Patents by Inventor Helen Hong Yan

Helen Hong Yan 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).

  • Electromagnetic shutter
    Patent number: 8651754
    Abstract: A shutter includes a driver ring, a plurality of shutter blades coupled to the drive ring such that movement of the drive ring transitions the plurality of shutter blades between an open position exposing a central aperture of the shutter, and a closed position blocking the central aperture, and a first stop and a second stop movable relative to the first stop. At least one of the first and second stops limits travel of the shutter blades.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: February 18, 2014
    Assignee: VA, Inc.
    Inventors: David Viglione, Stephen T. Pasquarella, David Michael Krieger, Helen Hong Yan
  • ELECTROMAGNETIC SHUTTER
    Publication number: 20120321292
    Abstract: A shutter includes a driver ring, a plurality of shutter blades coupled to the drive ring such that movement of the drive ring transitions the plurality of shutter blades between an open position exposing a central aperture of the shutter, and a closed position blocking the central aperture, and a first stop and a second stop movable relative to the first stop. At least one of the first and second stops limits travel of the shutter blades.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 20, 2012
    Inventors: David Viglione, Stephen T. Pasquarella, David Michael Krieger, Helen Hong Yan
  • Shutter damping assembly
    Patent number: 8317417
    Abstract: A rotary photographic shutter includes a base plate, a rotating ring, a plurality of shutter blades pivotally connected to the base plate, and moveable between an open position and a closed position in response to rotation of the ring, and an actuation assembly connected to the base plate, the actuation assembly includes a drive arm operable to selectively rotate the ring. The exemplary rotary photographic shutter also includes a bumper assembly comprising at least one resilient element fixedly disposed with respect to the base plate. The drive arm impinges the resilient element when the plurality of shutter blades is in the open and closed positions, and the drive arm is isolated from contact with the resilient element when the plurality of shutter blades is between the open and closed positions.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: November 27, 2012
    Assignee: VA, Inc.
    Inventors: David Viglione, Helen Hong Yan, John Thomas Jones
  • SHUTTER DAMPING ASSEMBLY
    Publication number: 20110206362
    Abstract: A rotary photographic shutter includes a base plate, a rotating ring, a plurality of shutter blades pivotally connected to the base plate, and moveable between an open position and a closed position in response to rotation of the ring, and an actuation assembly connected to the base plate, the actuation assembly includes a drive arm operable to selectively rotate the ring. The exemplary rotary photographic shutter also includes a bumper assembly comprising at least one resilient element fixedly disposed with respect to the base plate. The drive arm impinges the resilient element when the plurality of shutter blades is in the open and closed positions, and the drive arm is isolated from contact with the resilient element when the plurality of shutter blades is between the open and closed positions.
    Type: Application
    Filed: February 24, 2010
    Publication date: August 25, 2011
    Applicant: VA, Inc.
    Inventors: David Viglione, Helen Hong Yan, John Thomas Jones