Patents Assigned to Toyooki Kogyo Co., Ltd.
  • Patent number: 10337509
    Abstract: Provided is an internal gear pump. The shape of any one of a plurality of external teeth and a plurality of internal teeth of the pump is formed on the basis of formulae (1)-(5). r=ro?dr·cos ?,??Formula (1): Px=(ro?dr)+1/4dr{1?cos(2?)},??Formula (2): Py=1/4dr{?2?+sin(2?)},??Formula (3): Qx=Px?r·cos ?,??Formula (4): Qy=Py+r·sin ???Formula (5):.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: July 2, 2019
    Assignee: TOYOOKI KOGYO CO., LTD.
    Inventor: Noritaka Watanabe
  • Patent number: 10066620
    Abstract: This internal gear pump accommodates: a ring-shaped internally toothed gear provided with internal teeth, and an externally toothed gear provided with external teeth which internally mesh with the internal teeth of the internally toothed gear, said externally toothed gear being eccentrically disposed inside the internally toothed gear. The number of internal teeth is one greater than the number of external teeth. In any one of the external teeth and the internal teeth, a tooth tip section and a meshing section are formed by a curve having one continuous curvature. The curve is formed by an equation with which the maximum curvature is at the apex of the tooth tip, and the curvature gradually reduces towards the tooth bottom section.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: September 4, 2018
    Assignee: TOYOOKI KOGYO CO., LTD.
    Inventor: Noritaka Watanabe
  • Patent number: 9046189
    Abstract: An electromagnetic valve includes: a valve main body including an inlet and an outlet of a fluid; a valve body to be seated on a valve seat provided between the inlet and the outlet; a movable iron core separating the valve body from the valve seat to communicate the inlet with the outlet; and a fixed iron core attracting the movable iron core by energization of a coil to axially drive the movable iron core. The valve main body includes an insertion hole into which a guide member is inserted and a stopper portion to stop the guide member biased by a pressure of the fluid. The guide member includes a sliding hole in which the movable iron core is axially movable, and is arranged in the insertion hole in a slidable manner with respect to the valve main body to be biased by the pressure of the fluid.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: June 2, 2015
    Assignees: TOYOOKI KOGYO CO., LTD, JTEKT CORPORATION
    Inventor: Noritaka Watanabe
  • Patent number: 8956133
    Abstract: An oil pump includes a first spill passage formed on a side surface (60) of a pump chamber (58) to communicate a hydraulic pressure chamber (54) with a first high pressure discharge passage (68) when the entire hydraulic pressure chamber (54) is positioned between the first high pressure discharge passage (68) and a first low pressure discharge passage (70). Therefore, when the hydraulic pressure chamber (54) passes between the first high pressure discharge passage (68) and the first low pressure discharge passage (70), the hydraulic pressure inside the predetermined hydraulic pressure chamber (54) escapes to the first high pressure discharge passage (68) through a first spill passage (76), so a hydraulic pressure value inside the hydraulic pressure chamber (54) is maintained at the pressure value inside the first high pressure discharge passage (68).
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: February 17, 2015
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd., JTEKT Corporation, Toyooki Kogyo Co., Ltd.
    Inventors: Yusuke Ogata, Yoshihiro Mizuno, Masashi Hattori, Masahiro Ito, Naoki Okoshi, Kenichi Mori, Masahiko Suzuki, Fumitake Suzuki, Hidenobu Yamaguchi, Haruhiko Shibata
  • Patent number: 8931754
    Abstract: A safety valve includes a cylinder having an open end and a plug for closing the open end with a hermetic seal. The interior of the cylinder communicates with a high-pressure gas passage. The cylinder is deformed as a function of gas pressure in the high-pressure gas passage to widen the open end. This allows gas in the high-pressure gas passage to escape and thus prevents the gas pressure from increasing beyond an acceptable level.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: January 13, 2015
    Assignees: Jtekt Corporation, Toyooki Kogyo Co., Ltd.
    Inventors: Yoshinori Imoto, Hiroaki Suzuki, Kazushi Numazaki, Chihiro Uchimura, Akira Yamashita, Tsukuo Ishitoya, Noritaka Watanabe
  • Patent number: 8920148
    Abstract: An oil pump having an inner rotor with of external teeth; an outer rotor that is eccentrically provided and has internal teeth that mesh with the inner rotor external teeth, and an oil pump body that accommodates the outer and inner rotors. By rotationally driving the inner rotor to increase and decrease a space between the internal and the external teeth, an intake stroke suctions hydraulic oil from the oil pump body and a discharge stroke discharges the suctioned hydraulic oil to a discharge port formed in the oil pump body. Between the intake and discharge strokes, a confinement stroke cuts off the suctioned hydraulic oil and confines the suctioned hydraulic oil in the space, and a compression stroke reduces the space and compresses the confined hydraulic oil. Further, an interval is set between a finish end portion of the intake port of the oil pump body and a start end portion of the discharge port such that a rotation angle of the inner rotor during the compression stroke is 21 to 27 degrees.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: December 30, 2014
    Assignees: Aisin AW Co., Ltd., Toyooki Kogyo Co., Ltd.
