Patents by Inventor Hirokazu Amino

Hirokazu Amino 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: 6660005
    Abstract: A vertebra correcting and fixing device including: a vertebra fixing screw to be threadedly connected to a vertebra; A movable spherical body which can be combined with this vertebra fixing screw; and a clamping screw threadedly connected to the movable spherical body. The movable spherical body is substantially spherical, has a split through-hole formed in the diametrical direction thereof, and also has a screw hole extending at right angles to tho split through hole and communicating therewith. Provision is made such that the clamping screw is threadedly connected to this screw hole. The vertebra fixing screw is provided at one end thereof with a threaded portion and at the other end thereof with a groove-shape scat portion for receiving and holding the movable spherical body. The seat portion is capable of rotatably holding the spherical body.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: December 9, 2003
    Assignee: Kyocera Corporation
    Inventors: Yoshiaki Toyama, Morio Matsumoto, Takashi Nishizawa, Hirokazu Amino
  • Publication number: 20020082601
    Abstract: A vertebra correcting and fixing device including: a vertebra fixing screw to be threadedly connected to a vertebra; A movable spherical body which can be combined with this vertebra fixing screw; and a clamping screw threadedly connected to the movable spherical body. The movable spherical body is substantially spherical, has a split through-hole formed in the diametrical direction thereof, and also has a screw hole extending at right angles to tho split through hole and communicating therewith. Provision is made such that the clamping screw is threadedly connected to this screw hole. The vertebra fixing screw is provided at one end thereof with a threaded portion and at the other end thereof with a groove-shape scat portion for receiving and holding the movable spherical body. The seat portion is capable of rotatably holding the spherical body.
    Type: Application
    Filed: December 26, 2001
    Publication date: June 27, 2002
    Inventors: Yoshiaki Toyama, Morio Matsumoto, Takashi Nishizawa, Hirokazu Amino
  • Patent number: 5732469
    Abstract: A prosthesis for the replacement of hard tissues of human bones and joints, comprising a porous lamination component of metal thin sheets, each having a plurality of through holes and a thickness of 150 .mu.m or less, and being unharmful to the living body, the porous lamination component being formed such that the sheets are laid over one another and are then diffusion-bonded therebetween into one body by heating so that the through holes communicate with one another in the direction of the thickness thereof, and the prosthesis being entirely or partially composed of the porous lamination component. The present invention also relates to a method of making such a prosthesis. The present invention can provide prostheses which are not required to be replaced again, thereby imposing a less burden to patients.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: March 31, 1998
    Assignee: Kyocera Corporation
    Inventors: Shoichi Hamamoto, Hirokazu Amino, Noriyuki Ishida, Yasunori Tamura, Yoichi Nishio, Masaru Ichimiya
  • Patent number: 5549684
    Abstract: An artificial knee joint comprising a femur member to be secured to the distal portion of a femur and a tibia member to be secured to the proximal portion of a tibia, wherein the femur member is made of alumina ceramics or zirconia ceramics, and the tibia member is a combination of a sliding section made of high-density polyethylene and a seat section made of titanium, titanium alloy, cobalt-chromium alloy or stainless steel.With this joint, the service life of the tibia member can be extended significantly. This disclosure also includes a modified embodiment of the above-mentioned artificial knee joint that includes reinforcing ribs with a special cross sectional shape to increase resistance against bending force applied to the femur member.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: August 27, 1996
    Assignee: Kyocera Corporation
    Inventors: Hirokazu Amino, Ian C. Clarke
  • Patent number: 5496372
    Abstract: A prosthesis for the replacement of hard tissues of human bones and joints, comprising a porous lamination component of metal thin sheets, each having a plurality of through holes and a thickness of 150 .mu.m or less, and being unharmful to the living body, the porous lamination component being formed such that the sheets are laid over one another and are then diffusion-bonded therebetween into one body by heating so that the through holes communicate with one another in the direction of the thickness thereof, and the prosthesis being entirely or partially composed of the porous lamination component. The present invention also relates to a method of making such a prosthesis. The present invention can provide prostheses which are not required to be replaced again, thereby imposing a less burden to patients.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: March 5, 1996
    Assignee: Kyocera Corporation
    Inventors: Shoichi Hamamoto, Hirokazu Amino, Noriyuki Ishida, Yasunori Tamura, Yoichi Nishio, Masaru Ichimiya
  • Patent number: 5413610
    Abstract: An artificial hip joint of the type wherein a metal stem is fitted into the tapered hall of a ceramic stem head via a tapered cone in the stem, the hip joint being characterized in that the tapered stem engages the tapered hall in the deeper portion of the tapered hall, whereby the compression strength (fracture load) of the stem head is improved. Deep engagement of the tapered stem within the tapered hall is accomplished by, for example, making the angle of the taper of the tapered cone slightly smaller than that of the tapered stem. Preferably, the angle of taper of the tapered cone is smaller than that of the tapered hall by about 40 minutes or less. In addition, the diameter at the base of the hall is enlarged to form a cavity.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: May 9, 1995
    Assignee: Kyocera Corporation
    Inventors: Hirokazu Amino, Yoshinori Shiraiwa, Ian C. Clarke
  • Patent number: 5362311
    Abstract: In an artificial hip joint, in which a tapered cone of a metallic stem is inserted into a tapered hole of a ceramic stem head to be fixed, a truncated conical sleeve having a thickness of 50 .mu.m to 5.0 mm is compressedly held between a wall surface of the tapered hole and an outer circumferential surface of the tapered cone such that they are taperedly engaged with each other. With this artificial hip joint, an increased strength of the stem head, easy production, miniaturization, increased useful life time, safety in use, and the protection of the tapered cone are achieved.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: November 8, 1994
    Assignee: Kyocera Corporation
    Inventors: Hirokazu Amino, Yoshinori Shiraiwa, Ian C. Clarke
  • Patent number: 5152687
    Abstract: A composite implant member to be embedded both in a soft tissue and in a hard tissue comprising a ceramic soft tissue contact portion adapted to come in contact as with the skin and muscle and a metallic hard tissue contact portion adapted to come in contact as with the bone and osteoid tissue.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: October 6, 1992
    Assignee: Kyocera Corporation
    Inventor: Hirokazu Amino
  • Patent number: 5151102
    Abstract: A blood vessel coagulation/stanching device for flowing high-frequency current between a pair of forceps with a blood vessel being held between the ends of the forceps to cauterize, coagulate and stanch the blood vessel, the device being characterized in that the blood vessel holding section of the forceps comprises a blood vessel contact member made of an electrically insulating sintered substance with a low thermal conductivity, and the blood vessel contact member being provided on its surface with exposed electrodes at an areal ratio between 5% and 60% to the entire surface of the blood vessel contact member. With this device, the blood vessel contact section of the forceps is not excessively heated, preventing a blood vessel from burning. This eliminates any stanching failure due to removal of a coagulated blood vessel portion and ensures superior coagulation and stanching.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: September 29, 1992
    Assignees: Kyocera Corporation, Hiroyasu Kamiyama
    Inventors: Hiroyasu Kamiyama, Hirokazu Amino