Patents by Inventor Kunihiko Ikeda

Kunihiko Ikeda 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: 11680583
    Abstract: A construction machine includes a centrifugal fan, and a bell mouth arranged on the suction side of the centrifugal fan. The centrifugal fan has a rotatable hub, an annular shroud arranged so as to face the hub and having a suction port, and multiple blades provided between the hub and the shroud. An outlet of the bell mouth is arranged on the radially inner side of the suction port of the shroud. Each blade is formed such that: a leading edge has a convex shape protruding toward a suction surface relative to a line segment linking a connection of the leading edge with the hub and a connection of the leading edge with the shroud; and a vertex of the convex shape of the leading edge is positioned on a radially inner side of a wall surface of the outlet of the bell mouth when the suction side of the centrifugal fan is seen in an axis direction.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: June 20, 2023
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Daiwa Sato, Kazuya Kusano, Hitoshi Nishiguchi, Kunihiko Ikeda, Kenichi Hano
  • Publication number: 20210372431
    Abstract: A construction machine includes a centrifugal fan, and a bell mouth arranged on the suction side of the centrifugal fan. The centrifugal fan has a rotatable hub, an annular shroud arranged so as to face the hub and having a suction port, and multiple blades provided between the hub and the shroud. An outlet of the bell mouth is arranged on the radially inner side of the suction port of the shroud. Each blade is formed such that: a leading edge has a convex shape protruding toward a suction surface relative to a line segment linking a connection of the leading edge with the hub and a connection of the leading edge with the shroud; and a vertex of the convex shape of the leading edge is positioned on a radially inner side of a wall surface of the outlet of the bell mouth when the suction side of the centrifugal fan is seen in an axis direction.
    Type: Application
    Filed: October 10, 2019
    Publication date: December 2, 2021
    Inventors: Daiwa SATO, Kazuya KUSANO, Hitoshi NISHIGUCHI, Kunihiko IKEDA, Kenichi HANO
  • Publication number: 20100266458
    Abstract: Provided is a construction machine, which can suppress a rise in the temperature of a liquid reducing agent in a liquid reducing agent tank. The construction machine is provided, within an engine compartment 6, with plural heat exchangers including an oil cooler 27, a cooling fan 32 arranged opposite these heat exchangers to produce a cooling airflow for promoting heat dissipation from these heat exchanger, and a liquid reducing agent tank 40 for storing a liquid reducing agent to be supplied to an NOx reduction catalyst. The liquid reducing agent tank 40 is arranged upstream of the plural heat exchangers as viewed in a flowing direction of the cooling airflow.
    Type: Application
    Filed: December 2, 2008
    Publication date: October 21, 2010
    Applicant: Hitachi Construction Machinery Co., Ltd
    Inventors: Seiichiro Takeshita, Osamu Watanabe, Kunihiko Ikeda, Toshihiro Abe
  • Patent number: 6135591
    Abstract: When discharging a sheet material from an image forming apparatus after completion of image formation, at least one spur roller for discharging the trailing edge of the sheet material downward is provided. Hence, it is possible to more stably discharge the sheet material than ever, and to arrange and mount sheets of the sheet material on a discharged-sheet tray in a manner better than ever.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: October 24, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kunihiko Ikeda, Kaneji Yamada
  • Patent number: 6012809
    Abstract: An ink jet printing apparatus enables a printing operation to be performed for both surfaces of a printing medium with the use of an ink jet head for ejecting ink. The apparatus comprises components for designating either a both surface printing mode or a one surface printing mode, for applying processing liquid to the printing medium, for reducing a quantity of ejection of ink to the printing medium, and for designating either the component for applying processing liquid or that for reducing ejection quantity in the case that the both surface printing mode is designated.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: January 11, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kunihiko Ikeda, Shigeru Yoshimura
  • Patent number: 5742301
    Abstract: An ink jet apparatus is provided for printing on both surfaces or one surface of a sheet-shaped printing medium by using an ink jet head including a plurality of ink ejecting ports facing the printing medium and energy generating elements.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: April 21, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kunihiko Ikeda
  • Patent number: 5529407
    Abstract: An image recording apparatus has a first recording-sheet storing section for storing a first recording sheet, a second recording-sheet storing section for storing a second recording sheet, a serial recording head for effecting image recording on the first recording sheet while travelling with respect to the first recording sheet, a line recording head for effecting image recording on the second recording sheet when the second recording sheet is in a stationary state, a first conveying device for conveying the first recording sheet to the position of the serial recording head; and the second conveying device for conveying the second recording sheet to the position of the line recording head. With this arrangement, it is possible to selectively effect serial recording and line recording and, in addition, to effect recording from an original document as well as recording and reproduction of the thus-read original document.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: June 25, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kunihiko Ikeda, Masahiro Taniguro, Masaaki Sakai, Hiroyuki Saito, Tetsuya Ishii, Tadashi Shiina, Kenichiro Hashimoto
  • Patent number: 4887133
    Abstract: A compact printer has a sheet feeder positioned at its front wall and electrophotographic components arranged along a sheet moving path for receiving a sheet from the sheet feeder and for exposing, developing, then transferring a toner image onto the sheet. At its rear side, the printer has an image fixing unit and a discharge portion for discharging the sheet to a side output tray or onto the top wall of the printer. The discharge portion is provided with a detachably hinged, sheet turning apparatus when it is desired to discharge sheets onto the top wall, or with a detachably hinged cover with a rear opening to discharge sheets onto a rear side output tray.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: December 12, 1989
    Assignee: Ricoh Company, Ltd.
