Patents by Inventor Hiromitsu Tomiyama

Hiromitsu Tomiyama 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: 9840270
    Abstract: In a steering system, a pair of side plates of an upper bracket support first tooth rows each including a plurality of first teeth arranged at a pitch and second tooth rows each including a plurality of second teeth arranged at the pitch. An insertion shaft supports third teeth that can come into and out of contact with the first tooth rows and fourth teeth that can come into and out of contact with the second tooth rows. One pair out of a pair of the tooth tip of each first tooth and the tooth tip of the corresponding second tooth and a pair of the tooth tip of each third tooth and the tooth tip of the corresponding fourth tooth are in the same position in a tilt direction, and the other pair are displaced from each other by a length smaller than the pitch in the tilt direction.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: December 12, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hiromitsu Tomiyama, Hidenobu Tanaka, Masayuki Nagaoka
  • Patent number: 9840269
    Abstract: A steering system includes an insertion shaft that is movable in a tilt direction C along with a column jacket, a first tooth member including a plurality of first teeth aligned along a first linear direction, and a second tooth member including a plurality of second teeth aligned along the first linear direction. A first restriction portion restricts movement of the first tooth member in the first linear direction with respect to an upper bracket. A second restriction portion is movable in the first linear direction and immovable in a second linear direction, with respect to a linear slot in the first tooth member that extends along the first linear direction. The second restriction portion restricts movement of the second tooth member in the second linear direction with respect to the first tooth member.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: December 12, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hidenobu Tanaka, Hiromitsu Tomiyama, Masayuki Nagaoka, Yoshihito Yoshihara
  • Patent number: 9783222
    Abstract: A steering system includes a lock mechanism and a releasing member. The lock mechanism includes a clamping shaft inserted through insertion holes in side plates, an operation lever that rotationally operates the clamping shaft, a rotational cam coupled to the clamping shaft so as to be rotatable integrally therewith and movable integrally therewith in an axial direction, a first clamping member that moves the rotational cam in the axial direction with respect to the side plates, and a stopper that restricts a rotation range of the clamping shaft. The releasing member includes a fitting portion located between the side plates and fitted on an outer peripheral surface of the clamping shaft so as to provide a clamping margin, and frictionally slides the fitting portion in the axial direction with respect to the clamping shaft when the rotational cam moves in the axial direction with respect to the side plates.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: October 10, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hiromitsu Tomiyama, Hidenobu Tanaka, Masayuki Nagaoka
  • Patent number: 9718490
    Abstract: A steering system includes: a first tooth member provided with a first tooth row that includes a plurality of first teeth each of which has a tooth trace extending in a lateral direction and which are aligned along a tilt direction, the first tooth row being elastically deformable in the lateral direction, and a second tooth member including a second tooth row that includes a plurality of second teeth each of which has a tooth trace extending in the lateral direction and which are aligned along the tilt direction, the second tooth member facing the first tooth member in the lateral direction. The first tooth member is supported by an upper bracket such that the first tooth row is disposed away from the upper bracket in the lateral direction. The second tooth member is movable in the tilt direction along with a column jacket.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: August 1, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hidenobu Tanaka, Hiromitsu Tomiyama, Masayuki Nagaoka, Kenichi Aota
  • Patent number: 9604663
    Abstract: A steering system includes: an upper bracket that supports a column jacket so that the column jacket is pivotable about a central shaft; a pair of first tooth rows that are supported by the upper bracket and are arranged side by side in an axial direction; and a tooth member that is pivotable together with the column jacket and is movable in a right-and-left direction. The tooth member has second teeth that are formed in two locations spaced apart from each other in the axial direction and that can mesh with the pair of the first tooth rows. The tooth tip angle of first teeth in one first tooth row of the pair of the first tooth rows is different from the tooth tip angle of the first teeth in the other first tooth row that is more distant from the central shaft than the one first tooth row.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: March 28, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hiromitsu Tomiyama, Hidenobu Tanaka, Masayuki Nagaoka
  • Publication number: 20170066468
    Abstract: A steering system includes a lock mechanism and a releasing member. The lock mechanism includes a clamping shaft inserted through insertion holes in side plates, an operation lever that rotationally operates the clamping shaft, a rotational cam coupled to the clamping shaft so as to be rotatable integrally therewith and movable integrally therewith in an axial direction, a first clamping member that moves the rotational cam in the axial direction with respect to the side plates, and a stopper that restricts a rotation range of the clamping shaft. The releasing member includes a fitting portion located between the side plates and fitted on an outer peripheral surface of the clamping shaft so as to provide a clamping margin, and frictionally slides the fitting portion in the axial direction with respect to the clamping shaft when the rotational cam moves in the axial direction with respect to the side plates.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 9, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hiromitsu TOMIYAMA, Hidenobu TANAKA, Masayuki NAGAOKA
