Conveyor control system for a self-loading scraper

Details Conveyor control system for a self-loading scraper Conveyor control system for a self-loading scraper

1978-01-26

1979-10-30

Eickholt, E. H.

Excavating

Peat excavators

1376256, 280489, 267 65D, B60P 142

Patent

active

RE0301280

ABSTRACT:
A control system for the hydraulically powered conveyor, such as an auger, of a self-loading [auger] scraper that has a hydraulic cushion hitch which is locked out when the scraper is loading. A multi-position manually controlled pilot selector valve which is used to lock out the cushion hitch also initiates operation of the auger. The control system includes a pilot operated, normally open auger control valve through which flow of a signal line for a normally open unloading relief valve goes to drain. Moving the pilot selector valve from a first to a second position pressurizes the pilot line to close the auger control valve and thus isolate the signal line from drain, closing the unloading relief valve to isolate a pump for the auger motor from drain and cause it to power the motor.

REFERENCES:
patent: 3311389 (1967-03-01), Barton et al.
patent: 3321216 (1967-05-01), Carter
patent: 3469861 (1969-09-01), Schexnayder
patent: 3568718 (1971-03-01), Wilke et al.
patent: 3618984 (1971-11-01), Cook et al.
patent: 3766944 (1973-10-01), Distler
patent: 3859741 (1975-01-01), Reinhardt
patent: 3863367 (1975-02-01), Gee et al.
patent: 3865135 (1975-02-01), McWilliams et al.

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