    Inventors: Masateru Nakagawa, Nobukazu Ike, Takuro Iwase, Tomohiro Umemura, Noriyasu Ariga, Katsunori Ishikawa, Masashi Narita
  • Patent number: 8851869
    Abstract: In an internal gear pump that includes an inner gear having outer teeth and an outer gear having inner teeth, either the inner or outer teeth have a shape based on a tooth shape that is respectively formed by a generating curve of the outer or inner teeth. The inner teeth are arc-shaped, the outer teeth are curved-shaped, and both end sections of the curved shape are arc-shaped. If a radius of the arc shape of the inner teeth is set as ro, a radius of the arc shape of each of the corner sections is set as ri, a diameter of a pitch circle of the inner teeth is set as dp, and the number of the inner teeth is set as z, the inner gear and the outer gear each has a shape that satisfies a relationship established by following equations: 1.6>ro/(dp/z)>1.0; and ro/(dp/z)>ri/(dp/z)?0.13.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: October 7, 2014
    Assignees: JTEKT Corporation, Toyooki Kogyo Co., Ltd.
    Inventors: Yoshihiro Oono, Motoyasu Yamamori, Daichi Kanda, Kenichi Takagi
  • Patent number: 8801559
    Abstract: A vehicular power transmitting system including an oil pump constructed to sufficiently reduce a required drive torque. A high-pressure-port discharge amount of first and second high-pressure passages of the oil pump is determined such that an amount of consumption of working oil of relatively high pressure can be afforded only by the high-pressure-port discharge amount, during steady-state running of a vehicle in which engine speed is not lower than a predetermined threshold value corresponding to a predetermined lowest target input shaft speed of a continuously variable transmission for its shifting control. The pressure of the working oil discharged from first and second low-pressure discharge passages is kept at a predetermined low level, and the required drive torque of the oil pump is sufficiently reduced.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: August 12, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyooki Kogyo Co., Ltd., JTEKT Corporation, Aisin AW Co., Ltd.
    Inventors: Yusuke Ogata, Yoshihiro Mizuno, Haruhiko Shibata, Hidenobu Yamaguchi, Fumitake Suzuki, Masahiko Suzuki, Masashi Hattori, Naoki Okoshi, Kenichi Mori, Masahiro Ito
  • Publication number: 20130170953
    Abstract: A vehicular power transmitting system including an oil pump constructed to sufficiently reduce a required drive torque. A high-pressure-port discharge amount of first and second high-pressure passages of the oil pump is determined such that an amount of consumption of working oil of relatively high pressure can be afforded only by the high-pressure-port discharge amount, during steady-state running of a vehicle in which engine speed is not lower than a predetermined threshold value corresponding to a predetermined lowest target input shaft speed of a continuously variable transmission for its shifting control. The pressure of the working oil discharged from first and second low-pressure discharge passages is kept at a predetermined low level, and the required drive torque of the oil pump is sufficiently reduced.
    Type: Application
    Filed: June 30, 2011
    Publication date: July 4, 2013
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., JTEKT Corporation, TOYOOKI KOGYO CO., LTD.
    Inventors: Yusuke Ogata, Yoshihiro Mizuno, Haruhiko Shibata, Hidenobu Yamaguchi, Fumitake Suzuki, Masahiko Suzuki, Masashi Hattori, Naoki Okoshi, Kenichi Mori, Masahiro Ito
  • Publication number: 20130089453
    Abstract: An oil pump includes a first spill passage formed on a side surface (60) of a pump chamber (58) to communicate a hydraulic pressure chamber (54) with a first high pressure discharge passage (68) when the entire hydraulic pressure chamber (54) is positioned between the first high pressure discharge passage (68) and a first low pressure discharge passage (70). Therefore, when the hydraulic pressure chamber (54) passes between the first high pressure discharge passage (68) and the first low pressure discharge passage (70), the hydraulic pressure inside the predetermined hydraulic pressure chamber (54) escapes to the first high pressure discharge passage (68) through a first spill passage (76), so a hydraulic pressure value inside the hydraulic pressure chamber (54) is maintained at the pressure value inside the first high pressure discharge passage (68).
    Type: Application
    Filed: June 17, 2011
    Publication date: April 11, 2013
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYOOKI KOGYO CO., LTD., JTEKT CORPORATION, AISIN AW CO., LTD.
