Patents Assigned to DOLPHIN CO., LTD.
  • Patent number: 11275157
    Abstract: An object detecting apparatus is provided with: a collimating assembly that converts laser light emitted by plural light-emitting points to a laser beam having a divergence angle in an arrangement direction of plural light-emitting points; and an optical assembly that projects the laser beam outward along an optical axis and guides an incident light toward a light-receiving element along the optical axis. The optical assembly is provided with a collective optics that forms an image of the incident light on a focal plane and an aperture located on the focal plane. The aperture satisfies ???, where ? is the divergence angle along the arrangement direction of plural light-emitting points, D is a size of a light passing region of the aperture in a direction corresponding to the divergence angle, d is an effective focal distance of the collective optics, and ?=arctan(D/d).
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: March 15, 2022
    Assignee: DOLPHIN CO., LTD.
    Inventor: Zhihui Duan
  • Patent number: 10878984
    Abstract: An actuator includes a column shaped magnet having an S-pole and an N-pole thereof positioned opposite to each other across a central axis of the magnet. A driving coil is disposed near the magnet, the driving coil comprising a first portion and a second portion positioned opposite to each other across the magnet, the first portion and the second portion are generally parallel to the central axis, current flowing in opposite directions in the first portion and the second portion when powered on. A ferromagnetic material is disposed outside the driving coil along the central axis, distance from the central axis to the ferromagnetic material varying with the direction from the central axis. A driving circuitry is configured to apply a drive signal, the drive signal having a periodically varying voltage or current. The magnet performs reciprocating rotation in accordance with the drive signal applied by the driving circuitry.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: December 29, 2020
    Assignee: DOLPHIN CO., LTD.
    Inventor: Zhihui Duan
  • Patent number: 10852431
    Abstract: An actuator comprises: a torsion spring fixed to a top yoke as a support member; a permanent magnet coupled to the torsion spring where the permanent magnet is placed with an N-pole and an S-pole thereof across a rotational axis of the torsion spring; a drive circuitry configured to apply a drive signal with periodically varying voltage or current; and a mirror unit comprising a first mirror and second mirrors, the first mirror being near a center of the torsion spring, and the second mirrors being around the first mirror and parallel to the first mirror. A plane including a reflecting surface of the second mirrors is closer to the rotation axis of the torsion spring than a plane including a reflecting surface of the first mirror, and the mirror unit reciprocates in accordance with application of the drive signal.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: December 1, 2020
    Assignee: DOLPHIN CO., LTD.
    Inventor: Zhihui Duan
  • Patent number: 10620314
    Abstract: An object detecting apparatus is provided with: a laser diode that projects a laser beam; a torsion spring coupled with a support member; a mirror coupled to a first side of the torsion spring and reflecting the laser beam; a permanent magnet coupled to a second side of the torsion spring across a rotational axis of the torsion spring; a driving coil; and a magnetic substance assembly surrounding the driving coil. The mirror reciprocates corresponding to a driving signal applied to the driving coil. The object detecting apparatus is further provided with a speed detecting circuitry configured to detect a moving speed of the mirror; and a pulse controller configured to control a pulse interval of the laser beam projected by the laser diode based on the moving speed detected by the speed detecting circuitry.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: April 14, 2020
    Assignee: DOLPHIN CO., LTD.
    Inventor: Zhihui Duan
  • Patent number: 10324184
    Abstract: An object detecting apparatus is provided with: a lens assembly that converts laser light emitted by plural light-emitting points to a laser beam having a divergence angle in an arrangement direction of plural light-emitting points; and an optical assembly that projects the laser beam outward along an optical axis and guides an incident light toward a light-receiving element along the optical axis. The optical assembly is provided with a collective lens that forms an image of the incident light on a focal plane and an aperture located on the focal plane. The aperture satisfies ???, where ? is the divergence angle along the arrangement direction of plural light-emitting points, D is a size of a light passing region of the aperture in a direction corresponding to the divergence angle, d is a distance between the collective lens and the aperture, and ?=arctan(D/d).
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: June 18, 2019
    Assignee: DOLPHIN CO., LTD.
