Vu D Nguyen

6554204, Apr 29, 2003

Oct 8, 1999

09/691916

Vu K. Nguyen - Brooklyn Park MN
Lawrence P. Jeutter - Minneapolis MN
Dennis J. Van Keulen - Rogers MN

Graco Inc. - Minneapolis MN

B05B 1502

239112, 239120, 239 71, 239304

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.

8066491, Nov 29, 2011

Jul 26, 2006

11/996410

Vu K. Nguyen - Brooklyn Park MN, US
David M. Behrens - Hopkins MN, US
Christopher M. Lange - New Brighton MN, US

Graco Minnesota Inc. - Minneapolis MN

F04B 49/00
F04B 49/06
G05D 13/10
F01L 25/08

417 12, 417 46, 417 53, 417 63, 91248, 137 50

An air operated pump () uses a magnet () mounted in the valve cup () of the air motor () and two reed sensors () mounted in the valve cover () to monitor the speed and position of the valve (). A solenoid () is mounted on the valve cover () and can be commanded to extend a plunger () into the valve cup () 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 () to monitor the solenoid movement.

20060144447, Jul 6, 2006

Nov 27, 2002

10/496427

David Pittman - Brooklyn Park MN, US
Vu Nguyen - Brooklyn Park MN, US

B67D 5/52

137565290

The controller of the plural component proportioner () 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 () has reached the desired amount of travel (given the resolution available) and using a valve () to shut off output of that pump until the other side has caught up. At pump changeover, the output valve for that pump () is shut off and the air motor () allowed to run until travel stops to account for cavitation, air entertainment, compressibility, or poor inlet check performance.

20070181595, Aug 9, 2007

Apr 14, 2005

10/599090

Theodore Stone - St. Louis Park MN, US
Wade Palashewski - Andover MN, US
Vu Nguyen - Brooklyn Park MN, US
Dennis Vankeulen - Rogers MN, US

B67B 7/00

222001000

The invention is for use with a plural component sequential metering system. In the method of the invention, after a selected number of doses have been dispensed, the system stops and calculates how many of those doses have fallen within a predetermined tolerance of the desired ratio between the two materials. If too many doses fall outside the tolerance, the dose size is decreased. This process is repeated until the appropriate number of doses fall within the desired tolerance.

20080199323, Aug 21, 2008

Jul 25, 2006

11/996402

Mark L. Bauck - Coon Rapids MN, US
Mark T. Weinberger - Mounds View MN, US
David M. Behrens - Hopkins MN, US
Vu K. Nguyen - Brooklyn Park MN, US
Christopher M. Lange - New Brighton MN, US
Wade D. Palashewski - Andover MN, US

F04B 35/02
F04B 49/02
F04B 9/12
F04B 49/00

417 63, 417375

An air operated pump uses a magnet mounted in the valve cup of the air motor and two reed sensors mounted in the valve cover to monitor the speed and position of the valve A solenoid is mounted on the valve cover and can be commanded to extend a plunger into the valve cup to stop valve movement and therefore the pump from running away. A magnetoresistive sensor is located in the center of the air motor to precisely monitor the piston position and with air valve sensors provides the input necessary for precise control and diagnostics of the pump and makes it suitable for metering and plural component application.

20110002793, Jan 6, 2011

Jul 6, 2009

12/498074

Mark L. Bauck - Coon Rapids MN, US
Mark T. Weinberger - Mounds View MN, US
Vu K. Nguyen - Brooklyn Park MN, US
Christopher M. Lange - New Brighton MN, US
Wade D. Palashewski - Andover MN, US
David M. Behrens - Hopkins MN, US

GRACO MINNESOTA INC. - Minneapolis MN

F04B 49/00

417 46

An air operated pump uses a magnet mounted in the valve cup of the air motor and two reed sensors mounted in the valve cover to monitor the speed and position of the valve A solenoid is mounted on the valve cover and can be commanded to extend a plunger into the valve cup to stop valve movement and therefore the pump from running away A magnetoresistive sensor is located in the center of the air motor to precisely monitor the piston position and with air valve sensors provides the input necessary for precise control and diagnostics of the pump and makes it suitable for metering and plural component application.

20180119691, May 3, 2018

Oct 6, 2017

15/727188

- Minneapolis MN, US
Vu K. Nguyen - Brooklyn Park MN, US
Paul F. Boschert - Minneapolis MN, US

F04B 49/06
G05D 16/20

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.

20150300335, Oct 22, 2015

Jun 23, 2015

14/747360

- Minneapolis MN, US
Mark T. Weinberger - Mounds View MN, US
Vu K. Nguyen - Brooklyn Park MN, US
Christopher M. Lange - Shoreview MN, US
Wade D. Palashewski - Andover MN, US
David M. Behrens - Hopkins MN, US

F04B 9/123
F04B 49/03
F04B 49/10

An air operated pump uses a magnet mounted in the valve cup of the air motor and two reed sensors mounted in the valve cover to monitor the speed and position of the valve A solenoid is mounted on the valve cover and can be commanded to extend a plunger into the valve cup to stop valve movement and therefore the pump from running away A magnetoresistive sensor is located in the center of the air motor to precisely monitor the piston position and with air valve sensors provides the input necessary for precise control and diagnostics of the pump and makes it suitable for metering and plural component application.