Patents by Inventor Demeng Chen

Demeng Chen 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).

  • Load weighing system for a heavy machinery
    Patent number: 6225574
    Abstract: A hoisting machine including a device supported from a structure, the device holding the material to be lifted, the structure being movable to locate the device in respective loaded and unloading positions, and apparatus for measuring the quantity of material delivered by the device, the apparatus comprising means to determine the position of the device with respect to a selected location in the structure at a plurality of intervals during the movement of the device, means to provide a processable position signal indicative of the determined position of the device, means to determine the load at a selected location within the structure where the load is related to the weight of the device and device contents at the intervals during the movement of the device, means to produce a processable load signal indicative of the determined load at the location, and processing means to receive the position and load signals for a plurality of interval determinations and calculate therefrom a number of weight determinatio
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: May 1, 2001
    Assignee: Harnischfeger Technology, Inc.
    Inventors: Shu-Chieh Chang, Michael J. Rikkola, Paul G. Phillips, John S. Burant, Demeng Chen