Patents by Inventor Akiya Maeda

Akiya Maeda 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).

  • Stacker crane in a warehouse
    Patent number: 5655870
    Abstract: A fork-lift apparatus for use in a stacker crane has a running apparatus for traveling forward and backward and a carriage provided with a fork device and arranged for upward and downward movements by a lift apparatus for the purpose of carrying a load with the fork device to and from a desired rack in a multi-tier automatic warehouse. In particular, the carriage has at its lower region a swivel device, a swivel frame driven by the swivel device for rotating movement, and a ram fork provided in the swivel frame as driven by a drive device for movement.
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: August 12, 1997
    Assignees: Kawasaki Steel Corporation, Okumura Machinery Corporation
    Inventors: Sakihiko Yasuhara, Gennosuke Inoue, Shunji Kishimoto, Akiya Maeda, Katsuaki Murakami, Katsuhisa Haruta
  • Rock crushing device
    Patent number: 4711501
    Abstract: A rock crushing device according to the present invention is designed to crush rocks by the use of the expansion pressure generated when an elastic expandable member of a cylindrical configuration is expanded by pressure fluid to be injected into looped pockets provided within the elastic member. The elastic member, made of rubber or similar materials, is provided tightly to cover around a metal shaft having a fluid passage to introduce pressure fluid into the looped pockets of the elastic member.
    Type: Grant
    Filed: July 26, 1985
    Date of Patent: December 8, 1987
    Assignees: Okumura Machinery Corporation, Seibu Polymer Kasei Kabushiki Kaisha
    Inventors: Akiya Maeda, Mituya Sakai, Yukinobu Masaka, Masahiro Nomura, Yasuo Yamada, Tetsuro Tatsuhama