Patents by Inventor Yoshikatsu Tomita

Yoshikatsu Tomita 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: 7908935
    Abstract: The inventors perfected the present invention upon finding that a conventional fecal sampling stick is given a hollow structure that has openings a certain distant apart, permitting in aspiration through the capillary tube phenomenon. That is, the present invention is a feces collection container for collecting faeces as an analyte, which comprises a fecal sampling stick which has a holding part (11) at a base, a fecal sampling part (12) at a tip and is formed a hollow passage with openings at the tip and on the base side a predetermined distance from the tip.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: March 22, 2011
    Assignee: Nipro Corporation
    Inventors: Mitsuru Hasegawa, Yoshikatsu Tomita, Seiji Okamoto
  • Publication number: 20100000341
    Abstract: The inventors perfected the present invention upon finding that a conventional fecal sampling stick is given a hollow structure that has openings a certain distant apart, permitting in aspiration through the capillary tube phenomenon. That is, the present invention is a feces collection container for collecting faeces as an analyte, which comprises a fecal sampling stick which has a holding part (11) at a base, a fecal sampling part (12) at a tip and is formed a hollow passage with openings at the tip and on the base side a predetermined distance from the tip.
    Type: Application
    Filed: December 15, 2006
    Publication date: January 7, 2010
    Applicant: NIPRO CORPORATION
    Inventors: Mitsuru Hasegawa, Yoshikatsu Tomita, Seiji Okamoto
  • Patent number: 7597691
    Abstract: A liquid storage bag having a partition wall allowed to be peeled easily and not peeled by an accidental drop, etc. The liquid storage bag is one wherein the upper part thereof is closed with a freely and closable zipper, the bottom thereof is provided with a liquid outlet, and an easily peelable partition wall (a weak seal part) is provided close to the zipper. The internal space of the liquid storage bag is divided liquid-tightly into upper and lower parts through this weak seal part, liquid is stored in the lower part of the internal space (liquid storage chamber), and the weak seal part is formed in outside-convex form at a center and increased in width at both end parts thereof.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: October 6, 2009
    Assignees: Ajinomoto Co., Inc., Nipro Corporation
    Inventors: Yumi Kawaguchi, Toru Ikeda, Yoshihiro Kobayashi, Shozo Taguchi, Yoshikatsu Tomita
  • Patent number: 7437882
    Abstract: An apparatus for driving a compressor comprises a compressor having a compression mechanism part for sucking a fluid to compress the same, and an electric motor for driving the compression mechanism part, and an inverter device for driving the electric motor at variable speeds. The electric motor comprises a self-starting type electric motor having a rotor, which comprises a cage conductor and a polarized permanent magnet, and the inverter device comprises a plurality of semiconductor switches for controlling drive frequencies of the electric motor.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: October 21, 2008
    Assignee: Hitachi Air Conditioning Systems Co., Ltd.
    Inventors: Mutsunori Matsunaga, Kenji Tojo, Yoshikatsu Tomita, Susumu Nakayama, Syunsuke Yasunori
  • Publication number: 20050268631
    Abstract: An apparatus for driving a compressor comprises a compressor having a compression mechanism part for sucking a fluid to compress the same, and an electric motor for driving the compression mechanism part, and an inverter device for driving the electric motor at variable speeds. The electric motor comprises a self-starting type electric motor having a rotor, which comprises a cage conductor and a polarized permanent magnet, and the inverter device comprises a plurality of semiconductor switches for controlling drive frequencies of the electric motor.
    Type: Application
    Filed: May 13, 2005
    Publication date: December 8, 2005
    Inventors: Mutsunori Matsunaga, Kenji Tojo, Yoshikatsu Tomita, Susumu Nakayama, Syunsuke Yasunori
  • Patent number: 6925824
    Abstract: An apparatus for driving a compressor comprises a compressor having a compression mechanism part for sucking a fluid to compress the same, and an electric motor for driving the compression mechanism part, and an inverter device for driving the electric motor at variable speeds. The electric motor comprises a self-starting type electric motor having a rotor, which comprises a cage conductor and a polarized permanent magnet, and the inverter device comprises a plurality of semiconductor switches for controlling drive frequencies of the electric motor.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: August 9, 2005
    Inventors: Mutsunori Matsunaga, Kenji Tojo, Yoshikatsu Tomita, Susumu Nakayama, Syunsuke Yasunori
  • Publication number: 20040159115
    Abstract: An apparatus for driving a compressor comprises a compressor having a compression mechanism part for sucking a fluid to compress the same, and an electric motor for driving the compression mechanism part, and an inverter device for driving the electric motor at variable speeds. The electric motor comprises a self-starting type electric motor having a rotor, which comprises a cage conductor and a polarized permanent magnet, and the inverter device comprises a plurality of semiconductor switches for controlling drive frequencies of the electric motor.
    Type: Application
    Filed: September 8, 2003
    Publication date: August 19, 2004
    Inventors: Mutsunori Matsunaga, Kenji Tojo, Yoshikatsu Tomita, Susumu Nakayama, Syunsuke Yasunori
  • Publication number: 20030148004
    Abstract: According to the present invention, there is provided a liquid storage bag having a partition wall allowed to be peeled easily and not peeled by an accidental drop, etc.
