Automatic steering for construction machines

Details Automatic steering for construction machines Automatic steering for construction machines

1977-04-25

1979-02-20

Pekar, John A.

Motor vehicles

Special driving device

Portable track

37DIG20, 172 3, 404 84, B62D 1120

Patent

active

041401930

ABSTRACT:
Automatic control means for the coordinated steering of front and rear pairs of individually steerable ground engagement means supporting a construction machine are disclosed wherein signals from front and rear steering sensors following a grade reference extending along the path of travel are fed to a panel readout/amplifier unit which sends error signals to a servo-valve system and feedback signals from potentiometers are produced to coordinate the degree of steer and the magnitude thereof with that of the sensed signals. In one embodiment the control means coordinate the parallel steering of the pairs of ground engagement means of a machine in the paving mode through the use of individual steering rams for each of the ground engagement means without the necessity of using steering linkages.

REFERENCES:
patent: 3792745 (1974-02-01), Files
patent: 4029165 (1977-06-01), Miller et al.
patent: 4041623 (1977-08-01), Miller et al.

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