A solenoid 24 is mounted on the valve cover 22 and can be commanded to extend a plunger 26 into the valve cup 16 to stop valve movement and therefore the pump from running away A magnetoresistive sensor 34 is located in the center of the air motor 18 to precisely monitor the piston 36 position and with air valve sensors 20 provides the input necessary for precise control and diagnostics of the pump 10 and makes it suitable for metering and plural component application.Type: ApplicationFiled: July 6, 2009Publication date: January 6, 2011Applicant: GRACO MINNESOTA INC.Inventors: Mark L. Bauck, Mark T. Weinberger, Vu K. Nguyen, Christopher M. Lange, Wade D. Palashewski, David M. Behrens
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Publication number: 20080206066Abstract: An air operated pump (10) uses a magnet (14) mounted in the valve cup (16) of the air motor (18) and two reed sensors (20) mounted in the valve cover (22) to monitor the speed and position of the valve (16). A solenoid (24) is mounted on the valve cover (22) and can be commanded to extend a plunger (26) into the valve cup (16) to stop valve movement and therefore the pump from running away. Three methods may be used to increase battery life and monitor the solenoid plunger position, two of which use the changing inductance of the solenoid (24) to monitor the solenoid movement.Type: ApplicationFiled: July 26, 2006Publication date: August 28, 2008Inventors: Vu K. Nguyen, David M. Behrens, Christopher M. Lange
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Publication number: 20080199323Abstract: An air operated pump 10 uses a magnet 14 mounted in the valve cup 16 of the air motor 18 and two reed sensors 20 mounted in the valve cover 22 to monitor the speed and position of the valve 16. A solenoid 24 is mounted on the valve cover 22 and can be commanded to extend a plunger 26 into the valve cup 16 to stop valve movement and therefore the pump from running away. A magnetoresistive sensor 34 is located in the center of the air motor 18 to precisely monitor the piston 36 position and with air valve sensors 20 provides the input necessary for precise control and diagnostics of the pump 10 and makes it suitable for metering and plural component application.Type: ApplicationFiled: July 25, 2006Publication date: August 21, 2008Inventors: Mark L. Bauck, Mark T. Weinberger, David M. Behrens, Vu K. Nguyen, Christopher M. Lange, Wade D. Palashewski
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Patent number: 6554204Abstract: A gun flush box is controlled by a plural component proportioning unit. When a color change is desired, the operator places the spray gun in the flush box. When a new color is selected, the control system automatically triggers the gun and flushes the gun with solvent with the flush material safely routed to a waste container. The control system automatically triggers the gun to refill the lines with new color paint without using excess paint as it displaces the flush solvent. This system is also capable of working with two guns in operation.Type: GrantFiled: October 8, 1999Date of Patent: April 29, 2003Assignee: Graco Inc.Inventors: Vu K. Nguyen, Lawrence P. Jeutter, Dennis J. Van Keulen