Patents by Inventor Kinpei Okano

Kinpei Okano 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: 4545741
    Abstract: A vertical motor pump including an upper bearing and a lower bearing located on the motor side for journaling a rotary shaft for rotation at an upper portion and a lower portion respectively of a rotor, at least one of the upper and lower bearings being constituted by a ball bearing. The vertical motor pump further includes a hydrostatic lubricated bearing system for journaling the rotary shaft besides the ball bearing, for bearing a radial thrust during operation.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: October 8, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Shunzoo Tomioka, Masaaki Nakano, Kinpei Okano, Kousaku Shimizu, Hiroaki Yoda
  • Patent number: 4529209
    Abstract: A rotary shaft of a hydraulic machine has a collar projecting radially outwardly therefrom. The rotary shaft and the collar are encased by a casing which carries a seal ring to be pressed against an axial end surface of the collar to form a fluid-tight seal therebetween. The axial end surface of the collar slidingly contacting with the seal ring is provided with a plurality of radial grooves extending from the central portion of the collar to the outer peripheral edge thereof. As the rotary shaft rotates at a high speed, a centrifugal force is generated to separate sand and soil particles from the water within the radial grooves.
    Type: Grant
    Filed: June 6, 1983
    Date of Patent: July 16, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Katsutoshi Nii, Kinpei Okano, Shunzo Tomioka
  • Patent number: 4508396
    Abstract: A method of producing a bearing component such as an inner ring, an outer ring and rolling elements having a solid lubricant on a frictional surface part thereof, which comprises a step of forming a coating of a material on a frictional surface part of a metal substrate, the solubilities of the coating material in the substrate metal and in the solid lubricant being higher than the mutual solubility of the substrate metal and the solid lubricant, a step of providing on a surface part of the coating a solid lubricant consisting of a metallic material having a low solubility in the substrate metal, and a step of maintaining the solid lubricant, the coating and the metal substrate for a predetermined period of time at a predetermined temperature of below the lower one of the maximum operating temperature of the bearing component and the melting point of the solid lubricant so as to induce mutual diffusion between the metal substrate, the coating and the solid lubricant, thereby increasing the bonding strength be
    Type: Grant
    Filed: May 14, 1982
    Date of Patent: April 2, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Motomichi Doi, Kinpei Okano, Katsutoshi Nii, Yoshiharu Yokota
  • Patent number: 4433432
    Abstract: A rotary anode X-ray tube accommodated in a housing together with oil has a journal box fixed and inwardly extending inside the tube, an anode target fixed to a rotor supported by the journal box and a cathode member opposing the anode target and fixed at an end portion inside the tube opposing the journal box. The fixing portion between the rotary anode X-ray tube and the journal box is supported by a resilient support member on the housing and vibration damping means is disposed on the support member. The vibration damping means includes a moving member fixed at its center and a fixed member fixed to the housing so as to encompass the moving member with a predetermined gap, and oil is fully charged in the gap. Vibration of the rotation system is transmitted to the moving member and the operation of this member damps the vibration by means of the squeeze action of the oil.