    Type: Application
    Filed: October 24, 2002
    Publication date: August 7, 2003
    Inventors: Yumi Kawaguchi, Toru Ikeda, Yoshihiro Kobayashi, Shozo Taguchi, Yoshikatsu Tomita
  • Patent number: 6286334
    Abstract: The refrigerating apparatus of the invention has a scroll compressor having a compressing section sucking and compressing a hydrofluorocarbon-based refrigerant, a condenser and the like, in which a plain bearing slidably supporting a driving shaft driving the compressing section of the scroll compressor is made of a material containing lead, and an ether oil miscible with the refrigerant used in a refrigerant circuit is used as a lubricant for lubricating the plain bearing.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: September 11, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Tojo, Hideyuki Ueda, Yoshikatsu Tomita, Takao Mizuno
  • Patent number: 6055827
    Abstract: The refrigerating apparatus of the invention has a scroll compressor having a compressing section sucking and compressing a hydrofluorocarbon-based refrigerant, a condenser and the like, in which a plain bearing slidably supporting a driving shaft driving the compressing section of the scroll compressor is made of a material containing lead, and an ether oil miscible with the refrigerant used in a refrigerant circuit is used as a lubricant for lubricating the plain bearing.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: May 2, 2000
    Assignee: Hitachi, Ltd
    Inventors: Kenji Tojo, Hideyuki Ueda, Yoshikatsu Tomita, Takao Mizuno
  • Patent number: 6006542
    Abstract: The refrigerating apparatus of the invention has a scroll compressor having a compressing section sucking and compressing a hydrofluorocarbon-based refrigerant, a condenser and the like, in which a plain bearing slidably supporting a driving shaft driving the compressing section of the scroll compressor is made of a material containing lead, and an ether oil miscible with the refrigerant used in a refrigerant circuit is used as a lubricant for lubricating the plain bearing.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: December 28, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Tojo, Hideyuki Ueda, Yoshikatsu Tomita, Takao Mizuno
  • Patent number: 4749344
    Abstract: An oil feeding device for a scroll fluid apparatus. A fixed scroll member is associated with an orbiting scroll member. A crankshaft rotatably supported by a bearing of a frame has a crank portion engaging with a plain bearing of the orbiting scroll member. A variable speed driving motor is connected to the crankshaft. An oil feeding passageway is provided in the crankshaft and the crank portion. Oil is supplied to the plain bearing of the orbiting scroll member through a space at the end face of the crank portion. An oil flow passage is provided in parallel with the axis and in a surface of the crank portion located at a position advanced through approximately 45 degrees toward the rotational direction of the crank portion, from a position at which the load acting radially of the shaft due to the centrifugal force caused by the orbiting motion of the orbiting scroll member is applied to the crank portion of the shaft.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: June 7, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Yoshikatsu Tomita, Katsuaki Kikuchi, Eiichi Hazaki, Tetsuya Arata, Masao Shiibayashi, Kazutaka Suefuji, Takao Senshu, Akira Murayama
  • Patent number: 4557675
    Abstract: A scroll-type fluid machine having an orbiting scroll member and a stationary scroll member each having an end plate and a spiral wrap of at least two turns protruding upright from one of the sides of the end plates. The orbiting scroll member has a back pressure chamber formed on the back side thereof and communicating with the compression spaces of the fluid machine through pressure equalizing ports formed in the orbiting scroll member, so that the pressure of the fluid under compression is introduced to the back pressure chamber to produce an axial thrusting force for pressing the orbiting scroll member towards the stationary scroll member. The positions of the pressure equalizing ports in terms of the wrap angle .lambda. of the wraps are selected to meet the following condition:.lambda.d>.lambda.>.lambda.d-2.pi.,where, .lambda.d represents the wrap angle of the wraps when the volume of the compression spaces is minimized. The equalizing ports are positioned at .lambda. and .lambda.+2 .pi..
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: December 10, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Akira Murayama, Hiroaki Kuno, Naoshi Uchikawa, Takahiro Tamura, Takao Mizuno, Sumihisa Kotani, Yoshikatsu Tomita, Tetsuya Arata, Masao Shiibayashi, Kazutaka Suefuji
  • Patent number: 4382370
    Abstract: A refrigerating system including a refrigeration circuit and a scroll type compressor provided with two volume control mechanisms to allow the system to selectively perform full load operation and unloaded operation. The scroll type compressor includes two scroll members of known construction meshing with each other to define compression chambers and a suction chamber and is combined with the refrigeration circuit having an outdoor heat exchanger, an expansion valve, an indoor heat exchanger and a four-way change-over valve to provide a heat pump type refrigerating system. The volume control mechanisms each include a pair of bypass apertures in the fixed scroll member communicating with a valve chamber having a valve member slidably mounted therein and normally biased to an open position by a spring. The bypass apertures, of which one communicates with the suction chamber and the other communicates with one of the compression chambers, and the valve chamber constitute a bypass passageway.
    Type: Grant
    Filed: October 21, 1981
    Date of Patent: May 10, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Kazutaka Suefuji, Tetsuya Arata, Yoshikatsu Tomita, Sumihisa Kotani, Naoshi Uchikawa, Akira Murayama