Patents by Inventor Hiroyoshi Ario

Hiroyoshi Ario 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).

  • Hydraulic passages for oil pump for speed reducer used in electric vehicles
    Patent number: 5901802
    Abstract: Hydraulic passages for an oil pump for a speed reducer used in electric vehicle include a first passage for connecting an inlet port of an oil pump to an oil reservoir through a first check valve, a second passage for connecting an outlet port of the oil pump to a discharged-oil demand part through a second check valve, a third passage for connecting the outlet port to the oil reservoir through a third check valve, and a fourth passage for connecting the inlet port to the discharged-oil demand part through a fourth check valve. The check valves are disposed such that, upon normal rotation of the oil pump, the first and second check valves are opened, and upon reverse rotation thereof, the third and fourth check valves are opened.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: May 11, 1999
    Assignees: Nissan Motor Co., Ltd., Aichi Machine Industry Co., Ltd.
    Inventors: Yoshio Sunohara, Tozo Yamada, Akihiro Morita, Hiroyoshi Ario