  • Patent number: 9580100
    Abstract: A steering system includes an upper bracket having a first tooth row, a rigid tooth member, a second tooth row provided on the tooth member, a first moving member, and an elastic member disposed between the tooth member and the first moving member. The first tooth row includes a plurality of first teeth. The second tooth row includes a plurality of second teeth. The elastic member exerts a constant restoration force. The second tooth row meshes with the first tooth row when the first teeth and the second teeth are alternately arranged in a tilt direction.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: February 28, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Hiromitsu Tomiyama, Atsumune Nagatani, Hidenobu Tanaka, Masayuki Nagaoka
  • Publication number: 20170008548
    Abstract: A steering system includes: a first tooth member provided with a first tooth row that includes a plurality of first teeth each of which has a tooth trace extending in a lateral direction and which are aligned along a tilt direction, the first tooth row being elastically deformable in the lateral direction, and a second tooth member including a second tooth row that includes a plurality of second teeth each of which has a tooth trace extending in the lateral direction and which are aligned along the tilt direction, the second tooth member facing the first tooth member in the lateral direction. The first tooth member is supported by an upper bracket such that the first tooth row is disposed away from the upper bracket in the lateral direction. The second tooth member is movable in the tilt direction along with a column jacket.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 12, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hidenobu TANAKA, Hiromitsu TOMIYAMA, Masayuki NAGAOKA, Kenichi AOTA
  • Publication number: 20170008547
    Abstract: In a steering system, a pair of side plates of an upper bracket support first tooth rows each including a plurality of first teeth arranged at a pitch and second tooth rows each including a plurality of second teeth arranged at the pitch. An insertion shaft supports third teeth that can come into and out of contact with the first tooth rows and fourth teeth that can come into and out of contact with the second tooth rows. One pair out of a pair of the tooth tip of each first tooth and the tooth tip of the corresponding second tooth and a pair of the tooth tip of each third tooth and the tooth tip of the corresponding fourth tooth are in the same position in a tilt direction, and the other pair are displaced from each other by a length smaller than the pitch in the tilt direction.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 12, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hiromitsu TOMIYAMA, Hidenobu TANAKA, Masayuki NAGAOKA
  • Publication number: 20170008546
    Abstract: A steering system includes an insertion shaft that is movable in a tilt direction C along with a column jacket, a first tooth member including a plurality of first teeth aligned along a first linear direction, and a second tooth member including a plurality of second teeth aligned along the first linear direction. A first restriction portion restricts movement of the first tooth member in the first linear direction with respect to an upper bracket. A second restriction portion is movable in the first linear direction and immovable in a second linear direction, with respect to a linear slot in the first tooth member that extends along the first linear direction. The second restriction portion restricts movement of the second tooth member in the second linear direction with respect to the first tooth member.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 12, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hidenobu TANAKA, Hiromitsu TOMIYAMA, Masayuki NAGAOKA, Yoshihito YOSHIHARA
  • Publication number: 20170008549
    Abstract: A steering system includes: an upper bracket that supports a column jacket so that the column jacket is pivotable about a central shaft; a pair of first tooth rows that are supported by the upper bracket and are arranged side by side in an axial direction; and a tooth member that is pivotable together with the column jacket and is movable in a right-and-left direction. The tooth member has second teeth that are formed in two locations spaced apart from each other in the axial direction and that can mesh with the pair of the first tooth rows. The tooth tip angle of first teeth in one first tooth row of the pair of the first tooth rows is different from the tooth tip angle of the first teeth in the other first tooth row that is more distant from the central shaft than the one first tooth row.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 12, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hiromitsu TOMIYAMA, Hidenobu TANAKA, Masayuki NAGAOKA
  • Patent number: 9446781
    Abstract: In a steering system configured such that occurrence of a half lock is suppressed, when a body portion of a tooth member is pressed in a lock operation of locking the position of a steering column, the tooth member is extended to move a pair of second tooth row forming portions away from each other obliquely with respect to a lateral direction of an elongate tilt hole along the outer surface of a fastening side plate.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: September 20, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Hidenobu Tanaka, Masayuki Nagaoka, Hiromitsu Tomiyama, Atsumune Nagatani
  • Publication number: 20160144885
    Abstract: In a steering system configured such that occurrence of a half lock is suppressed, when a body portion of a tooth member is pressed in a lock operation of locking the position of a steering column, the tooth member is extended to move a pair of second tooth row forming portions away from each other obliquely with respect to a lateral direction of an elongate tilt hole along the outer surface of a fastening side plate.
