Patents by Inventor Akira Hiratsuka

Akira Hiratsuka 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: 20240035722
    Abstract: A compressor oil separator installed in a cryogenic refrigerator compressor includes a first tube that extends in a vertical direction. The first tube includes a first communication portion that connects an inside of the first tube to an outside of the first tube. The compressor oil separator also includes a delivery pipe that extends in the vertical direction and is configured to deliver refrigerant, including oil, to the inside of the first tube. The compressor oil separator also includes a filter located between the first tube and the delivery pipe in a cross section intersecting the vertical direction. The delivery pipe includes a delivery port that delivers the refrigerant to the inside of the first tube, the delivery port being located downward from a middle part of the first tube in the vertical direction.
    Type: Application
    Filed: December 27, 2021
    Publication date: February 1, 2024
    Applicant: Ulvac Cryogenics Incorporated
    Inventors: Akira Hiratsuka, Kohei Yoshino, Masayuki Furukawa, Toshio Harayama
  • Patent number: 10138966
    Abstract: One embodiment provides a vehicle brake apparatus, including: an electric actuator; and a drum brake. The drum brake is attached to a wheel so as to be driven by power exhibited by the electric actuator. In a state of being mounted on a vehicle, the electric actuator is disposed and fixed further rearwards than an axle of the wheel.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: November 27, 2018
    Assignee: NISSIN KOGYO CO., LTD.
    Inventors: Koji Usui, Toshiaki Mitani, Hiroo Kawakami, Akira Hiratsuka
  • Publication number: 20150260245
    Abstract: One embodiment provides a vehicle brake apparatus, including: an electric actuator; and a drum brake. The drum brake is attached to a wheel so as to be driven by power exhibited by the electric actuator. In a state of being mounted on a vehicle, the electric actuator is disposed and fixed further rearwards than an axle of the wheel.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 17, 2015
    Inventors: Koji USUI, Toshiaki MITANI, Hiroo KAWAKAMI, Akira HIRATSUKA
  • Patent number: 8281909
    Abstract: A vehicle drum brake includes: a first brake shoe; a second brake shoe; a parking brake lever connected with the second brake shoe; a pull unit connected with the parking brake lever; a strut including a curved portion which is curved towards an outer circumferential side of the backing plate, the strut being disposed between a portion of the parking brake lever which lies closer to the portion where the pull mechanism is connected than the portion where the parking brake lever is attached and the first brake shoe; a strut return spring for returning the strut in a non-operating state to its initial position is provided to extend between the strut and the second brake shoe; and an engagement hole formed in the curved portion of the strut for one end portion of the strut return spring to be brought into engagement therewith.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: October 9, 2012
    Assignee: Nissin Kogyo Co., Ltd.
    Inventor: Akira Hiratsuka
  • Publication number: 20110114429
    Abstract: A vehicle drum brake includes: a first brake shoe; a second brake shoe; a parking brake lever connected with the second brake shoe; a pull unit connected with the parking brake lever; a strut including a curved portion which is curved towards an outer circumferential side of the backing plate, the strut being disposed between a portion of the parking brake lever which lies closer to the portion where the pull means is connected than the portion where the parking brake lever is attached and the first brake shoe; a strut return spring for returning the strut in a non-operating state to its initial position is provided to extend between the strut and the second brake shoe; and an engagement hole formed in the curved portion of the strut for one end portion of the strut return spring to be brought into engagement therewith.
    Type: Application
    Filed: November 10, 2010
    Publication date: May 19, 2011
    Applicant: NISSIN KOGYO CO., LTD.
    Inventor: Akira HIRATSUKA
  • Patent number: 7823560
    Abstract: A straddle-type vehicle includes an engine, an air intake pipe, a throttle valve being controlled in accordance with an operation amount of an accelerator grip, an engine rotating speed detector or a vehicle speed detector, and an electronic control unit (ECU). The ECU increases the opening degree of the throttle valve or maintains the opening degree at a constant value until the engine rotating speed reaches a set rotating speed which is smaller than a prescribed rotating speed, but if the engine rotating speed exceeds the set rotating speed, the ECU reduces the opening degree of the throttle valve irrespective of operation of the accelerator grip.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: November 2, 2010
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yoshitomi Nakagawa, Akira Hiratsuka, Yuuichirou Watanabe
  • Patent number: 7779972
    Abstract: A parking brake system is provided in which a parking brake state is obtained by forward movement of a parking piston in response to the action of a parking control fluid pressure, and a forward operating state of the parking piston is mechanically locked by a lock mechanism. Moreover, an input member of a brake mechanism and the parking piston are connected by a coupling linkage. A lock piston of the lock mechanism moves toward one side in the axial direction when the parking piston moves forward, and a locking part provided at one end of the lock piston engages from the rear with a retaining part provided on a middle section of the coupling linkage while straddling the middle section of the coupling. This enables an automatic parking brake state to be obtained by a simple structure without consuming power.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: August 24, 2010
    Assignees: Honda Motor Co., Ltd., Nissin Kogyo Co., Ltd.
    Inventors: Hiromi Inagaki, Akira Hiratsuka
  • Publication number: 20090260908
    Abstract: A straddle-type vehicle includes an engine, an air intake pipe, a throttle valve being controlled in accordance with an operation amount of an accelerator grip, an engine rotating speed detector or a vehicle speed detector, and an electronic control unit (ECU). The ECU increases the opening degree of the throttle valve or maintains the opening degree at a constant value until the engine rotating speed reaches a set rotating speed which is smaller than a prescribed rotating speed, but if the engine rotating speed exceeds the set rotating speed, the ECU reduces the opening degree of the throttle valve irrespective of operation of the accelerator grip.
    Type: Application
    Filed: April 3, 2009
    Publication date: October 22, 2009
    Inventors: Yoshitomi Nakagawa, Akira Hiratsuka, Yuuichirou Watanabe
  • Publication number: 20070193838
    Abstract: A parking brake system is provided in which a parking brake state is obtained by forward movement of a parking piston (33) in response to the action of a parking control fluid pressure, and a forward operating state of the parking piston (33) is mechanically locked by a lock mechanism (43). Moreover, an input member (23) of a brake mechanism (11) and the parking piston (33) are connected by coupling means (35), a lock piston (44) of the lock mechanism (43) moves toward one side in the axial direction when the parking piston (33) moves forward, and a locking part (46) provided at one end of the lock piston (44) engages from the rear with a retaining part (45) provided on a middle section of the coupling means (35) while straddling the middle section of the coupling means (35). This enables an automatic parking brake state to be obtained by a simple structure without consuming power.
    Type: Application
    Filed: March 30, 2005
    Publication date: August 23, 2007
    Inventors: Hiromi Inagaki, Akira Hiratsuka
  • Patent number: 6203093
    Abstract: A motorcycle features an improved fairing. The fairing generally comprises a forward panel and a rear panel. The forward panel includes an aperture for a headlight while the rear panel includes apertures for gauges and speakers. By removing the forward panel, a mounting stay and a cavity are revealed. The headlight and the various features secured in the rear panel are mounted to the stay within the cavity. The stay is connected to the frame of the motorcycle and carries the weight of the fairing. An engaging member positively locates the headlight within the forward panel of the fairing when the forward panel is reattached to the motorcycle following maintenance. When the forward panel removed for maintenance, an opening is provided into the cavity defined between the forward panel and the rear panel and the cavity is exposed in both forward and lateral directions.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: March 20, 2001
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yasuhito Suzuki, Akira Hiratsuka, Shinya Anzai