Patents by Inventor Katsumi Ikizawa

Katsumi Ikizawa 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).

  • Variable-speed passenger conveyer and handrail device thereof
    Patent number: 6138816
    Abstract: A variable-speed passenger conveyer comprises: endless driving chains which disengage the pallets at an acceleration zone and high-speed zone; a screw shaft which has a pitch that changes step by step so as to accelerate or decelerate the palettes; high-speed driving chains which engage the palettes at the high-speed zone to transport the palettes at high speed; and a driving system.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: October 31, 2000
    Assignee: NKK Corporation
    Inventors: Tomoaki Sato, Katsumi Ikizawa, Shinichiro Aoe, Ryuichi Okuno