Patents by Inventor Hiroyuki Muraoka

Hiroyuki Muraoka 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).

  • Publication number: 20240133156
    Abstract: A hydraulic excavator as an electric work machine includes: an electric motor; a battery unit that stores electric power for driving the electric motor; a hydraulic oil tank that contains hydraulic oil, and a hydraulic pump that is driven by the electric motor and connected to the hydraulic oil tank. The electric motor, the hydraulic pump, and the hydraulic oil tank are arranged below the battery unit on a machine body frame, and are arranged side by side in a lateral direction of the machine body frame.
    Type: Application
    Filed: October 12, 2023
    Publication date: April 25, 2024
    Applicant: Yanmar Holdings Co., Ltd.
    Inventors: Hiroyuki Muraoka, Mitsuyuki Hatanaka
  • Publication number: 20220364332
    Abstract: To make it easier for an operator to notice an object in the surroundings of a construction machine. A safety monitoring system includes a detection device, a display unit, and a control unit. The detection device detects an object in the surroundings of the work vehicle. The display unit displays a captured image of the surroundings of the work vehicle. The control unit controls the detection device and the display unit. If the detection device detects an object, the control unit controls the display unit to display an image with a defined edge obtained by applying an edge-defining process to the image of the surroundings.
    Type: Application
    Filed: May 13, 2022
    Publication date: November 17, 2022
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventors: Yoshihisa Ishikawa, Hiroyuki Muraoka, Hiromu Nagata, Kotaro Matsuishi
  • Patent number: 9054139
    Abstract: In a chemical liquid supplying apparatus 10a for discharging chemical liquid by expanding and contracting a pump chamber 16 which communicates with a chemical liquid inlet 21 and a chemical liquid outlet 22, the apparatus has a cylinder 12 in which a piston 31 is accommodated and reciprocally movable in an axial direction. A bellows 35 which is elastically deformable in the axial direction is mounted to a cylinder hole 30 between the tip of a connection rod 34 and the cylinder 12. On the inside of the bellows 35, an expanding/contracting chamber 37 is formed as a compartment between the connection rod 34 and the bellows 35, a pressure chamber 38 which communicates with the expanding/contracting chamber 37 is provided on the tip side of the piston 31, and an incompressible indirect medium 39 is enclosed in the expanding/contracting chamber 37 and the pressure chamber 38.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: June 9, 2015
    Assignee: Koganei Corporation
    Inventor: Hiroyuki Muraoka
  • Publication number: 20130101444
    Abstract: In a chemical liquid supplying apparatus 10a for discharging chemical liquid by expanding and contracting a pump chamber 16 which communicates with a chemical liquid inlet 21 and a chemical liquid outlet 22, the apparatus has a cylinder 12 in which a piston 31 is accommodated and reciprocally movable in an axial direction. A bellows 35 which is elastically deformable in the axial direction is mounted to a cylinder hole 30 between the tip of a connection rod 34 and the cylinder 12. On the inside of the bellows 35, an expanding/contracting chamber 37 is formed as a compartment between the connection rod 34 and the bellows 35, a pressure chamber 38 which communicates with the expanding/contracting chamber 37 is provided on the tip side of the piston 31, and an incompressible indirect medium 39 is enclosed in the expanding/contracting chamber 37 and the pressure chamber 38.
    Type: Application
    Filed: January 31, 2011
    Publication date: April 25, 2013
    Applicant: KOGANEI CORPORATION
    Inventor: Hiroyuki Muraoka
  • Publication number: 20100332932
    Abstract: In a method of performing a test on a logic circuit in accordance with an exemplary aspect of the present invention, the test is performed by supplying a clock signal from a clock supply circuit to a plurality of clock domains operating by a clock signal of a same frequency. The method includes calculating a number of test patterns of each of the plurality of internal clock domains; classifying the plurality of clock domains into a plurality of groups based on the calculated number of test patterns; and assigning a clock supply circuit independently to each of the groups into which the clock domains are classified.
    Type: Application
    Filed: May 5, 2010
    Publication date: December 30, 2010
    Applicant: NEC ELECTRONICS CORPORATION
    Inventor: Hiroyuki MURAOKA
  • Patent number: 6678739
    Abstract: A method for compressing a test pattern set including test patterns arranged in a specific order to detect faults in a logic circuit is provided, which compresses efficiently (i.e., at high compressibility) the test pattern sets of the logic circuits.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: January 13, 2004
    Assignee: NEC Electronics Corporation
    Inventor: Hiroyuki Muraoka