Patents by Inventor Hikaru Nakajima

Hikaru Nakajima 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: 11799182
    Abstract: The high-frequency transmission line is configured by stacking conductor layers and an insulating layer, and is provided with: a signal via, which extends in a stacking direction and electrically connects the conductor layers together; an input line, which is arranged in one of the conductor layers and inputs an electrical signal to the signal via; a signal line, which is arranged in another one of the conductor layers and is connected to the input line through the signal via; a ground plane, which is arranged in any one of the conductor layers; a conductor arm arranged within a separation region that separates the signal via and the ground plane; and a conductor connection arranged within the separation region and connecting the conductor arm and the ground plane. The conductor arm and the conductor connection are configured to suppress an electrical signal of a predetermined frequency within an electrical signal.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: October 24, 2023
    Assignees: FURUKAWA ELECTRIC CO., LTD., FURUKAWA AUTOMOTIVE SYSTEMS INC.
    Inventors: Noritaka Murofushi, Hikaru Nakajima
  • Publication number: 20210021010
    Abstract: The high-frequency transmission line is configured by stacking conductor layers and an insulating layer, and is provided with: a signal via, which extends in a stacking direction and electrically connects the conductor layers together; an input line, which is arranged in one of the conductor layers and inputs an electrical signal to the signal via; a signal line, which is arranged in another one of the conductor layers and is connected to the input line through the signal via; a ground plane, which is arranged in any one of the conductor layers; a conductor arm arranged within a separation region that separates the signal via and the ground plane; and a conductor connection arranged within the separation region and connecting the conductor arm and the ground plane. The conductor arm and the conductor connection are configured to suppress an electrical signal of a predetermined frequency within an electrical signal.
    Type: Application
    Filed: November 7, 2018
    Publication date: January 21, 2021
    Applicants: FURUKAWA ELECTRIC CO., LTD., FURUKAWA AUTOMOTIVE SYSTEMS INC.
    Inventors: Noritaka MUROFUSHI, Hikaru NAKAJIMA
  • Patent number: 10407448
    Abstract: The purpose of the present invention is to provide an N,N-bis(2-dialkylphosphinoethyl)amine-borane complex which is a ruthenium complex that exhibits excellent catalytic activity in a hydrogenation reaction, etc., and a production method therefor, and a method for efficiently producing a ruthenium complex containing N,N-bis(2-dialkylphosphinoethyl)amine as a ligand. The present invention is capable of efficiently producing an amine-borane complex (3) by reacting an oxazolidinone compound (1) with a dialkylphosphine-borane compound (2) in the presence of a base. The present invention is also capable of efficiently producing a ruthenium complex (5) by reacting the amine-borane complex (3) with a ruthenium compound (4) in the presence of an amine. (In the formula, a solid line, a dashed line, B, C, H, L1-L3, LG, n, N, O, P, Ru, X, and R1-R10 are as defined in the description.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: September 10, 2019
    Assignee: Takasago International Corporation
    Inventors: Yuji Nakayama, Hikaru Nakajima
  • Publication number: 20190040090
    Abstract: The purpose of the present invention is to provide an N,N-bis(2-dialkylphosphinoethyl)amine-borane complex which is a ruthenium complex that exhibits excellent catalytic activity in a hydrogenation reaction, etc., and a production method therefor, and a method for efficiently producing a ruthenium complex containing N,N-bis(2-dialkylphosphinoethyl)amine as a ligand. The present invention is capable of efficiently producing an amine-borane complex (3) by reacting an oxazolidinone compound (1) with a dialkylphosphine-borane compound (2) in the presence of a base. The present invention is also capable of efficiently producing a ruthenium complex (5) by reacting the amine-borane complex (3) with a ruthenium compound (4) in the presence of an amine. (In the formula, a solid line, a dashed line, B, C, H, L1-L3, LG, n, N, O, P, Ru, X, and R1-R10 are as defined in the description.
    Type: Application
    Filed: January 30, 2017
    Publication date: February 7, 2019
    Inventors: Yuji Nakayama, Hikaru Nakajima
  • Patent number: 7458448
    Abstract: A hydraulic shock absorber in which the flow of hydraulic fluid induced in each of extension and compression hydraulic fluid passages, by sliding movement of a piston, is controlled by a main disk valve to generate damping force. The valve opening pressure of the main disk valve is adjusted by the pressure in a back-pressure chamber. In a low piston speed region, the main disk valve closes a back-pressure chamber inlet passage. Therefore, the pressure in the backpressure chamber will not rise, and sufficiently small damping force is obtained. When the main disk valve opens, the backpressure chamber inlet passage opens simultaneously. Consequently, the pressure in the backpressure chamber rises, and the damping force increases.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: December 2, 2008
    Assignees: Hitachi, Ltd., Nissan Motor Co., Ltd.
    Inventors: Hajime Katou, Hikaru Nakajima, Takao Nakadate
  • Publication number: 20050263363
    Abstract: In the disclosed hydraulic shock absorber, the flow of hydraulic fluid induced in each of extension and compression hydraulic fluid passages by sliding movement of a piston is controlled by a main disk valve to generate damping force. The valve opening pressure of the main disk valve is adjusted by the pressure in a back-pressure chamber. In a low piston speed region, the main disk valve closes a back-pressure chamber inlet passage. Therefore, the pressure in the back-pressure chamber will not rise, and sufficiently small damping force is obtained. When the main disk valve opens, the back-pressure chamber inlet passage opens simultaneously. Consequently, the pressure in the back-pressure chamber rises, and the damping force increases.
    Type: Application
    Filed: May 23, 2005
    Publication date: December 1, 2005
    Inventors: Hajime Katou, Hikaru Nakajima, Takao Nakadate
  • Patent number: 6179328
    Abstract: A vehicle suspension apparatus includes an axle. The axle includes a pair of trailing arms with a transverse beam. Resilient bushings connect the forward ends of the trailing arms to the vehicle superstructure. A linkage mechanism connects the beam to the vehicle superstructure. Under force causing lateral displacement of the axle, the linkage mechanism induces moment on the beam to counteract oversteer tendency due to the lateral displacement of the axle.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: January 30, 2001
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenji Kawagoe, Hikaru Nakajima, Yukihiro Suetsugu