Patents by Inventor Takayuki Oyama

Takayuki Oyama 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).

  • Publication number: 20180363802
    Abstract: A valve stem seal with significantly improved sealing performance while improving workability when fitting the valve stem seal to a valve stem guide. An inner peripheral surface of a fitting section 20B is provided with a plurality of annular seal protrusions which respectively include first inclined surfaces 25a and 26a each having a diameter that increases from a radially inward tip toward a seal section 20A side, and second inclined surfaces 25b and 26b each having a diameter that increases from a radially inward tip toward a side opposite to the seal section 20A. The first seal protrusion 25 which is closest to the seal section 20A is configured so that an inclination of the second inclined surface 25b is smaller than that of the first inclined surface 25a, and the second seal protrusion 26 which is farthest from the seal section 20A is configured so that an inclination of the first inclined surface 26a is smaller than that of the second inclined surface 26b.
    Type: Application
    Filed: December 6, 2016
    Publication date: December 20, 2018
    Inventors: Takayuki OYAMA, Nobuhiro NISHIMURA, Hiroshi ONODERA, Masamichi KISHIRO
  • Patent number: 8279468
    Abstract: A printing device connects to at least one client computer via a network. The printing device includes a storage section that stores image formats for general-purpose image format data. A control section converts page description language (PDL) data sent via the network from the at least one client computer into pixel map format data, converts the pixel map format data into general-purpose image format data based on one of the image formats stored in the storage section, and sends via the network to the at least one client computer the general-purpose image format data together with a source information file containing source information indicating the source of the PDL data. A memory section stores the pixel map format data obtained through the conversion performed by the control section. A printer prints the pixel map format data.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: October 2, 2012
    Assignee: Seiko I Infotech Inc.
    Inventor: Takayuki Oyama
  • Patent number: 8222977
    Abstract: A waveguide circuit is provided, in which fixing a metal cover to a waveguide body with screws can prevent radiowave leakage suitably without any application of the conductive adhesive, solder and braze as a material for the radiowave leakage prevention. A metal plate is provided at the end of an aperture of a waveguide body in a radiowave traveling direction and overlaps with the end of a metal cover.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: July 17, 2012
    Assignee: NEC Corporation
    Inventors: Takayuki Oyama, Naotsugu Watanabe
  • Publication number: 20110205000
    Abstract: A division type waveguide circuit is provided, in which fixing a metal cover to a waveguide body with screws can prevent radiowave leak suitably without any application of the conductive adhesive, solder and braze as a material for the radiowave leak prevention. A radiowave leak preventing plate 8 is provided at the end of an opening area 3 of a waveguide body 2 in a radiowave traveling direction and overlaps with the end of a metal cover 4.
    Type: Application
    Filed: March 5, 2008
    Publication date: August 25, 2011
    Applicant: NEC CORPORATION
    Inventors: Takayuki Oyama, Naotsugu Watanabe
  • Publication number: 20110006854
    Abstract: Provided is a short-slot type waveguide coupler which can be applied to a transmission line that transmits broadband signals. The waveguide coupler according to the present invention is a short-slot type waveguide couplers wherein it includes a plurality of waveguide units which have a separate port for inputting or outputting signals respectively and a joint unit which combines a plurality of waveguide units and have a specific length in a predetermined direction. Here, at least one waveguide unit extends to a direction that forms a predetermined angle from a longitudinal direction of the joint unit.
    Type: Application
    Filed: March 10, 2009
    Publication date: January 13, 2011
    Inventor: Takayuki Oyama
  • Patent number: 7772939
    Abstract: An apparatus adapted for easily performing polarization switching is disclosed. Within a second waveguide connected to a first waveguide, there is embedded a polarization transformation circuit in the state rotated relative to the second waveguide at an angle set, based on a reflection characteristic indicating a characteristic of a reflection coefficient with respect to a polarization frequency.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: August 10, 2010
    Assignee: NEC Corporation
    Inventors: Naotsugu Watanabe, Takayuki Oyama
  • Publication number: 20080309016
    Abstract: To prevent falling away of a backup ring (3) from a main lip (12) when uninstalled to a device and prevent inverse assembling, a sealing device is provided with an attaching ring (11), a main lip (12) integrally provided on an inner periphery of the attaching ring, and a backup ring (3) supported to a backup ring support portion (15) formed on an inner periphery of the main lip (12) so as to be positioned at an atmospheric air side than a sliding surface with a shaft, the backup ring support portion (15) and the backup ring (3) are fitted to each other with their fitting surfaces (15a, 31a) which become smaller in diameter relatively toward an outer side in an axial direction, whereby the backup ring (3) is fitted to the backup ring support portion (15) and has directionality in the fitting surfaces (15a, 31a).
    Type: Application
    Filed: June 4, 2008
    Publication date: December 18, 2008
    Applicant: NOK CORPORATION
    Inventors: Kentaro OZAWA, Takayuki OYAMA
  • Publication number: 20080212126
    Abstract: To provide a printing device capable of automatically sending pixel map format data for printing to an external computer. Source information of PDL data is held, which can be obtained when the PDL data is received from a print requesting client computer. The PDL data is converted into pixel map format data for printing. The pixel map format data for printing is printed and also converted into general-purpose image format data. The general-purpose image format data and the source information are automatically sent to an image transmission destination client computer specified in advance.
    Type: Application
    Filed: August 17, 2007
    Publication date: September 4, 2008
    Inventor: Takayuki Oyama
  • Publication number: 20080068274
    Abstract: An apparatus adapted for easily performing polarization switching is disclosed. Within a second waveguide connected to a first waveguide, there is embedded a polarization transformation circuit in the state rotated relative to the second waveguide at an angle set, based on a reflection characteristic indicating a characteristic of a reflection coefficient with respect to a polarization frequency.
    Type: Application
    Filed: September 18, 2007
    Publication date: March 20, 2008
    Applicant: NEC CORPORATION
    Inventors: Naotsugu Watanabe, Takayuki Oyama