Patents by Inventor Takashi Ooniwa

Takashi Ooniwa 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).

  • Two-cycle engine
    Patent number: 8113155
    Abstract: A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: February 14, 2012
    Assignee: Husqvarna Zenoah Co., Ltd.
    Inventors: Takashi Ooniwa, Hideo Koizumi
  • Two-Cycle Engine
    Publication number: 20090050124
    Abstract: A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved.
    Type: Application
    Filed: March 6, 2007
    Publication date: February 26, 2009
    Applicant: Husqvarna Zehoah Co., Ltd
    Inventors: Takashi Ooniwa, Hideo Koizumi
  • Portable engine unit
    Patent number: 4727828
    Abstract: A portable engine unit is provided. The unit comprises an engine including a clutch, a crankcase enclosing a crank shaft, an engine cylinder enclosing a piston and a piston rod, a carburetor, an air filter, a recoil starter, and a muffler; and a housing for enclosing the engine, comprising at least two portions which are assembled and disassembled along a plane including the axis of rotation of an output shaft of the engine to enclose and expose the engine.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: March 1, 1988
    Assignee: Komatsu Zenoah Company
    Inventors: Tetsuo Ueno, Katsumi Kiyooka, Hideko Inomata, Akira Gamoh, Keiko Iramina, Takashi Ooniwa