Patents by Inventor Wing S. Liu

Wing S. Liu 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).

  • Patent number: 5351371
    Abstract: An optical fiber splicing device includes a clip (20) which aligns and secures cylindrical rods (28, 30 and 32) utilized within a three-rod optical fiber splicing device. The clip (20) is a generally cylindrically shaped component which is made of a resilient material and is positionable so as to encase three cylindrical rods (28, 30 and 32). The clip (20) comprises a circular body portion (22) and two protruding leg portions (24 and 26) which extend from an point on the outer periphery of clip body (22). The two leg portions (24 and 26) are constructed and oriented such that they may be manipulated to controllably expand the inner diameter of clip body (22). To facilitate an optical fiber splice or connection, the clip (20) of the present invention allows the clip body (22) to be expanded to loosen the grip on rods (28, 30 and 32) held therein, thereby allowing the optical fiber ends to be inserted between the rods.
    Type: Grant
    Filed: May 26, 1993
    Date of Patent: October 4, 1994
    Assignee: AT&T Bell Laboratories
    Inventors: George F. DeVeau, Jr., Monty J. Edwards, Wing S. Liu, Charles McGonigal
  • Patent number: 5220630
    Abstract: An optical fiber splicing device includes a clip (20) which aligns and secures cylindrical rods (28, 30 and 32) utilized within a three-rod optical fiber splicing device. The clip (20) is a generally cylindrically shaped component which is made of a resilient material and is positionable so as to encase three cylindrical rods (28, 30 and 32). The clip (20) comprises a circular body portion (22) and two protruding leg portions (24 and 26) which extend from an point on the outer periphery of clip body (22). The two leg portions (24 and 26) are constructed and oriented such that they may be manipulated to controllably expand the inner diameter of clip body (22). To facilitate an optical fiber splice or connection, the clip (20) of the present invention allows the clip body (22) to be expanded to loosen the grip on rods (28, 30 and 32) held therein, thereby allowing the optical fiber ends to be inserted between the rods.
    Type: Grant
    Filed: May 12, 1992
    Date of Patent: June 15, 1993
    Assignee: AT&T Bell Laboratories
    Inventors: George F. DeVeau, Jr., Monty J. Edwards, Wing S. Liu, Charles McGonigal
  • Patent number: 5131064
    Abstract: A communications cable for use in buried environments in an outside plant includes a core (22) comprising at least one transmission medium and a mechanically strengthened, thermal resistant barrier layer (40) disposed about a plastic tubular member (23). A metallic shield (32) and a plastic jacket (36) are disposed about the barrier. The barrier layer may comprise a tape (41) which is made of a material such as woven glass or an aramid fibrous material, for example, which is resistant to relatively high temperatures, which has suitable strength properties in all directions and at elevated temperatures and which is characterized by properties which cause the barrier layer to impede the passage therethrough of particles which are sufficiently large to cause damage to the core. In a preferred embodiment, the thermal barrier layer also includes provisions for preventing the longitudinal flow of water within the cable.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: July 14, 1992
    Assignee: AT&T Bell Laboratories
    Inventors: Candido J. Arroyo, Nathan E. Hardwick, III, Michael D. Kinard, Wing S. Liu, Parbhubhai D. Patel, Walter J. Paucke, Phillip M. Thomas
  • Patent number: 4915472
    Abstract: There is disclosed a connector for two terminal plugs having bores in which are recieved respective optical fibers having free ends terminating at the front ends of such plugs. The connector comprises a longitudinal sleeve of sheet metal having a bottom, back and top and a longitudinal opening at its front. The sleeve contains a guide disposed alongside a longitudinal passage through the sleeve for receiving the two plugs end-to-end. The sleeve top is divided by lateral slits into two central resilient fingers and two resilient tabs at the sleeve ends. The fingers exert forces to press the end-to-end plugs against the guide to align them, while the tabs exert greater forces on the guide to maintain it clamped with the sleeve. The slits extend part way down the back of the sleeve, the guide has beveled edges, and the mentioned opening is bordered by top and bottom lips adapted to be pried apart by a pliers tool.
    Type: Grant
    Filed: December 28, 1988
    Date of Patent: April 10, 1990
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventor: Wing S. Liu