Patents by Inventor Dana L. Caldwell

Dana L. Caldwell 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).

  • High pressure lamp bulb and method of induction sealing
    Patent number: 6641449
    Abstract: A high pressure, lamp may be made in a pressure vessel by using an induction coil to melt an edge portion of a sealing wafer pressed against the circumference of an opening in the body of the lamp envelope. The pressure vessel and the lamp envelope are filled with desired fill materials. Induction heating is carried out by the induction coil and induction receiver that presses against the wafer, the lamp envelope or both to hold the melting piece or pieces in contact. The induction receiver may be fused to the lamp body forming a functional part of the overall lamp structure. The preferred resulting lamp includes a bonded metal piece that can be conveniently used for electrical or mechanical coupling or positioning of the lamp with respect to a base.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: November 4, 2003
    Assignee: Osram Sylvania Inc.
    Inventors: David W. Johnston, Ernest A. Davey, Jr., Gregory Zaslavsky, Dana L. Caldwell
  • Induction sealed high pressure lamp bulb
    Patent number: 6566814
    Abstract: A high pressure, lamp may be made in a pressure vessel by using an induction coil to melt an edge portion of a sealing wafer pressed against the circumference of an opening in the body of the lamp envelope. The pressure vessel and the lamp envelope are filled with desired fill materials. Induction heating is carried out by the induction coil and induction receiver that presses against the wafer, the lamp envelope or both to hold the melting piece or pieces in contact. The induction receiver may be fused to the lamp body forming a functional part of the overall lamp structure. The preferred resulting lamp includes a bonded metal piece that can be conveniently used for electrical or mechanical coupling or positioning of the lamp with respect to a base.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: May 20, 2003
    Assignee: Osram Sylvania Inc.
    Inventors: David W. Johnston, Ernest A. Davey, Jr., Gregory Zaslavsky, Dana L. Caldwell
  • Induction sealed high pressure lamp bulb
    Publication number: 20020153837
    Abstract: A high pressure, lamp may be made in a pressure vessel by using an induction coil to melt an edge portion of a sealing wafer pressed against the circumference of an opening in the body of the lamp envelope. The pressure vessel and the lamp envelope are filled with desired fill materials. Induction heating is carried out by the induction coil and induction receiver that presses against the wafer, the lamp envelope or both to hold the melting piece or pieces in contact. The induction receiver may be fused to the lamp body forming a functional part of the overall lamp structure. The preferred resulting lamp includes a bonded metal piece that can be conveniently used for electrical or mechanical coupling or positioning of the lamp with respect to a base.
    Type: Application
    Filed: April 24, 2001
    Publication date: October 24, 2002
    Inventors: David W. Johnston, Ernest A. Davey, Gregory Zaslavsky, Dana L. Caldwell
  • High pressure lamp bulb and method of induction sealing
    Publication number: 20020153838
    Abstract: A high pressure, lamp may be made in a pressure vessel by using an induction coil to melt an edge portion of a sealing wafer pressed against the circumference of an opening in the body of the lamp envelope. The pressure vessel and the lamp envelope are filled with desired fill materials. Induction heating is carried out by the induction coil and induction receiver that presses against the wafer, the lamp envelope or both to hold the melting piece or pieces in contact. The induction receiver may be fused to the lamp body forming a functional part of the overall lamp structure. The preferred resulting lamp includes a bonded metal piece that can be conveniently used for electrical or mechanical coupling or positioning of the lamp with respect to a base.
    Type: Application
    Filed: April 24, 2001
    Publication date: October 24, 2002
    Inventors: David W. Johnston, Ernest A. Davey,, Gregory Zaslavsky, Dana L. Caldwell