Patents by Inventor Kazumori Hirabayashi

Kazumori Hirabayashi 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).

  • Planetary gear transmission
    Patent number: 5295925
    Abstract: A two-stage planetary gear transmission having a first-stage planetary gear transmission and a second-stage planetary gear transmission is disclosed, wherein the carrier of the second-stage planetary gear transmission comprises first and second carrier parts integrally connected with each other. A hollow pinion shaft formed thereon with the sun gear of the second stage is rotationally supported on the first carrier part via a deep-channel ball bearing in a cantilevered condition. A carrier of the first stage for supporting planetary gears of the first stage is integrally formed on the end of the hollow pinion shaft of the second stage. A lubricant layer of about 15 .mu.m to about 20 .mu.m in width is formed between an inner race member of a planetary bearing and a planetary shaft for each of the planetary gears of the second stage.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: March 22, 1994
    Assignee: Harmonic Drive Systems, Inc.
    Inventor: Kazumori Hirabayashi