Automatic control systems for the working tool of a civil machin

Details Automatic control systems for the working tool of a civil machin Automatic control systems for the working tool of a civil machin

1977-08-29

1979-06-05

Stouffer, Richard T.

Earth working

Automatic power control

Land leveller type

172 7, 172 12, A01B 63111

Patent

active

041571185

ABSTRACT:
In a civil machine comprising a working tool provided on a vehicle with a travelling mechanism and a drive therefor, an automatic control system comprises a stroke detector for detecting the amount of stroke of a lifting cylinder operating to move the working tool up and down, an inclination angle detector for detecting the inclination angle of the vehicle, an arithmetic unit for obtaining data representative of the height of the working tool from the detection signals of the two detectors, and a control for operating the lifting cylinder by using the data to control the position of the working tool with high accuracy.

REFERENCES:
patent: 2902979 (1959-09-01), Gurries et al.
patent: 3750757 (1973-08-01), Saetti
patent: 3831683 (1974-08-01), Ikeda et al.
patent: 4024796 (1977-05-01), Theobald
patent: 4031964 (1977-06-01), Takahashi et al.
patent: 4044838 (1977-08-01), Wooldridge
patent: 4045893 (1977-09-01), Feinzilber et al.
patent: 4064945 (1977-12-01), Haney

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