Patents by Inventor Daijiro Shiraishi

Daijiro Shiraishi 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: 6857997
    Abstract: A bio cell cleaning rotor assembled in a centrifuge. The rotor includes a plurality of test tube holders for holing a plurality of test tubes. The holders are pivotally movably supported to a rotor body so that the test tube holders are moved toward a horizontal direction upon application of centrifugal force. A cleaning liquid distributor is positioned above the rotor and is rotatable together with the rotor for distributing even amount of cleaning liquid to the plurality of test tubes. The distributor includes a disc like upper segment and a disc like lower segment in opposition thereto. The upper and lower distribution segments are molded products and have radially outer side flat sections in intimate contact with each other. A plurality of radial grooves are formed in at least one of the flat sections. The radial grooves serving as cleaning liquid distribution nozzles each having radially outer end open toward each opening of each test tube.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: February 22, 2005
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Kenji Yamada, Kazuhiko Murayama, Daijiro Shiraishi
  • Patent number: 6846281
    Abstract: A bio cell cleaning centrifuge having a detachable inner chamber body. The centrifuge includes a rotor detachable from a drive mechanism. Test tube holders are pivotally movably supported on the rotor for holding test tubes. A cleaning liquid distributor is detachably disposed on the rotor for supplying cleaning liquid to the respective test tubes. A bowl detachable from the drive mechanism is disposed below the test tube holders. The inner chamber body is disposed below the bowl for receiving therein supernatant liquid discharged out of the test tubes during rotation of the rotor. The inner chamber body is detachably mounted on a main case. The inner chamber body is detached after the distributor, the rotor, and the bowl are detached.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: January 25, 2005
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Kazuhiko Murayama, Kenji Yamada, Daijiro Shiraishi
  • Publication number: 20030216238
    Abstract: A bio cell cleaning rotor assembled in a centrifuge. The rotor includes a plurality of test tube holders for holing a plurality of test tubes. The holders are pivotally movably supported to a rotor body so that the test tube holders are moved toward a horizontal direction upon application of centrifugal force. A cleaning liquid distributor is positioned above the rotor and is rotatable together with the rotor for distributing even amount of cleaning liquid to the plurality of test tubes. The distributor includes a disc like upper segment and a disc like lower segment in opposition thereto. The upper and lower distribution segments are molded products and have radially outer side flat sections in intimate contact with each other. A plurality of radial grooves are formed in at least one of the flat sections. The radial grooves serving as cleaning liquid distribution nozzles each having radially outer end open toward each opening of each test tube.
    Type: Application
    Filed: March 13, 2003
    Publication date: November 20, 2003
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Kenji Yamada, Kazuhiko Murayama, Daijiro Shiraishi
  • Publication number: 20030216237
    Abstract: A bio cell cleaning centrifuge having a detachable inner chamber body. The centrifuge includes a rotor detachable from a drive mechanism. Test tube holders are pivotally movably supported on the rotor for holding test tubes. A cleaning liquid distributor is detachably disposed on the rotor for supplying cleaning liquid to the respective test tubes. A bowl detachable from the drive mechanism is disposed below the test tube holders. The inner chamber body is disposed below the bowl for receiving therein supernatant liquid discharged out of the test tubes during rotation of the rotor. The inner chamber body is detachably mounted on a main case. The inner chamber body is detached after the distributor, the rotor, and the bowl are detached.
    Type: Application
    Filed: March 13, 2003
    Publication date: November 20, 2003
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Kazuhiko Murayama, Kenji Yamada, Daijiro Shiraishi