    Type: Application
    Filed: November 12, 2015
    Publication date: May 26, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Hidenobu TANAKA, Masayuki NAGAOKA, Hiromitsu TOMIYAMA, Atsumune NAGATANI
  • Publication number: 20160144886
    Abstract: A steering system includes an upper bracket having a first tooth row, a rigid tooth member, a second tooth row provided on the tooth member, a first moving member, and an elastic member disposed between the tooth member and the first moving member. The first tooth row includes a plurality of first teeth. The second tooth row includes a plurality of second teeth. The elastic member exerts a constant restoration force. The second tooth row meshes with the first tooth row when the first teeth and the second teeth are alternately arranged in a tilt direction.
    Type: Application
    Filed: November 17, 2015
    Publication date: May 26, 2016
    Inventors: Hiromitsu TOMIYAMA, Atsumune NAGATANI, Hidenobu TANAKA, Masayuki NAGAOKA
  • Publication number: 20130028655
    Abstract: It is an object of the present invention to provide a ball joint mount structure and a ball joint mounting method, which can distribute grease between an outer periphery of a shaft and a sliding contact surface of a lip while preventing the grease from being supplied into a mount hole. The inventive ball joint mount structure includes a grease retaining groove (55) provided in a portion of a lower surface (52b) of a knuckle arm (51) spaced a distance from a peripheral edge of a knuckle hole (53) for retaining grease (G). After a shaft (12) is inserted into the knuckle hole (53) to bring an upper end portion (5a) into contact with the lower surface (52b) with the grease (G) retained in the grease retaining groove (55), the ball stud (4) is fixed to the knuckle arm (51).
    Type: Application
    Filed: June 28, 2012
    Publication date: January 31, 2013
    Applicant: JTEKT CORPORATION
    Inventors: Tetsuo IKEDA, Hiromitsu TOMIYAMA
  • Patent number: 5707747
    Abstract: The present invention provides novel amine compounds useful as electron-transporting materials to be incorporated in organic electro-luminescence devices. More particularly, the present invention provides an organic electro-luminescence device (organic EL device) which can find wide application in various display units, requires a low applied voltage and exhibits a high luminance and an excellent stability.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: January 13, 1998
    Assignees: Hodogaya Chemical Co., Ltd., Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromitsu Tomiyama, Masahiko Oshino, Ikuko Ihara, Naoko Nakanishi, Mutsumi Suzuki, Masao Fukuyama, Mutsuaki Murakami, Taro Nambu
  • Patent number: 5639914
    Abstract: The present invention provides novel amine compounds useful as electron-transporting materials to be incorporated in organic electro-luminescence devices. More particularly, the present invention provides an organic electro-luminescence device (organic EL device) which can find wide application in various display units, requires a low applied voltage and exhibits a high luminance and an excellent stability.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: June 17, 1997
    Assignees: Hodogaya Chemical Co., Ltd., Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromitsu Tomiyama, Masahiko Oshino, Ikuko Ihara, Naoko Nakanishi