Patents Assigned to Ryuji Ninomiya
  • ABRAION RESISTANT COPPER ALLOY, COPPER ALLOY POWDER FOR BUILD-UP CLADDING, AND ENGINE CYLINDER HEAD
    Publication number: 20010001641
    Abstract: A valve seat (2) is formed by build-up cladding by irradiating a laser beam on a copper alloy powder (4) provided in the rim of a port (3) formed in an engine cylinder head (1). The copper alloy powder (4) consists of copper (Cu), 6-9 wt % nickel (Ni), 1-5 wt % silicon (si), and 1-5 wt % of one of molybdenum (Mo), tungsten (W), tantalum (Ta), niobium (Nb) and vanadium (V). Due to this composition, the valve seat (2) has few microcracks and excellent abrasion resistance.
    Type: Application
    Filed: February 22, 1999
    Publication date: May 24, 2001
    Applicant: Ryuji Ninomiya
    Inventors: RYUJI NINOMIYA, TAKESHI OJIRO, KOICHI MIYAKE, MAKOTO KANO, KENJI TSUSHIMA, HIDENOBU MATSUYAMA, KENJI SUZUKI