Patents by Inventor Yohei Takano

Yohei Takano 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: 10767905
    Abstract: An ejector includes a body including an inflow space into which a refrigerant flows, a passage formation member disposed inside the body and having a conical shape, and a nozzle passage having an annular cross section functioning as a nozzle and a diffuser passage having an annular cross section functioning as a pressurizing portion between an inner wall surface of the body and a conical lateral surface of the passage formation member. A drive mechanism that displaces the passage formation member along a center axis is coupled to an upstream actuating bar which extends from the passage formation member toward the inflow space and is slidably supported by the body. A largest outer diameter portion of an annular member forming a wall surface of the nozzle passage provides a throat portion functioning as an edge for enlarging a passage cross-sectional area to cause a separation vortex in the refrigerant.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: September 8, 2020
    Assignee: DENSO CORPORATION
    Inventors: Haruyuki Nishijima, Yoshiaki Takano, Yoshiyuki Yokoyama, Hiroshi Oshitani, Yohei Nagano, Ryota Nakashima
  • Patent number: 10725369
    Abstract: A light source device includes: a light source to emit first color light; a fluorescent member having a first region that includes a fluorescent body to convert at least a part of the first color light into second color light different from the first color light when irradiated with the first color light and a second region to transmit the first color light; a wave plate; a reflecting member to reflect the first color light transmitted through the wave plate; and an optical path separating element provided on an optical path between the light source and the fluorescent member and transmit one of the first color light emitted from the light source and reflected light of the first color light by the reflecting member, and reflect another one.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: July 28, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Kasumi Nakamura, Yohei Takano, Hirotoshi Nakayama, Naoki Nakamura
  • Publication number: 20200230886
    Abstract: A fabricating apparatus for fabricating a three-dimensional object includes a fabricating device and processing circuitry. The fabricating device is configured to fabricate a fabrication layer based on fabrication data of the three-dimensional object. The processing circuitry is configured to measure a shape of the fabrication layer and correct an operation of fabricating another fabrication layer above the fabrication layer, based on a height of the fabrication layer measured.
    Type: Application
    Filed: December 30, 2019
    Publication date: July 23, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Yohei TAKANO, Yasuaki YOROZU, Shingo NAGATSUKA
  • Publication number: 20200201008
    Abstract: An optical system includes a reflective optical system on a magnification side along an optical path of the projection optical system and a refractive optical system on a reduction side along the optical path. The reflective optical system includes one reflective optical element having a power. The refractive optical system includes a front group on the magnification side and a rear group on the reduction side. The front group having, in order from the magnification side toward the reduction side, a first lens group with a positive or negative refractive power, a second lens group, and a third lens group with a positive refractive power. The rear group has a positive refractive power. The first lens group moves to the magnification side, and the second lens group and the third lens group move to the reduction side in a change in focus from a long distance to a short distance.
    Type: Application
    Filed: March 4, 2020
    Publication date: June 25, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Yohei TAKANO, Hibiki TATSUNO, Yasuyuki SHIBAYAMA
  • Patent number: 10622854
    Abstract: A rotor includes: a rotary member; a plurality of permanent magnets that are arranged on the outer circumferential side of the rotary member; and a cover tube that is provided on the side of an outer circumferential surface of the plurality of the permanent magnets and that is formed with a fiber bundle in which a plurality of fiber reinforced plastic filaments are arranged along a longitudinal direction, and the fiber bundle of the cover tube is spirally stacked in layers along a circumferential direction of the rotary member such that a part of the fiber bundle in a width direction is slackened.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: April 14, 2020
    Assignee: FANUC CORPORATION
    Inventors: Shinobu Takano, Takafumi Kajiya, Yohei Arimatsu
  • Patent number: 10585269
    Abstract: An optical system includes a reflective optical system on a magnification side along an optical path of the projection optical system and a refractive optical system on a reduction side along the optical path. The reflective optical system includes one reflective optical element having a power. The refractive optical system includes a front group on the magnification side and a rear group on the reduction side. The front group having, in order from the magnification side toward the reduction side, a first lens group with a positive or negative refractive power, a second lens group, and a third lens group with a positive refractive power. The rear group has a positive refractive power. The first lens group moves to the magnification side, and the second lens group and the third lens group move to the reduction side in a change in focus from a long distance to a short distance.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: March 10, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohei Takano, Hibiki Tatsuno, Yasuyuki Shibayama
  • Publication number: 20200064719
    Abstract: A light source device includes: a light source to emit first color light; a fluorescent member having a first region that includes a fluorescent body to convert at least a part of the first color light into second color light different from the first color light when irradiated with the first color light and a second region to transmit the first color light; a wave plate; a reflecting member to reflect the first color light transmitted through the wave plate; and an optical path separating element provided on an optical path between the light source and the fluorescent member and transmit one of the first color light emitted from the light source and reflected light of the first color light by the reflecting member, and reflect another one.