    Inventors: Yusuke Ogata, Yoshihiro Mizuno, Masashi Hattori, Masahiro Ito, Naoki Okoshi, Kenichi Mori, Masahiko Suzuki, Fumitake Suzuki, Hidenobu Yamaguchi, Haruhiko Shibata
  • Patent number: 8382063
    Abstract: An electromagnetic valve includes a valve body, a valve element, a movable iron core, a guide tube, a coil, a yoke, and a fixed iron core. The valve body includes a fluid flow path. The valve element is movable and seated on a valve seat provided in the fluid flow path of the valve body. The movable iron core moves the valve element with respect to the valve seat. The guide tube is cylindrical and movably supports the movable iron core. The coil is mounted on an outer periphery of the guide tube. The yoke covers an outside of the coil and forms a magnetic circuit. The fixed iron core is provided facing the movable iron core and attracts the movable iron core by energization of the coil. The valve body is coupled to the guide tube on one opening end side of the guide tube, and the fixed iron core is provided on an other end side of the guide tube with a clearance spaced from an inside of the guide tube.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: February 26, 2013
    Assignee: Toyooki Kogyo Co., Ltd
    Inventor: Noritaka Watanabe
  • Publication number: 20120199775
    Abstract: An electromagnetic valve includes: a valve main body including an inlet and an outlet of a fluid; a valve body to be seated on a valve seat provided between the inlet and the outlet; a movable iron core separating the valve body from the valve seat to communicate the inlet with the outlet; and a fixed iron core attracting the movable iron core by energization of a coil to axially drive the movable iron core. The valve main body includes an insertion hole into which a guide member is inserted and a stopper portion to stop the guide member biased by a pressure of the fluid. The guide member includes a sliding hole in which the movable iron core is axially movable, and is arranged in the insertion hole in a slidable manner with respect to the valve main body to be biased by the pressure of the fluid.
    Type: Application
    Filed: October 21, 2010
    Publication date: August 9, 2012
    Applicants: JTEKT CORPORATION, TOYOOKI KOGYO CO., LTD.
    Inventor: Noritaka Watanabe
  • Publication number: 20120080625
    Abstract: A safety valve includes a cylinder having an open end and a plug for closing the open end with a hermetic seal. The interior of the cylinder communicates with a high-pressure gas passage. The cylinder is deformed as a function of gas pressure in the high-pressure gas passage to widen the open end. This allows gas in the high-pressure gas passage to escape and thus prevents the gas pressure from increasing beyond an acceptable level.
    Type: Application
    Filed: October 3, 2011
    Publication date: April 5, 2012
    Applicants: TOYOOKI KOGYO CO., LTD., JTEKT CORPORATION
    Inventors: Yoshinori Imoto, Hiroaki Suzuki, Kazushi Numazaki, Chihiro Uchimura, Akira Yamashita, Tsukuo Ishitoya, Noritaka Watanabe
  • Patent number: 8104508
    Abstract: A plug body housing 16 has a receiving recess 17, and the receiving recess 17 includes a first recess 21 opening toward the outside and a second recess 22 connected to the first recess 21. Check valves 8 and 9 are provided in the second recess 22, and a manual valve 14 is provided in the first recess 21. An internal threaded portion 45 is formed in an inner circumferential surface of the first recess 21, and a housing 35 of the manual valve 14 is threaded into the internal threaded portion 45. The check valves 8 and 9 are held between a bottom surface 22a of the second recess 22 and a bottom 35a of the housing 35 so that the check valves 8 and 9 are secured in the second recess 22.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: January 31, 2012
    Assignees: JTEKT Corporation, Toyooki Kogyo Co., Ltd.
    Inventors: Takuya Suzuki, Hidetoshi Fujiwara, Toshihiko Shima, Munetoshi Kuroyanagi, Tadayoshi Kamiya, Soichi Shirai, Nobuyuki Shirai
  • Publication number: 20110194968
    Abstract: An oil pump having an inner rotor with of external teeth; an outer rotor that is eccentrically provided and has internal teeth that mesh with the inner rotor external teeth, and an oil pump body that accommodates the outer and inner rotors. By rotationally driving the inner rotor to increase and decrease a space between the internal and the external teeth, an intake stroke suctions hydraulic oil from the oil pump body and a discharge stroke discharges the suctioned hydraulic oil to a discharge port formed in the oil pump body. Between the intake and discharge strokes, a confinement stroke cuts off the suctioned hydraulic oil and confines the suctioned hydraulic oil in the space, and a compression stroke reduces the space and compresses the confined hydraulic oil. Further, an interval is set between a finish end portion of the intake port of the oil pump body and a start end portion of the discharge port such that a rotation angle of the inner rotor during the compression stroke is 21 to 27 degrees.