    Inventors: Kunihiko Ikeda, Shigeru Suzuki, Takashi Yokota, Akira Shimura, Yutaka Kodama, Shigeru Yamazaki, Masaichi Niro, Satoru Tomita
  • Patent number: 4701771
    Abstract: An ink jet recorder includes an ink acceptor having an ink absorber arranged to face an ink jet head, and a detector for detecting the degree of absorption ability of the ink absorber. When the detector detects the loss of absorption ability of the ink absorber, it issues an alarm signal.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: October 20, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kunihiko Ikeda
  • Patent number: 4657372
    Abstract: A printer has a record unit including a record in the form of an endless belt which moves in one direction, a charger for charging the record, an exposure unit for forming an electrostatic latent image on the charged record, a developing unit for converting the latent image into a visual image, a sheet feeder for feeding a record sheet from a stack, as separated one by one, and feeding it into close contact with the record which carries the visual image, a transfer unit for transferring the visual image from the record onto the record sheet, a fixing unit for fixing the transferred visual image on the record sheet, and a delivery unit of delivering the fixed record sheet out of the printer. As a characteristic of the invention, the record unit and the developer unit are detachably mounted together and capable of being slid out of the printer for servicing.
    Type: Grant
    Filed: October 15, 1982
    Date of Patent: April 14, 1987
    Inventors: Kunihiko Ikeda, Shigeru Suzuki, Takashi Yokota, Akira Shimura, Yutaka Kodama, Shigeru Yamazaki, Masaichi Niro, Satoru Tomita
  • Patent number: 4413899
    Abstract: A copying method for producing duplicates of an original of at least two colors by using a composite photosensitive member including more than two photosensitive layers, wherein the photosensitive member is subjected to charging more than twice and exposed to an optical image of the original more than once by changing charging and exposing conditions, to vary charge carried on the surface and in the interior of the photosensitive member. This causes two types of electrostatic image to be formed on the surface of the photosensitive member; one type includes image regions having a positive surface potential, a negative surface potential and a substantially zero surface potential respectively and the other type includes two image regions having different surface potentials of same polarity respectively, and one image regions of substantially zero surface potential, depending on differences in color between image regions of the original corresponding to the image regions on the photosensitive member.
    Type: Grant
    Filed: January 29, 1981
    Date of Patent: November 8, 1983
    Assignee: Ricoh Company, Ltd.
    Inventors: Shuichi Karasawa, Fuyuhiko Matsumoto, Shuichi Tsushima, Masatoshi Saitou, Tsutomu Ishida, Kunihiko Ikeda, Masao Yoshikawa, Tsutomu Sato
  • Patent number: 4389113
    Abstract: An improved two-color electrophotographic copying apparatus comprising a non-magnetic sleeve for supplying magnetic toner to latent electrostatic images formed on a photoconductor, for the development of said images, for use in one or both of the development section for the two colors, whereby, by means of the so-called counter electrode effect, two-color copies can be obtained in which the so-called edge effect has been completely or substantially eliminated. In one category of embodiments, a series of ridges and grooves are formed on the outer peripheral surface of the non-magnetic sleeve. The peaks of those ridges serve to decrease the effective distance between the non-magnetic sleeve and the surface of the photoconductor, which decrease in distance is advantageous in enhancing the counter electrode effect.
    Type: Grant
    Filed: May 8, 1981
    Date of Patent: June 21, 1983
    Assignee: Ricoh Company, Ltd.
    Inventors: Fuyuhiko Matsumoto, Kunihiko Ikeda, Shuichi Tsushima
  • Patent number: 4351604
    Abstract: First and second developing units (66), (67) apply toners of first and second colors respectively to a photoconductive drum (61) carrying a bipolar electrostatic image to form a bicolor toner image. A small amount of the first toner is scraped off the drum (61) in the second developing step and becomes mixed with the second toner in the second developing unit (67). The admixed first toner is separated and removed from the second toner by a separation member in the form of a roller, belt or mesh covered electrode (81) which is charged to a polarity opposite to the first toner and electrostatically attracts the same while repelling the second toner.
    Type: Grant
    Filed: April 22, 1980
    Date of Patent: September 28, 1982
    Assignee: Ricoh Company, Ltd.
    Inventors: Shuichi Karasawa, Fuyuhiko Matsumoto, Kunihiko Ikeda, Shuichi Tsushima
  • Patent number: RE37157
    Abstract: A compact printer has a sheet feeder positioned at its front wall and electrophotographic components arranged along a sheet moving path for receiving a sheet from the sheet feeder and for exposing, developing, then transferring a toner image onto the sheet. At its rear side, the printer has an image fixing unit and a discharge portion for discharging the sheet to a side output tray or onto the top wall of the printer. The discharge portion is provided with a detachably hinged, sheet turning apparatus when it is desired to discharge sheets onto the top wall, or with a detachably hinged cover with a rear opening to discharge sheets onto a rear side output tray.
    Type: Grant
    Filed: February 1, 1996
    Date of Patent: May 1, 2001
    Assignee: Ricoh Company, Ltd.
    Inventors: Kunihiko Ikeda, Shigeru Suzuki, Takashi Yokota, Akira Shimura, Yutaka Kodama, Shigeru Yamazaki, Masaichi Niro, Satoru Tomita