Patents by Inventor Dai-heng Chen

Dai-heng Chen 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).

  • Impact absorber device
    Publication number: 20110226574
    Abstract: An impact absorber device includes at least one first portion having a short tubular shape, and at least one second portion having a short tubular shape concentrically disposed in a stacked relationship with the first portion. The first portion and the second portion engage with each other at an engagement portion which is inclined with respect to a concentric axis of the first portion and the second portion. With this arrangement, impact energy is absorbed in the case of collision accidents of vehicles such as an automobile and trains, and the dropping accidents of lifts such as elevators.
    Type: Application
    Filed: May 23, 2011
    Publication date: September 22, 2011
    Inventors: Dai-heng Chen, Hiroyuki Tanaka, Shigeyuki Haruyama, Hironobu Nisitani
  • Impact absorber device
    Patent number: 7967118
    Abstract: An impact absorber device includes at least one first portion having a short tubular shape, and at least one second portion having a short tubular shape concentrically disposed in a stacked relationship with the first portion. The first portion and the second portion engage with each other at an engagement portion which is inclined with respect to a concentric axis of the first portion and the second portion. With this arrangement, impact energy is absorbed in the case of collision accidents of vehicles such as an automobile and trains, and the dropping accidents of lifts such as elevators.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: June 28, 2011
    Inventors: Dai-heng Chen, Hiroyuki Tanaka, Shigeyuki Haruyama, Hironobu Nisitani
  • Impact Absorber Device
    Publication number: 20070251782
    Abstract: An impact absorber device includes at least one first portion having a short tubular shape, and at least one second portion having a short tubular shape concentrically disposed in a stacked relationship with the first portion. The first portion and the second portion engage with each other at an engagement portion which is inclined with respect to a concentric axis of the first portion and the second portion. With this arrangement, impact energy is absorbed in the case of collision accidents of vehicles such as an automobile and trains, and the dropping accidents of lifts such as elevators.
    Type: Application
    Filed: August 30, 2005
    Publication date: November 1, 2007
    Inventors: Dai-heng Chen, Hiroyuki Tanaka, Shigeyuki Haruyama, Hironobu Nisitani