Patents by Inventor Masaki Nanahara

Masaki Nanahara 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: 9133954
    Abstract: An electromagnetic linear valve includes a housing including a core closing an opening at one end portion of the body portion, and a separation portion separating an interior into a first liquid chamber located in a core side and a second liquid chamber; a plunger disposed in the first liquid chamber so as to move along the axis in a state in which one end thereof faces to the core and the other end can sit on a hole; an elastic member applying a force to move the plunger away from the core; and a coil generating magnetic field to move the plunger toward the core. A recess is formed in a section of an inner circumferential portion of the body portion which intersects with an end face of the core in the first direction.
    Type: Grant
    Filed: September 6, 2010
    Date of Patent: September 15, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kei Sato, Masaki Nanahara, Masayasu Ohkubo
  • Publication number: 20150192217
    Abstract: An electromagnetic valve includes a housing, a valve element, a movable core, a spring, a coil, and a stationary core. The housing includes a cylinder portion that houses the movable core so that the movable core is movable in an axial direction. An axial intermediate portion of the cylinder portion is formed as a non-magnetic portion that surrounds an outer circumference of an axial intermediate portion of the movable core. Both axial sides of the non-magnetic portion are formed as a one-side magnetic portion and an another-side magnetic portion that surround an outer circumference of the movable core.
    Type: Application
    Filed: July 2, 2012
    Publication date: July 9, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masakuni Suzuki, Masaki Nanahara, Kei Sato, Katsuhiro Kanamori, Takeshi Ishida
  • Publication number: 20150137014
    Abstract: An electromagnetic valve includes a housing, a plunger, a spring, and a solenoid. The housing includes a cylindrical guide member configured to assist axial movement of the plunger, a seat member assembled to the guide member with a valve hole formed therein, a stationary core arranged so as to be opposed to an end portion of the guide member at a predetermined distance away therefrom in an axial direction, and a sleeve coupled, in a liquid-tight manner, to each of an outer circumference of an end portion of the stationary core and an outer circumference of the end portion of the guide member so as to integrally couple the stationary core and the guide member to each other.
    Type: Application
    Filed: August 10, 2012
    Publication date: May 21, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kei Sato, Akihiro Yamada, Masaki Nanahara
  • Publication number: 20150041694
    Abstract: A normally closed solenoid valve (100) includes a housing (10), and a valve element (21), a movable core (22), a first spring (23), a second spring (24), a coil (25), a stator core (26), and other components, which are assembled to the housing (10). The valve element (21) is arranged so as to be seatable on and unseatable from a valve seat (12c). The movable core (22) is assembled to a cylinder section (11b) of the housing (10) so as to be movable integrally with the valve element (21) in an axial direction of the movable core (22). The first spring (23) is configured to bias the valve element (21) and the movable core (22) toward the valve seat (12c). The coil (25) and the stator core (26) are configured to generate an electromagnetic force resistive to a load of the first spring (23) for the movable core (22) through energization of the coil (25).
    Type: Application
    Filed: June 12, 2012
    Publication date: February 12, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Nanahara, Yoshito Tanaka, Kei Sato
  • Patent number: 8939430
    Abstract: An electromagnetic linear valve includes: (a) a plunger including a large outside-diameter portion and a small outside-diameter portion, and (b) a housing having a through-hole and including a large inside-diameter portion in which the large outside-diameter portion is inserted with a clearance being defined between the large inside-diameter portion and the large outside-diameter portion, and a small inside-diameter portion in which the small outside-diameter portion is inserted with a clearance being defined between the small inside-diameter portion and the outside-diameter portion. The plunger has an end portion which serves as a valve body that is to be seated on a valve seat constituted by an opening of the through-hole. The large outside-diameter portion has an end portion constituted by another end portion of the plunger that is opposite to the above-described end portion of the plunger.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: January 27, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masaki Nanahara, Kei Sato
  • Publication number: 20140291564
    Abstract: In an electromagnetic linear valve, a resilient member urges a plunger in a direction in which the core-opposing portions move away from a core portion, and moves the plunger in a direction in which the core-opposing portions approach the core portion where an electric current is supplied to a coil. Where no electric current is supplied to the coil, an axially opposing surface area as a surface area of portions of the core-opposing portions which respectively oppose inner peripheral surfaces of recessed portions is smaller than a radially opposing surface area as a surface area of portions of the core-opposing portions which respectively oppose bottom surfaces of the recessed portions, and the axially opposing surface area becomes larger than the radially opposing surface area where an electric current is supplied to the coil and the core-opposing portions approach most to the core portion.
