Patents by Inventor Yasunari Hamaya

Yasunari Hamaya 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: 9303768
    Abstract: A valve stem seal device has a valve stem guide, a cylindrical metallic ring retained to an outer periphery of the valve stem guide, a rubbery elastic seal lip integrally formed in one end side of the metallic ring, and hermetically sliding to the valve stem, and a valve stem seal having the cylindrical metallic ring and the seal lip and fixed to the valve stem guide side. The valve stem seal device has a stop ring retained between a circular-truncated-cone-shaped surface which is expanded toward a side of the seal lip formed in an outer peripheral surface of the valve stem guide, and a cylindrical inner peripheral surface of the metallic ring. The stop ring has a cut part, and a movement limiting means for limiting a movement in an axial direction of the stop ring is provided in the other end side of the metallic ring.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: April 5, 2016
    Assignee: NOK Corporation
    Inventors: Yasunari Hamaya, Kokichi Hamamoto
  • Publication number: 20140077459
    Abstract: A valve stem seal device has a valve stem guide, a cylindrical metallic ring retained to an outer periphery of the valve stem guide, a rubbery elastic seal lip integrally formed in one end side of the metallic ring, and hermetically sliding to the valve stem, and a valve stem seal having the cylindrical metallic ring and the seal lip and fixed to the valve stem guide side. The valve stem seal device has a stop ring retained between a circular-truncated-cone-shaped surface which is expanded toward a side of the seal lip formed in an outer peripheral surface of the valve stem guide, and a cylindrical inner peripheral surface of the metallic ring. The stop ring has a cut part, and a movement limiting means for limiting a movement in an axial direction of the stop ring is provided in the other end side of the metallic ring.
    Type: Application
    Filed: November 29, 2011
    Publication date: March 20, 2014
    Applicant: NOK CORPORATION
    Inventors: Yasunari Hamaya, Kokichi Hamamoto
  • Patent number: 7789210
    Abstract: To make it unnecessary to insert a plate spring as a separate part between a metal ring (2) and a mating member (11) to be coupled therewith such as a clutch plate, and reduce the number of parts and the assembly manhours, the sealing device (1) includes the metal ring (2) and seal sections (3) such as packings supported by the metal ring (2), and the metal ring (2) is provided with a intimate-contact region (4) for intimately contacting to the mating member (11) to be coupled, wherein the sealing device (1) is characterized in that the intimate-contact region (4) of the metal ring (2) is integrally formed with pawl-like intimate-contact sections (6) which are in the form of a pawl and which exert spring force on the mating member (11) to be coupled, and is used, for example, as a bonded piston seal (BPS) in an automatic transmission.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: September 7, 2010
    Assignee: NOK Corporation
    Inventors: Yasunari Hamaya, Kiichiro Goto, Ken Yoshikawa, Shinji Nagasawa, Yoshiyuki Kanzaki, Yasushi Sugiyama, Hiroyuki Nikamoto
  • Publication number: 20080023893
    Abstract: In a hermetically sealing device provided by fitting and mounting a seal member on an annular member, fitting strength between the annular member and the seal member is reduced. A seal member (7) is provided with a reinforcing ring (7b), a contact part (72), which is integrally provided with the reinforcing ring (7b) and contacts a first outer circumference skirt part (13a) when it is fitted in the first outer circumference skirt part (13a) of a piston member (11), and a seal main body (7a) which has a seal lip (71) which hermetically contacts a circumference plane of a piston inserting hole (5).
    Type: Application
    Filed: March 11, 2005
    Publication date: January 31, 2008
    Applicant: NOK CORPORATION
    Inventors: Yasunari Hamaya, Shinichiro Taguchi, Yoshiyuki Kanzaki, Kiichiro Goto
  • Publication number: 20070256557
    Abstract: To make it unnecessary to insert a plate spring as a separate part between a metal ring (2) and a mating member (11) to be coupled therewith such as a clutch plate, and reduce the number of parts and the assembly manhours, the sealing device (1) includes the metal ring (2) and seal sections (3) such as packings supported by the metal ring (2), and the metal ring (2) is provided with a intimate-contact region (4) for intimately contacting to the mating member (11) to be coupled, wherein the sealing device (1) is characterized in that the intimate-contact region (4) of the metal ring (2) is integrally formed with pawl-like intimate-contact sections (6) which are in the form of a pawl and which exert spring force on the mating member (11) to be coupled, and is used, for example, as a bonded piston seal (BPS) in an automatic transmission.
    Type: Application
    Filed: June 6, 2005
    Publication date: November 8, 2007
    Applicant: NOK CORPORATION
    Inventors: Yasunari Hamaya, Kiichiro Goto, Ken Yoshikawa, Shinji Nagasawa, Yoshiyuki Kanzaki, Yasushi Sugiyama, Hiroyuki Nikamoto
  • Patent number: 5678828
    Abstract: A sealing device comprises an annular first seal member composed of a rubber-like elastic member and a metal ring member for reinforcement and an annular second seal member composed of a sliding member formed of a resin material and a rubber-like elastic member. The first seal member is provided with a seal lip extending towards a fluid side to be sealed and slidably contacting, in a sealed manner, an objective rotational shaft which is slidable relative to the seal lip, and the first seal member is also with provided an annular recessed portion, formed to an end surface of the first seal member on a side opposite to the fluid side, to which the second seal member is fitted. The second seal member has an endless shape. An outer peripheral portion of the elastic member of the second seal member is engaged with an inner peripheral wall of the annular recessed portion of the first seal member, and the sliding member of the second seal member slidably contact, in a sealed manner, the rotational shaft.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: October 21, 1997
    Assignee: NOK Corporation
    Inventor: Yasunari Hamaya