Patents by Inventor Kazuyuki Umezaki

Kazuyuki Umezaki 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).

  • Water pump bearing unit
    Patent number: 4765761
    Abstract: A water pump bearing unit for satisfactorily sealing an impeller side of the pump comprises a plurality of rollers installed in the annular space between a water pump shaft and a pulley respectively on one and the other ends thereof and an outer ring surrounding the shaft; an annular seal member with two lips, each having an interference, inwardly and outwardly extended in the axial direction between the end of the outer ring on the impeller side and the outer peripheral surface of the shaft; and an annular seal member with a lip having an interference inwardly extended in the axial direction between the end of the outer ring on the pulley side and the outer peripheral surface of the shaft.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: August 23, 1988
    Assignee: Koyo Seiko Co., Ltd.
    Inventor: Kazuyuki Umezaki