Patents by Inventor Keiichi Kanemitsu

Keiichi Kanemitsu 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).

  • Patent number: 6494461
    Abstract: An improved sliding member is provided that has a sliding surface and a deposition layer formed on the sliding surface utilizing an ion-plating method, wherein the deposition layer is composed mainly of chrome nitride, including CrN. The CrN of the chrome nitride has a preferred orientation of plane {111} and contains boron in an amount of not less than 0.05 and not more than 20 weight percent. The deposition layer further contains oxygen and/or carbon in an amount of not more than 15 weight percent. The improved sliding member exhibits excellent abrasion and scuff resistance and enhanced peeling resistance.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: December 17, 2002
    Assignee: Nippon Piston Ring Co., Ltd.
    Inventors: Katsuaki Ogawa, Keiichi Kanemitsu
  • Patent number: 6315840
    Abstract: An object of the present invention is to provide a sliding member which is coated a film having superior wear resistance, superior scuffing resistance and a superior property not to increase an amount of wear on an opponent material (an opponent attacking property). This object can be achieved by providing a sliding member coated by a Cr—B—N alloy film 4 on an outer surface 3 thereof. In this case, it is preferable that the Cr—B—N alloy film is formed through a physical vapor deposition, particularly ion plating, vacuum deposition, or sputtering. Further, it is preferable that the boron (B) content is within the range of 0.05-20 wt.%.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: November 13, 2001
    Assignee: Nippon Piston Ring Co., Ltd.
    Inventors: Motonobu Onoda, Katsuaki Ogawa, Keiichi Kanemitsu
  • Patent number: 6235415
    Abstract: According to an embodiment of the present invention, an improved sliding member is provided that has a sliding surface and a deposition layer formed on the sliding surface by means of an ion-plating method, where the deposition layer is composed mainly of CrN. The improvement comprises the CrN which has a preferred orientation of the plane {110}, where the deposition layer contains boron at a containing ratio not less than 0.05 and not more than 20 weight percent. According to another embodiment of the present invention, an improved sliding member is provided that has a sliding surface and a deposition layer formed on the sliding surface by means of an ion-plating method, where the deposition layer is composed mainly of CrN. The improvement comprises the CrN which has a preferred orientation of the plane {110}, where the deposition layer contains boron, at a containing ratio not less than 0.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: May 22, 2001
    Assignee: Nippon Piston Ring Co., Ltd.
    Inventors: Katsuaki Ogawa, Keiichi Kanemitsu
  • Patent number: 6232003
    Abstract: According to an embodiment of the present invention, an improved sliding member is provided that has a sliding surface and a deposition layer formed on the sliding surface by means of an ion-plating method, where the deposition layer is composed mainly of chrome nitride, including CrN. The improvement comprises the CrN of the chrome nitride which has a preferred orientation of the plane {100}, where the deposition layer contains boron at a containing ratio not less than 0.05 and not more than 20 weight percent. According to another embodiment of the present invention, an improved sliding member is provided that has a sliding surface and a deposition layer formed on the sliding surface by means of an ion-plating method, where the deposition layer is composed mainly of chrome nitride, including CrN. The improvement comprises the CrN of the chrome nitride which has a preferred orientation of the plane {100}, where the deposition layer contains boron, at a containing ratio not less than 0.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: May 15, 2001
    Assignee: Nippon Piston Ring CO, Ltd.
    Inventors: Katsuaki Ogawa, Keiichi Kanemitsu
  • Patent number: 6139984
    Abstract: An object of the present invention is to provide a sliding member which is coated a film having superior wear resistance, superior scuffing resistance and a superior property not to increase an amount of wear on an opponent material (an opponent attacking property). This object can be achieved by providing a sliding member coated by a Cr--V--B--N alloy film 4 on an outer surface 3 thereof. In this case, it is preferable that the Cr--V--B--N alloy film is formed through a physical vapor deposition, particularly ion plating, vacuum deposition, or sputtering. Further, it is preferable that V (Vanadium) content is within the range of 0.1-30 wt. % and the boron (B) content is within the range of 0.05-20 wt. %.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: October 31, 2000
    Assignee: Nippon Piston Ring Co., Ltd.
    Inventors: Motonobu Onoda, Katsuaki Ogawa, Keiichi Kanemitsu