    Type: Application
    Filed: August 7, 2019
    Publication date: February 27, 2020
    Inventors: Kasumi Nakamura, Yohei Takano, Hirotoshi Nakayama, Naoki Nakamura
  • Publication number: 20200003963
    Abstract: A fiber optic connector with a rotatable housing integrated with a connection member for converting the connector from a first polarity to a second polarity, and a manipulator assembly comprising the rotatable housing and a locking member movable between a locked position and an unlocked position, the manipulator assembly being coupled to the connection member such that the manipulator assembly and the connection member rotate conjointly about the axis of rotation, and when in locked position connector polarity cannot be changed.
    Type: Application
    Filed: June 28, 2019
    Publication date: January 2, 2020
    Inventors: Kenji IIZUMI, Kazuyoshi TAKANO, Yohei AOSHIMA, Daizo NISHIOKA, Man Ming HO
  • Publication number: 20190285979
    Abstract: A projection optical system satisfies ?1?15 (deg) and 3<EP/Ym<7. ?1 is a maximum inclination angle of the reflective surface of each of the micromirrors with respect to the line normal to the image display surface; EP is an entrance pupil distance of the projection optical system; and Ym is a maximum distance in a plane from an optical axis to a point on the image display surface, the plane being a plane in which a light ray propagating from a center of the image display surface toward the projection surface through a center of an aperture stop of the projection optical system exists, the optical axis being an axis shared by a largest number of the plurality of lenses of the projection optical system, the point corresponding to an image on the projection surface.
    Type: Application
    Filed: March 17, 2019
    Publication date: September 19, 2019
    Inventors: Yohei TAKANO, Hirotoshi Nakayama
  • Publication number: 20190219801
    Abstract: There is provided a projection optical system capable of projecting an image formed on an image forming unit on a projection plane, which has an extremely short projection distance and a small size.
    Type: Application
    Filed: March 21, 2019
    Publication date: July 18, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Yohei TAKANO, Hibiki TATSUNO, Nobuyuki ARAI, Hirotoshi NAKAYAMA
  • Publication number: 20190170988
    Abstract: An optical system includes a reflective optical system on a magnification side along an optical path of the projection optical system and a refractive optical system on a reduction side along the optical path. The reflective optical system includes one reflective optical element having a power. The refractive optical system includes a front group on the magnification side and a rear group on the reduction side. The front group having, in order from the magnification side toward the reduction side, a first lens group with a positive or negative refractive power, a second lens group, and a third lens group with a positive refractive power. The rear group has a positive refractive power. The first lens group moves to the magnification side, and the second lens group and the third lens group move to the reduction side in a change in focus from a long distance to a short distance.
