Patents by Inventor Akira Nakaegawa

Akira Nakaegawa 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).

  • Air-floating belt conveyor device
    Patent number: 6170644
    Abstract: An endless belt rotates between a tail pulley and a head pulley. The belt is floated in a tubular belt support by blowing air out of air blowing bores of the belt support, and runs from the tail pulley to the head pulley. A ultra-high molecular polyethylene layer is applied on the inner circumferential surface of the belt support, opposing to the belt, thereby assuring smooth running of the belt.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: January 9, 2001
    Assignee: Bridgestone Corporation
    Inventors: Akira Nakaegawa, Shinichi Sumino, Akihiko Yokozi, Motohiro Shiraishi
  • Toothed belt and toothed belt-adapted pulley
    Patent number: 5405299
    Abstract: A toothed belt and belt-adapted pulley system provides a high-load capacity and increased durability by reducing stress concentrations on dedendum portions and further preventing localized bending of belt tensile cords. Smooth engagement of elastic teeth of a belt is possible due to minimization of interference between the elastic teeth upon engagement or disengagement with a pulley. Reduced vibration, low noise, and a reduction in skipping under high loads result from the inventive system. Each tooth of the belt has a peripheral length m.sub.0 and a dedendum portion with a length m.sub.1, where m.sub.1 /m.sub.0 is 0.1 or less. Each tooth of the pulley has a peripheral length n.sub.0 and a dedendum portion having a length n.sub.1, where n.sub.1 /n.sub.0 is 0.1 or less.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: April 11, 1995
    Assignee: Bridgestone Corporation
    Inventors: Takaharu Kubo, Reiji Sato, Takeshi Oba, Akira Nakaegawa, Yoshihide Fukahori