Patents by Inventor Sadao Sakuguchi

Sadao Sakuguchi 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 discharge lamp, high pressure discharge lamp lighting apparatus and luminaire therefor
    Patent number: 6661176
    Abstract: A high pressure discharge lamp includes a light-transmissive ceramic discharge vessel with an envelope having a maximum outer diameter D1 and open ends, a metal pipe having one end, i.e., a top end fused in the open end of the light-transmissive ceramic discharge vessel and the other end, i.e., a base end protruding from the light-transmissive ceramic discharge vessel, a pair of electrodes each having one end, i.e., a base end connectively supported on the base end of the metal pipe and the other end, i.e., a top end extending within the light-transmissive ceramic discharge vessel, and a discharge agent which is filled in the light-transmissive ceramic discharge vessel, wherein it is also characterized by that the high pressure discharge lamp has an overall length L1, and the overall length L1 and the maximum outer diameter of D1 satisfies a following equation. 1.5≦L1/D1≦4.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: December 9, 2003
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Hisashi Honda, Sadao Sakuguchi, Masazumi Ishida, Seiji Ashida, Shigemi Oku, Takahito Kashiwagi
  • High pressure discharge lamp, high pressure discharge lamp lighting apparatus and luminaire therefor
    Publication number: 20020135304
    Abstract: A high pressure discharge lamp includes a light-transmissive ceramic discharge vessel with an envelope having a maximum outer diameter D1 and open ends, a metal pipe having one end, i.e., a top end fused in the open end of the light-transmissive ceramic discharge vessel and the other end, i.e., a base end protruding from the light-transmissive ceramic discharge vessel, a pair of electrodes each having one end, i.e., a base end connectively supported on the base end of the metal pipe and the other end, i.e., a top end extending within the light-transmissive ceramic discharge vessel, and a discharge agent which is filled in the light-transmissive ceramic discharge vessel, wherein it is also characterized by that the high pressure discharge lamp has an overall length L1, and the overall length L1 and the maximum outer diameter of D1 satisfies a following equation.
    Type: Application
    Filed: December 12, 2001
    Publication date: September 26, 2002
    Inventors: Hisashi Honda, Sadao Sakuguchi, Masazumi Ishida, Seiji Ashida, Shigemi Oku, Takahito Kashiwagi