Patents by Inventor Naoki Tsuruoka

Naoki Tsuruoka 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: 9357702
    Abstract: An engine-powered work tool includes: a shaft extending in a first direction; an engine at a rear end portion of the shaft; a fuel tank disposed below the engine in a second direction perpendicular to the first direction; and a stand fixed to the engine. The stand includes a fastening portion fixed to a front end portion of the engine, and a curved portion extending from the fastening portion and curving toward a rear end portion of the engine. The curved portion provides a lower end portion positioned downstream of a bottom end portion of the fuel tank in the second direction. The lower end portion has a distal end positioned upstream of the rear end portion of the fuel tank in the first direction, the distal end and the bottom end of the fuel tank defining a gap therebetween in the second direction.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: June 7, 2016
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hideki Watanabe, Naoki Tsuruoka, Masayoshi Goto, Takeshi Matsuoka, Hiroyuki Hasegawa, Norihide Tao
  • Publication number: 20150047210
    Abstract: An engine-powered work tool includes: a shaft extending in a first direction; an engine at a rear end portion of the shaft; a fuel tank disposed below the engine in a second direction perpendicular to the first direction; and a stand fixed to the engine. The stand includes a fastening portion fixed to a front end portion of the engine, and a curved portion extending from the fastening portion and curving toward a rear end portion of the engine. The curved portion provides a lower end portion positioned downstream of a bottom end portion of the fuel tank in the second direction. The lower end portion has a distal end positioned upstream of the rear end portion of the fuel tank in the first direction, the distal end and the bottom end of the fuel tank defining a gap therebetween in the second direction.
    Type: Application
    Filed: August 13, 2014
    Publication date: February 19, 2015
    Inventors: Hideki Watanabe, Naoki Tsuruoka, Masayoshi Goto, Takeshi Matsuoka, Hiroyuki Hasegawa, Norihide Tao
  • Patent number: 8935856
    Abstract: According to an aspect of the present invention, there is provided a chain saw including: an engine having: a crankcase; a cylinder attached to the crankcase; and a piston configured to reciprocate in the cylinder; a housing configured to accommodate the engine; and a guide bar, around which a saw chain is to be wound so as to be rotated by the engine, the guide bar being attached to the housing, wherein the engine has two surfaces substantially parallel to an axis direction of a crankshaft, the two surfaces being covered with and fixed to the housing, and wherein the engine is fixed to the housing with a fixing member at a side where the guide bar is attached to the housing.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: January 20, 2015
    Assignee: Hitachi Koki Co., Ltd.
    Inventor: Naoki Tsuruoka
  • Publication number: 20110072671
    Abstract: According to an aspect of the present invention, there is provided a chain saw including: an engine having: a crankcase; a cylinder attached to the crankcase; and a piston configured to reciprocate in the cylinder; a housing configured to accommodate the engine; and a guide bar, around which a saw chain is to be wound so as to be rotated by the engine, the guide bar being attached to the housing, wherein the engine has two surfaces substantially parallel to an axis direction of a crankshaft, the two surfaces being covered with and fixed to the housing, and wherein the engine is fixed to the housing with a fixing member at a side where the guide bar is attached to the housing.
    Type: Application
    Filed: May 22, 2009
    Publication date: March 31, 2011
    Applicant: HITACHI KOKI CO., LTD.,
    Inventor: Naoki Tsuruoka
  • Publication number: 20070005818
    Abstract: An apparatus for managing a load on a plurality of processors that performs a processing of data received by a plurality of channel adaptors includes a channel-adaptor communicating unit that detects operational statuses of the channel adaptors, and that selects a processor that performs the processing of the data, based on the operational statuses of the channel adaptors.
    Type: Application
    Filed: September 29, 2005
    Publication date: January 4, 2007
    Applicant: FUJITSU LIMITED
    Inventors: Naoki Tsuruoka, Osamu Kimura, Koji Yamaguchi, Chikashi Maeda
  • Patent number: 6465236
    Abstract: Bacillus sp. NTAP-1 having been deposited under accession number FERM BP-6926; and a collagen-decomposing enzyme produced by bacterium. The above enzyme (1) has a capability of hydrolyzing, at the highest efficiency, collagen and gelatin from among casein, gelatin, albumin and collagen; (2) shows the optimum pH of 3.5 to 4.5; (3) shows the optimum temperature of 65 to 70° C.; (4) after heating at 60° C. at pH 6.0 for 4 hours, sustains an activity amounting to 60% or more of the level before the heat treatment; (5) remains stable at pH 3 to 6; and a molecular weight of approximately 46,000 when measured by SDS-PAGE.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: October 15, 2002
    Assignee: Japan Science and Technology Corporation
    Inventors: Tokuzo Nishino, Toru Nakayama, Naoki Tsuruoka, Minoru Akai
  • Patent number: 6279521
    Abstract: A two-cycle engine includes scavenging passages on the cylinder side and the crankcase side as the passages to supply scavenging gas into the cylinder. The passage on the cylinder side includes a passage inside the cylinder sidewall having substantially the same inner diameter as that of the opening area of the scavenging charge port, while the passage on the crankcase side includes a space between the inner peripheral surface at the top end of the crankcase and the outer peripheral surface of the piston, and a connection means provided between the top end of the space and the lower end of the scavenger passage of the cylinder. As the fuel mixture in the crank chamber flows into the scavenging passage on the cylinder side through the narrow space of the passage on the crankcase side and the connection means, the rapid inflow of the fuel mixture into the cylinder is restrained and the supply of the fuel mixture is sustained constantly high until the latter half of the scavenging time.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: August 28, 2001
    Assignee: Tanaka Kogyo Co., Ltd.
    Inventors: Shigetoshi Ishida, Naoki Tsuruoka, Yasuhiro Sensui