Excavating – Scoop or excavating and transporting container – Dipper-type
Patent
1994-03-23
1995-10-31
Reese, Randolph A.
Excavating
Scoop or excavating and transporting container
Dipper-type
36442407, 414699, E02F 332
Patent
active
054618037
ABSTRACT:
A control system for automatically controlling a work implement of an excavating machine through a machine work cycle is disclosed. The work implement includes a boom, stick and bucket, each being controllably actuated by at least one respective hydraulic cylinder. A position sensor produces respective position signals in response to the respective position of the boom, stick and bucket. A pressure sensor produces respective pressure signals in response to the associated hydraulic pressures associated with the boom, stick, and bucket hydraulic cylinders. A microprocessor receives the position and pressure signals, and produces a command signal. An electrohydraulic system receives the command signal and controllably actuates predetermined ones of the hydraulic cylinders to perform the work cycle. The microprocessor determines the external force applied to the bucket and the angle of the bucket force, compares the angle of the bucket force to a predetermined value, and responsively determines when a digging portion of the work cycle is complete.
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Batson Victor
Bluth Thomas J.
Caterpillar Inc.
Masterson David M.
Reese Randolph A.
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