    Type: Application
    Filed: February 7, 2019
    Publication date: June 6, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Yohei TAKANO, Hibiki Tatsuno, Yasuyuki Shibayama
  • Patent number: 10241308
    Abstract: There is provided a projection optical system capable of projecting an image formed on an image forming unit on a projection plane, which has an extremely short projection distance and a small size.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: March 26, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohei Takano, Hibiki Tatsuno, Nobuyuki Arai, Hirotoshi Nakayama
  • Patent number: 10228546
    Abstract: An optical system includes a reflective optical system on a magnification side along an optical path of the projection optical system and a refractive optical system on a reduction side along the optical path. The reflective optical system includes one reflective optical element having a power. The refractive optical system includes a front group on the magnification side and a rear group on the reduction side. The front group having, in order from the magnification side toward the reduction side, a first lens group with a positive or negative refractive power, a second lens group, and a third lens group with a positive refractive power. The rear group has a positive refractive power. The first lens group moves to the magnification side, and the second lens group and the third lens group move to the reduction side in a change in focus from a long distance to a short distance.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: March 12, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohei Takano, Hibiki Tatsuno, Yasuyuki Shibayama
  • Patent number: 10067324
    Abstract: A projection device to magnify and project, on a screen, an image displayed at an image display element, includes: a dioptric system including at least one positive lens and at least one negative lens; and a reflection optical system having at least one reflection optical element.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: September 4, 2018
    Assignee: Ricoh Company, Ltd.
    Inventor: Yohei Takano
  • Publication number: 20180074302
    Abstract: An optical system includes a reflective optical system on a magnification side along an optical path of the projection optical system and a refractive optical system on a reduction side along the optical path. The reflective optical system includes one reflective optical element having a power. The refractive optical system includes a front group on the magnification side and a rear group on the reduction side. The front group having, in order from the magnification side toward the reduction side, a first lens group with a positive or negative refractive power, a second lens group, and a third lens group with a positive refractive power. The rear group has a positive refractive power. The first lens group moves to the magnification side, and the second lens group and the third lens group move to the reduction side in a change in focus from a long distance to a short distance.
    Type: Application
    Filed: November 24, 2017
    Publication date: March 15, 2018
    Inventors: Yohei TAKANO, Hibiki TATSUNO, Yasuyuki SHIBAYAMA
  • Patent number: 9864260
    Abstract: An image display apparatus and an image display unit. The image display apparatus and the image display unit includes a light source configured to emit light, an illumination optical system including a luminous body forming device configured to form a secondary luminous body, the illumination optical system guiding the light emitted from the light source, an optical modulation element including a plurality of reflection planes to modulate the light guided by the illumination optical system, and a projection optical system including a projection lens system and a barrel storing the projection lens system, the projection optical system projecting the light modulated by the optical modulation element onto a projection plane. The barrel satisfies an equation ?<0.71H+8.5, where ? denotes an outside diameter of a front end of the barrel on a light entering side and H denotes distance between the reflection planes and the front end of the barrel.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: January 9, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuyuki Shibayama, Hibiki Tatsuno, Yohei Takano
  • Patent number: 9864177
    Abstract: An optical system includes a reflective optical system on a magnification side along an optical path of the projection optical system and a refractive optical system on a reduction side along the optical path. The reflective optical system includes one reflective optical element having a power. The refractive optical system includes a front group on the magnification side and a rear group on the reduction side. The front group having, in order from the magnification side toward the reduction side, a first lens group with a positive or negative refractive power, a second lens group, and a third lens group with a positive refractive power. The rear group has a positive refractive power. The first lens group moves to the magnification side, and the second lens group and the third lens group move to the reduction side in a change in focus from a long distance to a short distance.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: January 9, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohei Takano, Hibiki Tatsuno, Yasuyuki Shibayama
  • Publication number: 20180003934
    Abstract: There is provided a projection optical system capable of projecting an image formed on an image forming unit on a projection plane, which has an extremely short projection distance and a small size.
    Type: Application
    Filed: September 18, 2017
    Publication date: January 4, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Yohei TAKANO, Hibiki TATSUNO, Nobuyuki ARAI, Hirotoshi NAKAYAMA
  • Publication number: 20170293125
    Abstract: A projection device to magnify and project, on a screen, an image displayed at an image display element, includes: a dioptric system including at least one positive lens and at least one negative lens; and a reflection optical system having at least one reflection optical element.
    Type: Application
    Filed: June 26, 2017
    Publication date: October 12, 2017
    Inventor: Yohei TAKANO
  • Patent number: 9766438
    Abstract: There is provided a projection optical system capable of projecting an image formed on an image forming unit on a projection plane, which has an extremely short projection distance and a small size.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: September 19, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohei Takano, Hibiki Tatsuno, Nobuyuki Arai, Hirotoshi Nakayama