    Inventor: Zhihui Duan
  • Patent number: 5632152
    Abstract: Artificial snow granule in granule form comprising a super absorbent polymer in granule form as a nucleus and an ice layer surrounding the nucleus is provided here. An aggregate form is provided by linkage of adjacent ice layers and/or granules. Further, a snow granule quality improver is provided. A method for making the above-mentioned snow granule in a granule or an aggregate form is also provided here.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: May 27, 1997
    Assignees: Miura Dolphins Co., Ltd., Tonen Corporation, Osaka Organic Chemical Industry Co., Ltd., Tonen Chemical Corporation, Sanyo Electric Co., Ltd., Masahisa Ohtsuka
    Inventors: Yuichiro Miura, Kazuo Hirano, Takayuki Nate, Taiji Kambayashi, Masahisa Ohtsuka, Toshitake Nagai
  • Patent number: 5556671
    Abstract: Artificial snow granule in granule form comprising a super adsorbent polymer in granule form as a nucleus and an ice layer surrounding the nucleus is provided here. An aggregate form is provided by linkage of adjacent ice layers and/or granules. Further, a snow granule quality improver is provided. A method for making the above-mentioned snow granule in a granule or an aggregate form is also provided here.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: September 17, 1996
    Assignees: Miura Dolphins Co., Ltd., Tonen Corporation, Osaka Organic Chemical Industry Co., Ltd., Tonen Chemical Corporation, Sanyo Electric Co., Ltd., Masahisa Ohtsuka
    Inventors: Yuichiro Miura, Kazuo Hirano, Takayuki Nate, Taiji Kambayashi, Masahisa Ohtsuka, Toshitake Nagai
  • Patent number: 5436039
    Abstract: Artificial snow granule in granule form comprising a super absorbent polymer in granule form as a nucleus and an ice layer surrounding the nucleus is provided here. An aggregate form is provided by linkage of adjacent two ice layers and/or two granules. Further, a snow granule quality improver is provided. A method for making the above-mentioned snow granule in granule or an aggregate form is also provided here.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: July 25, 1995
    Assignees: Miura Dolphins, Co., Ltd., Tonen Corporation, Osaka Organic Chemical Industry Co., Ltd., Tonen Chemical Corp., Sanyo Electric Co., Ltd., Ohtsuka, Masahisa, Ohizumimachi
    Inventors: Yuichiro Miura, Kazuo Hirano, Takayuki Nate, Taiji Kambayashi, Masahisa Ohtsuka, Toshitake Nagai
  • Patent number: 5266367
    Abstract: Artificial snow granule in granule form comprising a super absorbent polymer in granule form as a nucleus and an ice layer surrounding the nucleus is provided here.Artificial snow granule in an aggregate form of snow granule granules comprising super absorbent polymer in granule form as nucleus and ice layers surrounded the nucleus wherein said aggregate form is caused by a linkage of the adjacent ice layers and/or granules.Further, a snow granule quality improver is provided.A method for making the above-mentioned snow granule in granule or an aggregate form is also provided here.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: November 30, 1993
    Assignees: Miura Dolphins Co., Ltd., Tonen Corporation, Osaka Organic Chemical Industry Co., Ltd., Tonen Chemical Corp., Sanyo Electric Co., Ltd., Masahisa Ohtsuka
    Inventors: Yuichiro Miura, Kazuo Hirano, Takayuki Nate, Taiji Kambayashi, Masahisa Ohtsuka, Toshitake Nagai
  • Patent number: 5261245
    Abstract: A method for easily making an ice slab serving as the foundation of an artificial snow skiing field and artificial snow whose upper layer is powdery by flooding aqueous slurry made by adding water to granular wet water absorbent polymer on a slope of a natural skiing field or a slant or horizontal surface of a natural skiing field or indoor artificial snow skiing field equipped with a cooling system, obtaining the deposit layer of the granular wet water absorbent polymer in which water is separated from the slurry and freezing the deposit layer.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: November 16, 1993
    Assignees: Miura Dolphins Co., Ltd., Tonen Corporation, Osaka Organic Chemical Industry Co., Ltd., Tonen Chemical Corp., Sanyo Electric Co., Ltd., Ohtsuka, Masahisa
    Inventors: Haruhiko Tanaka, Taiji Kambayashi, Yasumasa Sugiyama, Toshitake Nagai, Koiti Nagata, Kohei Kubota, Kazuo Hirano
  • Patent number: 5136849
    Abstract: A snow composition is here provided which comprises ofabout 100 parts by weight of snow selected from the group comprising of natural snow, artificial snow made by a snow machine, and icy snow made by shattering ice blocks to fragments andabout 0.1 to about 10.0 parts by weight of a super absorbent polymer in granule form having an average particle size of about 20 to about 500 .mu.m before water absorption.A method for making artificial snow is also provided here.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: August 11, 1992
    Assignees: Miura Dolphins Co., Ltd., Tonen Corporation, Osaka Organic Chemical Industry Co., Ltd., Tonen Chemical Corp., Sanyo Electric Co., Ltd.
    Inventors: Yuichiro Miura, Kazuo Hirano, Takayuki Nate, Taiji Kambayashi, Masahisa Ohtsuka, Toshitake Nagai