    Type: Grant
    Filed: November 4, 1981
    Date of Patent: February 21, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Katsutoshi Nii, Kinpei Okano, Motomichi Doi, Minoru Kitsuya
  • Patent number: 4416555
    Abstract: A bearing system for a vertical type rotary machine including a vertically extending rotor shaft including a guide bearing immersed in oil in an oil tank disposed around the rotor shaft. The guide bearing has a cylindrical bearing surface juxtaposed against the peripheral surface of the rotor shaft and a plurality of axially extending oil grooves formed in the cylindrical bearing surface. An oil guide member is mounted on a lower end surface of the guide bearing adjacent to the open lower axial end of each oil groove. Each oil guide member has a guide surface facing a flow of oil in the oil tank induced by the rotation of the rotor shaft for guiding the oil flow into the associated oil groove. The guide surface has a lower edge thereof remote from the lower end surface of the guide bearing, which is advanced toward the direction of oil flow with respect to an upper edge of the guide surface adjacent to the lower end surface of the guide bearing.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: November 22, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Shunzo Tomioka, Kinpei Okano, Masanori Matsuo, Akira Hasegawa, Akira Kitamura
  • Patent number: 4376389
    Abstract: A method of and an apparatus for diagnosis of the operating conditions of a bearing wherein pressures of a film of oil formed on a sliding surface of the bearing journalling a rotary shaft are detected at a plurality of points on the sliding surface, and the pressure differential between the pressures of the oil film detected at the plurality of points is calculated. The deflection of the bearing with respect to the rotary shaft is calculated based on the calculated oil pressure film pressure differential, so that the operating conditions of the bearing are judged based on the deflection thereof.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: March 15, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Tomoaki Inoue, Kinpei Okano, Kazuo Ikeuchi, Tsuguaki Koga
  • Patent number: 4291926
    Abstract: A guide bearing device for vertical rotary shafts including a plurality of segmental pads disposed circumferentially equidistantly around the rotary shaft, a plurality of adjusting bolts each supporting the respective segmental pads for pivotal movement, a housing containing the segmental pads and adjustably mounting the adjusting bolts and filled with lubricating oil, and a plurality of cooling pads each formed with an oil passage and arranged between the two adjacent segmental pads for pivotal movement, each of the cooling pads defining between its inner surface and the outer circumferential surface of the rotary shaft a gap which is thicker than the gap defined between a sliding surface of the respective segmental pads and the outer circumferential surface of the rotary shaft, said oil passage of each cooling pad communicating with a pressurized oil supply source and discharging lubricating oil toward the outer circumferential surface of the rotary shaft.
    Type: Grant
    Filed: September 21, 1979
    Date of Patent: September 29, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Shunzo Tomioka, Kinpei Okano, Masanori Matsuo, Yosio Furukawa
  • Patent number: 4093320
    Abstract: A bearing consisting of a pivot having a semi-spherical or hemi-spherical end portion formed with helical grooves and immersed in lubricating oil, and a cup bearing element also immersed in lubricating oil for supporting the pivot. A plurality of helical grooves disposed on the semi-pherical end portion are formed and arranged such that the lubricating oil is supplied under pressure to sliding surfaces of the pivot and the cup bearing element. An annular recess is formed on the intake side of the grooves.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: June 6, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Ryoichi Kaneko, Katutosi Nii, Hiroo Hiroyama, Kinpei Okano
  • Patent number: 4037890
    Abstract: A vertical type antifriction bearing device which includes an antifriction bearing using balls or rollers as rolling members. This bearing device features that, during operation, the level of lubricating oil is maintained below the antifriction bearing allowing the feed of lubricating oil to the antifriction bearing in a suitable amount, and that during the stoppage of operation, the level of the lubricating oil is raised above the antifriction bearing, whereby during the stoppage of operation the antifriction bearing is shielded from atmosphere or moisture to prevent the corrosion thereof and, during the operation, the agitation loss caused by the lubricating oil is minimized.
    Type: Grant
    Filed: April 15, 1975
    Date of Patent: July 26, 1977
    Assignee: Hitachi, Ltd.
    Inventors: Seiichi Kurita, Toru Nakayama, Kinpei Okano, Seishi Watahiki
  • Patent number: 3940191
    Abstract: A bearing comprising rows of rollers disposed between the outer and inner races, wherein a nozzle is provided for supplying lubricating oil mist to the entire periphery of the distance piece provided between said outer races, said nozzle being provided with oil supply apertures directed toward the roller end faces adjacent flange end faces of the inner race, said distance piece being also provided at a part thereof with holes or grooves through which oil can be discharged, said holes or grooves being positioned at a level of or lower than the lowest of roller contacting areas of inner surface of said outer races.
    Type: Grant
    Filed: October 10, 1973
    Date of Patent: February 24, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Shunzo Tomioka, Kinpei Okano, Toshiyuki Kajiwara