Patents by Inventor Lam T. Nguyen

Lam T. 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).

  • Self clearing conveyor
    Patent number: 5909799
    Abstract: The apparatus is a self clearing conveyor for materials which clump together. A rotating multi-faced drum is located above the moving surface of a conveyor and rotates in a direction opposite from the movement of the conveyor. Material which is higher than the adjustable clearance between the drum and the conveyor is thrown upstream on the conveyor to try again, even if the material is initially stuck to or entangled with material passing below the drum.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: June 8, 1999
    Assignee: Aggregates Equipment, Inc.
    Inventors: D. Leonard Stairs, Lam T. Nguyen
  • Increased capacity disc dryer
    Patent number: 5343635
    Abstract: An improved disc dryer for aggregate material which operates by rotating and impacting a tilted pan which holds the material being dried. Increased capacity is attained by transverse stabilizers on the impactor assembly, adjustable pressure air shock mounts for variable amplitude control of the impactor assembly, sets of dual support wheels upon which the pan rotates a reinforced support tract on the underside of the pan, and an adjustable feed box for supplying material to the pan at varying locations.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: September 6, 1994
    Assignee: Aggregates Equipment, Inc.
    Inventor: Lam T. Nguyen
  • Thermal mass flow sensor
    Patent number: 5279154
    Abstract: A vertical flow thermal mass flow sensor for a vertical flow thermal mass flow meter of a vertical flow thermal mass flow controller has a sensor tube having a gas inlet for receiving a gas to be metered. The sensor tube includes a first curved convection trap and a second curved convection trap for preventing convective flow of the gas through the sensor tube. A thermally responsive winding is wound about the sensor tube and is energized from a source of electrical energy. The resistance of the thermally responsive winding is responsive to the rate of flow of the gas through the sensor tube and provides an indication thereof.
    Type: Grant
    Filed: September 18, 1992
    Date of Patent: January 18, 1994
    Assignee: Unit Instruments, Inc.
    Inventors: Randall J. Vavra, Lam T. Nguyen, Erik Q. Tran
  • Increased capacity disc dryer
    Patent number: 5271165
    Abstract: An improved disc dryer for aggregate material which operates by rotating and impacting a tilted pan which holds the material being dried. Increased capacity is attained by transverse stabilizers on the impactor assembly, adjustable pressure air shock mounts for variable amplitude control of the impactor assembly, sets of dual support wheels upon which the pan rotates a reinforced support tract on the underside of the pan, and an adjustable feed box for supplying material to the pan at varying locations.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: December 21, 1993
    Assignee: Aggregates Equipment, Inc.
    Inventor: Lam T. Nguyen
  • Increased capacity disc dryer
    Patent number: 5131171
    Abstract: An improved disc dryer for aggregate material which operates by rotating and impacting a tilted pan which holds the material being dried. Increased capacity is attained by transverse stabilizers on the impactor assembly, adjustable pressure air shock mounts for variable amplitude control of the impactor assembly, sets of dual support wheels upon which the pan rotates a reinforced support tract on the underside of the pan, and an adjustable feed box for supplying material to the pan at varying locations.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: July 21, 1992
    Assignee: Aggregates Equipment, Inc.
    Inventor: Lam T. Nguyen