Patents by Inventor Tatsushi Umayahara

Tatsushi Umayahara 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).

  • Sieving system, and methods of notifying information, driving and feeding
    Patent number: 9022220
    Abstract: A sieving system includes a filter; a blade stirring a powder accumulated on the filter; a driver driving the blade; a notifier notifying predetermined information of a status of the filter, based on a load of the driver while driving the blade.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: May 5, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kaori Ozeki, Tatsushi Umayahara, Hideo Ichikawa, Tetsuya Yoshida
  • Sieving device, sieving device for developing device, and powder-charging device
    Patent number: 8973759
    Abstract: A sieving device including a hollow cylindrical body, a filter disposed at a bottom portion of the hollow cylindrical body, and a blade configured to rotate in close proximity to the filter around a rotation axis thereof crossing the filter to thereby stir powder supplied to the hollow cylindrical body.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: March 10, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Kaori Ozeki, Tatsushi Umayahara, Takashi Ono, Masayoshi Suzuki, Teruo Shibata, Keiichi Yano, Masato Suzuki, Eiichi Masushio, Hiroshi Sano, Yusuke Uchida, Junji Yamabe, Seiji Terazawa, Masashi Hasegawa
  • Fluid transferer, fluid filling apparatus and fluid transfer method
    Patent number: 8931524
    Abstract: A fluid transferer, including a volume changing part; a reciprocating member configured to reciprocate to expand a volume of the volume changing part to draw a fluid from an upstream side of a transfer direction and compress the volume thereof to transfer the drawn fluid to a downstream side thereof with pressure; and a drive controller configured to control reciprocation of the reciprocating member such that a time for compressing the volume of the volume changing part is longer than a time for expanding the volume thereof.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: January 13, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuyoshi Morii, Tatsushi Umayahara, Yusuke Uchida
  • SIEVING SYSTEM, AND METHODS OF NOTIFYING INFORMATION, DRIVING AND FEEDING
    Publication number: 20130319913
    Abstract: A sieving system includes a filter; a blade stirring a powder accumulated on the filter; a driver driving the blade; a notifier notifying predetermined information of a status of the filter, based on a load of the driver while driving the blade.
    Type: Application
    Filed: May 8, 2013
    Publication date: December 5, 2013
    Inventors: Kaori OZEKI, Tatsushi UMAYAHARA, Hideo ICHIKAWA, Tetsuya YOSHIDA
  • FLUID TRANSFERER, FLUID FILLING APPARATUS AND FLUID TRANSFER METHOD
    Publication number: 20120285540
    Abstract: A fluid transferer, including a volume changing part; a reciprocating member configured to reciprocate to expand a volume of the volume changing part to draw a fluid from an upstream side of a transfer direction and compress the volume thereof to transfer the drawn fluid to a downstream side thereof with pressure; and a drive controller configured to control reciprocation of the reciprocating member such that a time for compressing the volume of the volume changing part is longer than a time for expanding the volume thereof.
    Type: Application
    Filed: April 5, 2012
    Publication date: November 15, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Kazuyoshi MORII, Tatsushi UMAYAHARA, Yusuke UCHIDA
  • SIEVING DEVICE, SIEVING DEVICE FOR DEVELOPING DEVICE, AND POWDER-CHARGING DEVICE
    Publication number: 20120234735
    Abstract: A sieving device including a hollow cylindrical body, a filter disposed at a bottom portion of the hollow cylindrical body, and a blade configured to rotate in close proximity to the filter around a rotation axis thereof crossing the filter to thereby stir powder supplied to the hollow cylindrical body.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 20, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hideo ICHIKAWA, Kaori Ozeki, Tatsushi Umayahara, Takashi Ono, Masayoshi Suzuki, Teruo Shibata, Keiichi Yano, Masato Suzuki, Eiichi Masushio, Hiroshi Sano, Yusuke Uchida, Junji Yamabe, Seiji Terazawa, Masashi Hasegawa