Patents by Inventor Makoto ZEMBUTSU

Makoto ZEMBUTSU 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).

  • Tapered roller bearing
    Patent number: 11306774
    Abstract: A holder of a tapered roller bearing is made of a resin, has a first gap between an axially inner end surface of a small-diameter-side annular part and small-diameter-side end surfaces of tapered rollers, has a second gap between an axially inner end surface of a large-diameter-side annular part and large-diameter-side end surfaces of the tapered rollers, and is provided to be capable of moving within a prescribed range along the axial direction. The surface of the axially inner end surface of the large-diameter-side annular part is rough, the large-diameter-side annular part is provided with one or more grooves which are oil-holding parts that hold the lubricating oil, and ends of the grooves are positioned to be capable of coming into contact with the tapered rollers.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: April 19, 2022
    Assignee: NSK LTD.
    Inventors: Makoto Zembutsu, Hiroaki Yamanaka, Tomoyuki Miyazaki, Hiroki Maejima
  • TAPERED ROLLER BEARING
    Publication number: 20210054877
    Abstract: A holder of a tapered roller bearing is made of a resin, has a first gap between an axially inner end surface of a small-diameter-side annular part and small-diameter-side end surfaces of tapered rollers, has a second gap between an axially inner end surface of a large-diameter-side annular part and large-diameter-side end surfaces of the tapered rollers, and is provided to be capable of moving within a prescribed range along the axial direction. The surface of the axially inner end surface of the large-diameter-side annular part is rough, the large-diameter-side annular part is provided with one or more grooves which are oil-holding parts that hold the lubricating oil, and ends of the grooves are positioned to be capable of coming into contact with the tapered rollers.
    Type: Application
    Filed: March 8, 2019
    Publication date: February 25, 2021
    Applicant: NSK LTD.
    Inventors: Makoto ZEMBUTSU, Hiroaki YAMANAKA, Tomoyuki MIYAZAKI, Hiroki MAEJIMA