Patents by Inventor Wewage H. L. Dep

Wewage H. L. Dep 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).

  • Thin layer nuclear density gauge
    Patent number: 6442232
    Abstract: The present invention provides an improved thin layer nuclear density gauge comprising a gauge housing having a vertical cavity therethrough and a base, a first radiation detector located at a first position within said housing and adjacent to said base of said housing, a second radiation detector located at a second position within said housing and adjacent to said base of said housing, a vertically moveable source rod extending into said cavity of said gauge housing, a radiation source operatively positioned within a distal end of said source rod, at least one bearing operatively positioned to guide said source rod within said cavity, and means for vertically extending and retracting said source rod to a plurality of predetermined source rod positions so as to change the spatial relationship between said radiation source and said first and second radiation detectors. The source rod has a maximum radial movement of less than about 0.003 inch at each predetermined position.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: August 27, 2002
    Assignee: Troxler Electronic Laboratories, Inc.
    Inventors: Robert E. Troxler, Wewage H. L. Dep, John T. Eagan, Alfred W. Jordan
  • Thin layer nuclear density gauge
    Publication number: 20010055363
    Abstract: The present invention provides an improved thin layer nuclear density gauge comprising a gauge housing having a vertical cavity therethrough and a base, a first radiation detector located at a first position within said housing and adjacent to said base of said housing, a second radiation detector located at a second position within said housing and adjacent to said base of said housing, a vertically moveable source rod extending into said cavity of said gauge housing, a radiation source operatively positioned within a distal end of said source rod, at least one bearing operatively positioned to guide said source rod within said cavity, and means for vertically extending and retracting said source rod to a plurality of predetermined source rod positions so as to change the spatial relationship between said radiation source and said first and second radiation detectors. The source rod has a maximum radial movement of less than about 0.003 inch at each predetermined position.
    Type: Application
    Filed: August 16, 2001
    Publication date: December 27, 2001
    Applicant: Troxler Electronic Laboratories, Inc.
    Inventors: Robert E. Troxler, Wewage H. L. Dep, John T. Eagan, Alfred W. Jordan
  • Thin layer nuclear density guage
    Patent number: 6310936
    Abstract: The present invention provides an improved thin layer nuclear density gauge comprising a gauge housing having a vertical cavity therethrough and a base, a first radiation detector located at a first position within said housing and adjacent to said base of said housing, a second radiation detector located at a second position within said housing and adjacent to said base of said housing, a vertically moveable source rod extending into said cavity of said gauge housing, a radiation source operatively positioned within a distal end of said source rod, at least one bearing operatively positioned to guide said source rod within said cavity, and means for vertically extending and retracting said source rod to a plurality of predetermined source rod positions so as to change the spatial relationship between said radiation source and said first and second radiation detectors. The source rod has a maximum radial movement of less than about 0.003 inch at each predetermined position.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: October 30, 2001
    Assignee: Troxler Electronic Laboratories, Inc.
    Inventors: Robert E. Troxler, Wewage H. L. Dep, John T. Eagan, Alfred W. Jordan