Patents Assigned to Saga University
  • Patent number: 6703904
    Abstract: A high frequency oscillator for combining outputs of two oscillator to generate an oscillation output. The oscillators has a substrate, a slot line formed on a first main plane of the substrate and having both longitudinal ends, the both longitudinal ends being electrically short-circuited, a first and a second amplifier for oscillation, each disposed on one and the other side of the slot line, and having outputs of the same oscillation frequency, and an unbalanced transmission line for connecting input terminals of the first and second amplifiers to each other and for connecting output terminals of the first and second amplifiers to each other. The unbalanced transmission line traverses the slot line and forms a closed loop including the first and second amplifiers.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: March 9, 2004
    Assignees: Nihon Dempa Kogyo Co., LTD, Saga University
    Inventors: Masayoshi Aikawa, Fumio Asamura, Takeo Oita
  • Publication number: 20030013070
    Abstract: A system is provided for producing an educational material to students. The present systems has storing part for storing raw educational materials into a database, input part for inputting both student-related data and educational environment-related data and educational material producing unit for selecting at least one raw educational material from said database based on predetermined selecting criteria and said inputted both student-related data and educational environment-related data to produce an educational material from said selected at least one raw educational material.
    Type: Application
    Filed: July 1, 2002
    Publication date: January 16, 2003
    Applicant: Saga University
    Inventors: Shigeru Hoyashita, Yasuyuki Ikegami, Kazuhiro Sumi
  • Publication number: 20020197595
    Abstract: A system is provided for utilizing educational materials. The system has a registration part for prompting to input at least one code (such as a subject code for expressing a subject of an educational material) to store said educational material with said inputted code in an educational material database, a code receiving part for receiving code inputted by a developer or a user, and an educational material transmitting part for reading out an educational material corresponding to said received code from a database in accordance with the received code to transmit the educational material to the developer or the user.
    Type: Application
    Filed: May 21, 2002
    Publication date: December 26, 2002
    Applicant: Saga University
    Inventors: Shigeru Hoyashita, Yasuyuki Ikegami, Kazuhiro Sumi
  • Patent number: 6375852
    Abstract: This invention relates to an adsorbent made up of calix [4] arene polymer having a repeating unit, a method of separating divalent lead ions shown by the following chemical formula and a method of manufacturing the same.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: April 23, 2002
    Assignee: Saga University
    Inventors: Katsutoshi Inoue, Keisuke Ohto, Shinya Wakisaka, Takaaki Shinohara
  • Patent number: 6315646
    Abstract: A processing system for increasing the quality of a gear having a shot peening apparatus for subjecting, to shot peening, a gear after tooth-forming and surface hardening; a barreling apparatus positioned adjacently to the shot peening apparatus, for subjecting, to barreling, the gear which has been subject to shot peening by the shot peening apparatus; and a gear feeding apparatus positioned adjacently to the shot peening apparatus and the barreling apparatus, for feeding, to the barreling apparatus, the gear which has been subjected to the shot peening by the shot peening apparatus. Thus, a gear of high quality can be efficiently produced, and the working environment can be cleaned at low cost by a dust collecting apparatus.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: November 13, 2001
    Assignee: Saga University
    Inventor: Shigeru Hoyashita
  • Patent number: 6057145
    Abstract: A host fungus of a fungivorous nematode is inoculated on a solid medium or an artificial liquid medium containing an industrial vegetable waste or by-product, and then the nematode whose whole body have been sterilized is inoculated and mass-cultivated. Fungivorous ability of the nematode can be kept by subculturing using different host fungus on every culturing stage. The nematodes, when maintained about 10 days in an aerobic condition at 20-25.degree. C. with a relative humidity gradually inclined from high to low and dried to anhydrobiotic conditions, can be preserved for a long time. The nematode can be used for biological control of soil pathogens and soil insect pests.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: May 2, 2000
    Assignee: Saga University
    Inventor: Nobuyoshi Ishibashi
  • Patent number: 5617738
    Abstract: The present invention relates to an energy converter for transferring thermal energy from a low heat source to a high heat source using a mixed medium for the purposes of increasing thermal energy transfer efficiency. The present invention improves performance of an evaporator and a condenser, reduces production cost of the device, improves performance over a wide range even with partial loads, and provides a highly efficient and polyfunctional energy converter having function as a refrigerator and a heat pump with one cycle, and function as a generator.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: April 8, 1997
    Assignee: Saga University
    Inventors: Yasuyuki Ikegami, Haruo Uehara
  • Patent number: 5588297
    Abstract: A thermal power generator includes a high heat source pump, and cold working fluid pumps. An evaporator heat exchanges a high heat source fluid and a warmed working fluid. A liquid-vapor separator is connected to the evaporator. A first stage turbine is connected to the liquid-vapor separator. A second stage turbine is connected to the first stage turbine. A heater is connected to the first stage turbine, and receives remaining vapor working fluid, and the cold-working fluid to heat exchange the fluids. A tank stores and mixes the working fluids discharged from the heater, and supplies the stored working fluid to the first cold working fluid pump. A regenerator receives the liquid working fluid from the separator, and the cold working fluid, and forms a regenerated working fluid, and a warmed working fluid discharged to the evaporator. An absorber is connected to the second stage turbine and the regenerator. A reducing valve is located between the absorber and regenerator.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: December 31, 1996
    Assignee: Saga University
    Inventors: Haruo Uehara, Yasuyuki Ikegami
  • Patent number: 4658890
    Abstract: A condenser is provided with a heat exchanger which is rotated in an airtight cylindrical vessel filled with a fluid to be condensed. The rotated heat exchanger has a structure almost similar to a rotor of a steam turbine, namely, has a structure formed of plural pairs of hollow blades arranged individually opposite to each other on both sidewalls of an elongated rectangular hollow axle rotated in the fluid to be condensed, all of those hollows being communicated with each other, so as to circulate a coolant therethrough. As a result, the fluid to be condensed always uniformly contacts with the coolant through surfaces of the blades with an extremely high performance of condensation.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: April 21, 1987
    Assignee: Saga University
    Inventors: Haruo Uehara, Tsutomu Nakaoka
  • Patent number: 4628212
    Abstract: An oceano-thermosteric power plant is provided with plural evaporators and plural condensers, alternate parts of which are not operated at night and in winter on light load and hence a high efficiency heat exchange can be maintained. During the period that selected condensers and evaporators are not in service, excess cold water from the out-of-service condensers is circulated through the out-of-service evaporators in the opposite direction and hence the filth deposited inside the out-of-service evaporators can be washed away.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: December 9, 1986
    Assignee: Saga University
    Inventors: Haruo Uehara, Tsutomu Nakaoka