    Type: Application
    Filed: November 4, 2011
    Publication date: October 2, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kei Sato, Masaki Nanahara, Katsuhiro Kanamori, Masakuni Suzuki, Takeshi Ishida
  • Publication number: 20130153801
    Abstract: An electromagnetic linear valve includes a housing including a core closing an opening at one end portion of the body portion, and a separation portion separating an interior into a first liquid chamber located in a core side and a second liquid chamber; a plunger disposed in the first liquid chamber so as to move along the axis in a state in which one end thereof faces to the core and the other end can sit on a hole; an elastic member applying a force to move the plunger away from the core; and a coil generating magnetic field to move the plunger toward the core. A recess is formed in a section of an inner circumferential portion of the body portion which intersects with an end face of the core in the first direction.
    Type: Application
    Filed: September 6, 2010
    Publication date: June 20, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kei Sato, Masaki Nanahara, Masayasu Ohkubo
  • Patent number: 8224545
    Abstract: A brake control apparatus (20) includes: a hydraulic pressure source (30) that regulates pressure of hydraulic fluid in accordance with a brake operation input (24,25); a wheel cylinder (23) that applies braking force to a wheel (22) in response to a supply of the hydraulic fluid to the wheel cylinder (23); a hydraulic pressure booster mechanism (31) that amplifies the brake operation input by using the hydraulic pressure source (30), and outputs the amplified brake operation input; a hydraulic fluid supply path (63) through which the hydraulic fluid is supplied from the hydraulic pressure source (30) to the wheel cylinder (23); and a controller (70) that shuts off (valve 66) a flow of the hydraulic fluid-through the hydraulic fluid supply path (63), if a malfunction due to hydraulic fluid leakage is detected in the hydraulic fluid supply path (63) during a brake control mode in which the hydraulic fluid is supplied to the wheel cylinder (23) through the hydraulic fluid supply path (63).
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: July 17, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshito Tanaka, Hiroshi Nakaoka, Masaki Nanahara
  • Publication number: 20120001109
    Abstract: An electromagnetic linear valve includes: (a) a plunger including a large outside-diameter portion and a small outside-diameter portion, and (b) a housing having a through-hole and including a large inside-diameter portion in which the large outside-diameter portion is inserted with a clearance being defined between the large inside-diameter portion and the large outside-diameter portion, and a small inside-diameter portion in which the small outside-diameter portion is inserted with a clearance being defined between the small inside-diameter portion and the outside-diameter portion. The plunger has an end portion which serves as a valve body that is to be seated on a valve seat constituted by an opening of the through-hole. The large outside-diameter portion has an end portion constituted by another end portion of the plunger that is opposite to the above-described end portion of the plunger.
    Type: Application
    Filed: December 21, 2009
    Publication date: January 5, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Nanahara, Kei Sato
  • Patent number: 8039108
    Abstract: A member (1) resistant to erosion by cavitation on which an amorphous carbon film coating is formed on a surface of a base material has at least a first amorphous carbon film coating (4) having a plurality of columnar structures (4a) on the surface of the base material (2), and a second amorphous carbon film coating (5) having a plurality of granular structures (5a) deposited with no orientation on the surface of the first amorphous carbon film coating (4).