    Type: Application
    Filed: January 26, 2011
    Publication date: August 11, 2011
    Applicants: AISIN AW CO., LTD., TOYOOKI KOGYO CO., LTD.
    Inventors: Masateru NAKAGAWA, Nobukazu IKE, Takuro IWASE, Tomohiro UMEMURA, Noriyasu ARIGA, Katsunori ISHIKAWA, Masashi NARITA
  • Publication number: 20100276012
    Abstract: An electromagnetic pilot opening/closing valve includes: a valve main body member that includes a sliding hole; a main valve body that is slidably provided in the sliding hole; a movable iron core; and a fixed iron core. The main valve body includes a second sliding hole. A pilot valve body is provided in the second sliding hole. The movable iron core and the pilot valve body are designed to slidably engage with each other, and the movable iron core and the main valve body are designed to slidably engage with each other with a play therebetween. When the movable iron core is attracted by the fixed iron core by energization of the coil, the movable iron core causes the pilot valve body to slide inside the second sliding hole and sliding of the pilot valve body causes the main valve body to slide inside the sliding hole.
    Type: Application
    Filed: December 19, 2008
    Publication date: November 4, 2010
    Applicants: TOYOOKI KOGYO CO., LTD., JTEKT CORPORATION
    Inventors: Noritaka Watanabe, Hiroaki Suzuki
  • Publication number: 20100258753
    Abstract: An electromagnetic valve includes a valve body, a valve element, a movable iron core, a guide tube, a coil, a yoke, and a fixed iron core. The valve body includes a fluid flow path. The valve element is movable and seated on a valve seat provided in the fluid flow path of the valve body. The movable iron core moves the valve element with respect to the valve seat. The guide tube is cylindrical and movably supports the movable iron core. The coil is mounted on an outer periphery of the guide tube. The yoke covers an outside of the coil and forms a magnetic circuit. The fixed iron core is provided facing the movable iron core and attracts the movable iron core by energization of the coil. The valve body is coupled to the guide tube on one opening end side of the guide tube, and the fixed iron core is provided on an other end side of the guide tube with a clearance spaced from an inside of the guide tube.
    Type: Application
    Filed: December 10, 2008
    Publication date: October 14, 2010
    Applicants: TOYOOKI KOGYO CO., LTD., JTEKT CORPORATION
    Inventor: Noritaka Watanabe
  • Patent number: 7730905
    Abstract: A high pressure valve for hydrogen gas includes a valve seat and a valve member, which is movable to selectively open and close the valve seat. One of the valve member and the valve seat is formed of austenitic stainless steel, and the other one of the valve member and the valve seat is formed of flexible synthetic resin or soft metal.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: June 8, 2010
    Assignees: Toyooki Kogyo Co., Ltd., Jtekt Corporation
    Inventors: Hiroaki Suzuki, Yoshiyuki Takeuchi, Toshihiko Shima, Soichi Shirai
  • Patent number: 7547001
    Abstract: In order to obtain a solenoid valve device installed in a gas tank that is small in size and easy to attach to a gas tank, a valve body (8) including a flow passage (a) formed therein to communicate the inside and the outside of a gas tank (1) is inserted to the inside from the outside through a mouth hole (2) of the gas tank (1) and attached to the mouth hole (2). A valve seat (46) is provided in the flow passage (a), and a movable valve element (40) attached to or detached from the valve seat (46) is provided in the valve body (8). A solenoid unit (48) includes a movable core (50) engaged with the valve element (40) and a fixed core (64) facing the movable core (50) to attract the movable core (50) by the energization of a coil (74) and distract the movable core (50) by the non-energization of the coil (74). The solenoid unit (48) is arranged inside a storage hole (16) formed at an end part of the valve body (8) inside the gas tank (1).
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: June 16, 2009
    Assignees: Toyooki Kogyo Co. Ltd., Jtekt Corporation
    Inventors: Tadayoshi Kamiya, Soichi Shirai, Mikio Asai, Nobuyuki Shirai, Yoshiyuki Takeuchi, Toshihiko Shima, Hiroaki Suzuki
  • Publication number: 20080121288
    Abstract: A high pressure valve for hydrogen gas includes a valve seat and a valve member, which is movable to selectively open and close the valve seat. One of the valve member and the valve seat is formed of austenitic stainless steel, and the other one of the valve member and the valve seat is formed of flexible synthetic resin or soft metal.
    Type: Application
    Filed: January 23, 2008
    Publication date: May 29, 2008
    Applicants: TOYODA KOKI KABUSHIKI KAISHA, TOYOOKI KOGYO CO., LTD.
    Inventors: Hiroaki Suzuki, Yoshiyuki Takeuchi, Toshihiko Shima, Soichi Shirai