Patents by Inventor Bac Ta

Bac Ta 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).

  • Fuel injector
    Patent number: 5381965
    Abstract: Fuel injector has combination valve-armature fabricated by laser welding relatively more magnetically permeable armature element to relatively less magnetically permeable valve element. Valve element contains sealing ring and landing ring, the latter being circumferentially discontinuous because of fuel passage holes through the valve element, the former being non-symmetrical so that magnetic opening force causes valve-armature to open by tilting about consistent circumferential location on valve element. Initial opening tilting motion is stopped by corrugated stop surface of annular stop member with final tilting motion occurring about the corrugated stop surface until the full perimeter of the valve element abuts the full perimeter of the corrugated stop surface. Actuator has bobbin-mounted coil inserted into frame and encapsulated by outer plastic body.
    Type: Grant
    Filed: January 3, 1994
    Date of Patent: January 17, 1995
    Assignees: Siemens Automotive L.P., Ford Motor Company
    Inventors: Michael W. Chabon, Bruce J. Harvey, Thomas A. Lahnala, Hans J. Sailer, Bac Ta, Christopher J. Treusch
  • Fuel injector
    Patent number: 5372313
    Abstract: Fuel injector has combination valve-armature fabricated by laser welding relatively more magnetically permeable armature element to relatively less magnetically permeable valve element. Valve element contains sealing ring and landing ring, the latter being circumferentially discontinuous because of fuel passage holes through the valve element, the former being non-symmetrical so that magnetic opening force causes valve-armature to open by tilting about consistent circumferential location on valve element. Initial opening tilting motion is stopped by corrugated stop surface of annular stop member with final tilting motion occurring about the corrugated stop surface until the full perimeter of the valve element abuts the full perimeter of the corrugated stop surface. Actuator has bobbin-mounted coil inserted into frame and encapsulated by outer plastic body.
    Type: Grant
    Filed: January 3, 1994
    Date of Patent: December 13, 1994
    Assignees: Siemens Automotive L.P., Ford Motor Company
    Inventors: Michael W. Chabon, Bruce J. Harvey, Thomas A. Lahnala, Hans J. Sailer, Bac Ta, Christopher J. Treusch