Patents by Inventor Kenji Muraji

Kenji Muraji 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).

  • Brake apparatus for automatic door
    Patent number: 4698622
    Abstract: A brake apparatus for automatic doors including a speed pulse signal output device for providing speed pulse signals at a time interval inversely proportional to the door speed of an automatic door, a brake for slowing the door speed, a braking position detector for detecting braking position when the brake starts braking, a brake effect measurer for measuring the effect of the brake and a braking power controller for adjusting the braking power of the brake in accordance with the measured braking effect whereby the motion of the door is kept constant irrespective of the door weight and other conditions.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: October 6, 1987
    Assignee: Daihatsu Diesel Mfg. Co., Ltd.
    Inventors: Teruo Goto, Yoshirou Takata, Kenji Muraji, Mikio Higashi