Earth working – Automatic power control – Land leveller type
Patent
1977-09-28
1979-09-04
Hershkovitz, Abraham
Earth working
Automatic power control
Land leveller type
172803, 91453, 91459, 91461, 91512, 91529, E02F 376
Patent
active
041665066
ABSTRACT:
A controlling apparatus for bulldozer blade in which the control is carried out automatically or manually.
The apparatus comprises an electromagnetic valve for controlling a cylinder of the bulldozer blade, a switch for changing the control of the bulldozer blade automatically or manually, a safety relay connected with said switch, the safety relay being adapted to be actuated only when the switch is maintained in a manual operating position, and a load reading relay adapted to be actuated by a signal fed from a load detecting circuit for supplying a signal to one of the solenoids of the electromagnetic valve.
REFERENCES:
patent: 2778130 (1957-01-01), Gurries
patent: 3009271 (1961-11-01), Kuchne
patent: 3831683 (1974-08-01), Ikeda
patent: 3842714 (1974-10-01), Coleman
patent: 4017110 (1977-04-01), Pease
patent: 4031964 (1977-06-01), Takahashi
Chagawa Chikashi
Tezuka Iwao
Hershkovitz Abraham
Kabushiki Kaisha Komatsu Seisakusho
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