Patents by Inventor Keith B. Fong

Keith B. Fong 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).

  • Plunger assembly having a preset spring force pre-load
    Patent number: 6668639
    Abstract: A uniformly preset spring force pre-load among a number of identical solenoid actuated valve assemblies (28) by uniquely adjusting the spring pocket length (L) of each respective plunger (12) to accommodate a respective spring (20) which is uniquely mated thereto. This adjustment is accomplished using a two-component plunger (12) consisting of a plunger body (14) having a central bore (22) and a rod (18) slidably located within the central bore. The rod (18) is press-fit into the central bore (22), and the spring pocket includes a portion of the central bore unoccupied by the rod. By pressing the rod (18) a selected distance into the central bore (22), a precisely set spring pocket is obtained which is uniquely correct for a selected spring (20), in that the selected spring is compressed to a precisely preset spring force pre-load.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: December 30, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Keith B. Fong, Veronica Morales, Jeffrey Alan Heinrichs, Javier Gomez, Omar Rocha
  • Plunger assembly having a preset spring force pre-load
    Patent number: 6409145
    Abstract: A uniformly preset spring force pre-load among a number of identical solenoid actuated valve assemblies (28) by uniquely adjusting the spring pocket length (L) of each respective plunger (12) to accommodate a respective spring (20) which is uniquely mated thereto. This adjustment is accomplished using a two-component plunger (12) consisting of a plunger body (14) having a central bore (22) and a rod (18) slidably located within the central bore. The rod (18) is press-fit into the central bore (22), and the spring pocket includes a portion of the central bore unoccupied by the rod. By pressing the rod (18) a selected distance into the central bore (22), a precisely set spring pocket is obtained which is uniquely correct for a selected spring (20), in that the selected spring is compressed to a precisely preset spring force pre-load.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: June 25, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Keith B. Fong, Veronica Morales, Jeffrey Alan Heinrichs, Javier Gomez, Omar Rocha
  • Plunger assembly having a preset spring force pre-load
    Publication number: 20020026827
    Abstract: A uniformly preset spring force pre-load among a number of identical solenoid actuated valve assemblies (28) by uniquely adjusting the spring pocket length (L) of each respective plunger (12) to accommodate a respective spring (20) which is uniquely mated thereto. This adjustment is accomplished using a two-component plunger (12) consisting of a plunger body (14) having a central bore (22) and a rod (18) sidably located within the central bore. The rod (18) is press-fit into the central bore (22), and the spring pocket includes a portion of the central bore unoccupied by the rod. By pressing the rod (18) a selected distance into the central bore (22), a precisely set spring pocket is obtained which is uniquely correct for a selected spring (20), in that the selected spring is compressed to a precisely preset spring force pre-load.
    Type: Application
    Filed: August 14, 2001
    Publication date: March 7, 2002
    Applicant: DELPHI TECHNOLOGIES INC.
    Inventors: Keith B. Fong, Veronica Morales, Jeffrey Alan Heinrichs, Javier Gomez, Omar Rocha
  • Two-position, three-way solenoid-actuated valve
    Patent number: 6065495
    Abstract: A two-position, three-way solenoid-actuated valve includes a valve assembly having an axial opening and a valve member fixed in the axial opening with a first valve seat and a second valve seat disposed in the axial opening. The valve assembly including a ball disposed in the axial opening and moveable between the first valve seat and the second valve seat. The two-position, three-way solenoid-actuated valve also includes an electromagnetic coil assembly engaging the valve assembly to move the ball between the first valve seat and the second valve seat to open and close a fluid path through the valve assembly to provide directional flow control.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: May 23, 2000
    Assignee: General Motors Corporation
    Inventors: Keith B. Fong, David Fredrick Reuter, Viswanath Seetharaman, Dale Lee Baldauf