Patents by Inventor Yasuaki Unno

Yasuaki Unno 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).

  • Exhaust gas purifying device and method for purifying exhaust gas
    Patent number: 6174835
    Abstract: An exhaust gas purifying catalyst for use in an oxygen surplus atmosphere, includes a brown millerite composite oxide for directly decomposing and absorbing nitrogen oxide (NOx), and a noble metal-series reducing catalyst disposed on the surface of said brown millerite composite oxide. The brown millerite composite oxide is represented by one of the following formulae: A3-aBaC4-bDbO9, A2-aBaC2-bDbO5, and A1-aBaC2-bDbO4 where A and B are elements selected from the group consisting of Ba, Ca, Sr, Mg and Ce, C and D are elements selected from the group consisting of Y, Dy, Zn, Ti, Mn, Fe, Co, Ni, Cu, Sn, Zr and Nd, a is within the range 0≦a<1, and b is within the range 0≦b<2.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: January 16, 2001
    Assignee: Isuzu Ceramics Research Institute Co., Ltd.
    Inventors: Isao Naito, Kazuo Oosumi, Yasuaki Unno
  • Low frictional ceramic material for sliding member
    Patent number: 5866491
    Abstract: A low frictional ceramic material for sliding member, consists essentially of oxide of aluminum (Al) and oxide of zirconium (Zr) and contains oxide of cerium (Ce). Aluminum (Al) content is 50 to 75 wt. % in terms of alumina (Al.sub.2 O.sub.3), zirconium (Zr) content is 20 to 45 wt. % in terms of zirconia (ZrO.sub.2), and cerium (Ce) content is 3 to 20 wt. % in terms of ceria (CeO.sub.2)in said low frictional ceramic material for sliding member.Instead of oxide of aluminum (Al) and oxide of zirconium (Zr), it is capable to use a .alpha.-sialon.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: February 2, 1999
    Assignee: Isuzu Ceramics Research Institute Co., Ltd.
    Inventor: Yasuaki Unno
  • Low friction engine cylinder and production method therefor
    Patent number: 5846644
    Abstract: A slidably engaged surface of a sliding member has a first travel length portion formed of a composite material providing a small contact angle with respect to lubricating oil and an adjoining second travel length portion formed of a composite material providing a higher contact angle with the lubricating oil. The first length portion preferably corresponds to boundary and mixed lubricating areas and the second length portion corresponds to a fluid lubricating area.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: December 8, 1998
    Assignee: Isuzu Ceramics Research Institute Co.
    Inventors: Hideki Kita, Yasuaki Unno, Hideo Kawamura
  • Low-friction ceramics
    Patent number: 5643842
    Abstract: The present invention provides a low-friction ceramic having a lowered coefficient of friction and an enhanced strength. The ceramic comprises as the matrix phase a nonoxide ceramic containing silicon, such as Si.sub.3 N.sub.4 or SiC and an iron compound in an amount of about 5 to 40% by weight dispersed in the matrix phase. This ceramic is excellent in the ability to adsorb lubricating oil, has a low coefficient of friction, is almost free from pores, and has a strength equal to or higher than that of a ceramic containing no iron oxide.
    Type: Grant
    Filed: August 3, 1995
    Date of Patent: July 1, 1997
    Assignee: Isuzu Ceramics Research Institute Co., Ltd.
    Inventors: Yasuaki Unno, Hideo Yamamuro, Hideki Kita