Harnischfeger Corporation

Harnischfeger Technologies, Inc.

Shu-Chieh Chang

Michael J Rikkola

John S Burant

David M Lokhorst

Angela R Halwas

Paul G Phillips

Demeng Chen

Francis G Wickert

Bryan D Roy

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 determinations of the device and device contents from the interval determinations made during the movement, to select a sample of less than all of the weight determinations based upon the dynamic influences on the machine when the signals are processed, and to average the sample of selected weight determinations to provide a final weight determination of the device and device contents.

Load weighing system for a heavy machinery

A new method for controlling movement of a digging dipper includes providing an earthmoving machine with two drive systems for moving the dipper along two respective paths. Also provided is a control apparatus having a reference axis and a knob mounted for movement between a first, repose position and a maximum position spaced from the repose position by a maximum displacement dimension. The knob is displaced along a control axis to a second position which is spaced from the repose position by an actual displacement dimension less than the maximum displacement dimension. The drive systems are energized and the dipper is powered along a digging axis generally parallel to the control axis. A new apparatus for controlling movement of the dipper has a single control knob having a repose position and also has first and second motion transducers mechanically coupled to the knob. In a Cartesian coordinate system, the repose position is at the origin, the first transducer provides a first output signal when the knob is displaced along the 'X' axis and the second transducer provides a second output signal when the knob is deflected from the repose position along the 'Z' axis.

Method and system for controlling movement of a digging dipper

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Greenfield, WI, United States of America

Shu-Chieh Chang