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: October 18, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takayasu Sato, Takaaki Kanazawa, Masaki Nanahara
  • Publication number: 20100213758
    Abstract: In a normally closed electromagnetic valve (100A, 100B, 100C, 100D), a rod (112,212) is supported so as to be able to move in a first direction toward a valve seat (114b) as well as in a second direction away from the valve seat (114b). This rod (112,212) closes off the hydraulic fluid path when seated on the valve seat (114b), and opens up the hydraulic fluid path when away from the valve seat (114b). When current is not being supplied to a coil (130), a first armature (116,216) pushes the rod (112,212) in the first direction using urging force of a first spring (122). When current is being supplied to the coil (130), the first armature (116,216) moves in the second direction, and the second armature (118) pushes the rod (112,212) in the first direction using electromagnetic force corresponding to the amount of the current.
    Type: Application
    Filed: September 3, 2008
    Publication date: August 26, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masaki Nanahara
  • Publication number: 20100114419
    Abstract: A brake control apparatus (20) includes: a hydraulic pressure source (30) that regulates pressure of hydraulic fluid in accordance with a brake operation input (24,25); a wheel cylinder (23) that applies braking force to a wheel (22) in response to a supply of the hydraulic fluid to the wheel cylinder 823); a hydraulic pressure booster mechanism (31) that amplifies the brake operation input by using the hydraulic pressure source (30), and outputs the amplified brake operation input; a hydraulic fluid supply path (63) through which the hydraulic fluid is supplied from the hydraulic pressure source (30) to the wheel cylinder (23); and a controller (70) that shuts off (valve 66) a flow of the hydraulic fluid-through the hydraulic fluid supply path (63), if a malfunction due to hydraulic fluid leakage is detected in the hydraulic fluid supply path (63) during a brake control mode in which the hydraulic fluid is supplied to the wheel cylinder (23) through the hydraulic fluid supply path (63).
    Type: Application
    Filed: February 5, 2008
    Publication date: May 6, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshito Tanaka, Hiroshi Nakaoka, Masaki Nanahara
  • Publication number: 20090098361
    Abstract: A member (1) resistant to erosion by cavitation on which an amorphous carbon film coating is formed on a surface of a base material has at least a first amorphous carbon film coating (4) having a plurality of columnar structures (4a) on the surface of the base material (2), and a second amorphous carbon film coating (5) having a plurality of granular structures (5a) deposited with no orientation on the surface of the first amorphous carbon film coating (4).
    Type: Application
    Filed: January 26, 2007
    Publication date: April 16, 2009
    Inventors: Takayasu Sato, Takaaki Kanazawa, Masaki Nanahara
  • Publication number: 20090029068
    Abstract: A carbon thin film manufacturing method includes depositing an intermediate layer on a surface of a substrate, and forming a diamond-like carbon coating on a surface of the intermediate layer. In the carbon thin film manufacturing method, a bias voltage within a range of 0 V to ?30 V is applied to the substrate during the deposition of the intermediate layer.
    Type: Application
    Filed: July 25, 2008
    Publication date: January 29, 2009
    Inventors: Takaaki KANAZAWA, Kenji Shimoda, Masaki Nanahara, Hodo Suzuki, Naoyuki Omori
  • Publication number: 20060186728
    Abstract: A suspension apparatus includes a fluid cylinder for a wheel of a vehicle; at least one of a first controller and a second controller; and a third controller. The fluid cylinder for the wheel of the vehicle is provided between a wheel-holding device that holds the wheel and the vehicle body. The first controller includes (a) an accumulator connected to the fluid cylinder; and (b) an electromagnetic control valve provided between the accumulator and the fluid cylinder. The second controller includes (a) a fluid source that includes a high-pressure source and a low-pressure source; and (b) an electromagnetic control valve, provided between the fluid source and the fluid cylinder, which controls the flow of fluid between the fluid cylinder and the fluid source. The third controller suppresses the pulsation of the fluid caused by operating the electromagnetic control valve included in at least one of the first controller and the second controller.
    Type: Application
    Filed: January 24, 2006
    Publication date: August 24, 2006
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Mizuta, Hideki Ohashi, Kazuo Ogawa, Osamu Yasuike, Yukihide Kimura, Kazuyuki Mizuno, Masaki Nanahara, Tsuyoshi Yamasaki, Kotaro Okimura