Patents by Inventor Tsuyoshi Umeda

Tsuyoshi Umeda 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).

  • Gravity compensating mechanism for articulated type industrial robots
    Patent number: 5115178
    Abstract: Herein disclosed is a gravity compensating mechanism for an articulated type industrial robot having upper and lower arms whirling in the direction of gravity. The upper and lower arm gravity compensating mechanism includes a cam mechanism and an elastic member in the robot to solve problems: that the whirling range of the robot arms is narrowed by the spring means of the gravity compensating mechanism; that the gravity compensating mechanism is disposed outside of the robot arms to restrict the working space; and that it is difficult to disposed the gravity compensating mechanism for the upper arm.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: May 19, 1992
    Assignee: Seiko Instruments Inc.
    Inventor: Tsuyoshi Umeda