Direct Application Of Electrical, Magnetic, Wave, Or Particulate Energy Patents (Class 427/457)
  • Patent number: 5226975
    Abstract: A method of forming a wear-resistant coating for internal combustion engine component parts which allows the part to remain dimensionally stable under severe engine operating conditions is provided. The coating is formed by a two step method. First, the engine part is coated with chromium to form a chromium base layer. Second, the chromium coated part is subjected to a reactive gas plasma in a reaction chamber at an elevated temperature and under an applied electrical potential. The gas of the plasma reacts with the chromium to form the wear-resistant layer. Preferably, the reactive gas is nitrogen which reacts with the chromium to form a chromium nitride surface layer on the chromium base layer.
    Type: Grant
    Filed: March 20, 1991
    Date of Patent: July 13, 1993
    Assignee: Cummins Engine Company, Inc.
    Inventors: James E. Denton, Buel D. Napier
  • Patent number: 5154944
    Abstract: A method and apparatus for developing a latent magnetic image in which a layer of magnetically attractable toner powder having a specific resistance less than 10.sup.9 ohms.meter is conveyed by a toner conveyor to a developing zone past a medium carrying the latent image and an AC voltage is applied between the toner conveyor and the medium carrying the latent image.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: October 13, 1992
    Assignee: Oce-Nederland B.V.
    Inventor: Pierre A. M. Klerken
  • Patent number: 5145711
    Abstract: Diamond films or i-carbon films can be formed on a surface by virtue of cyclotron resonance chemical vapor deposition. The characteristics such as transmissivity, conductivity and hardness of the films can be easily controlled by introducing a halogen into the films.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: September 8, 1992
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Shigenori Hayashi