Boots – shoes – and leggings
Patent
1990-09-18
1992-12-08
Ruggiero, Joseph
Boots, shoes, and leggings
37DIG1, 364180, 364193, 36442407, G06F 1520
Patent
active
051703424
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method and apparatus for automating a routine operation of an electronically controlled hydraulic-powered machine, the apparatus being mounted on the hydraulic-powered machine such as construction machines and the like to have the hydraulic-powered machine respectively perform its simple routine operation automatically, which routine operation is frequently required to be performed in practice.
DESCRIPTION OF THE PRIOR ART
As for a control system of a hydraulic-powered machine such as construction machines and the like comprising power shovels and wheel-type loaders, further advances in electronic engineering and hydraulic engineering in recent years make it possible to replace a conventional mechanical control system of the hydraulic-powered machine with an electronically controlled system in which a control leverl 1 of the machine is moved by an operator of the machine in operation to the extent of a desired amount as shown in FIG. 1, so that the desired amount of motion of the control lever 1 is converted into an electric signal on the basis of which the hydraulic-powered machine is controlled. Namely, as shown in FIG. 1, in an electric control unit 2, the desired amount of motion of the control lever 1 operated by the operated is converted into the electric signal which is issued from the electric control unit 2 to an electronic controller 3. Then, in the electronic controller 3, the electric signal is converted into another signal issued to an electronically controlled hydraulic valve 4. Consequently, in response to the another signal, the electronically controlled hydraulic valve 4 permits a hydraulic pump 6 to supply a predetermined amount of pressure oil to a hydraulic actuator 5 through passages 7a or 7b, which amount of pressure oil corresponds to another signal.
Such a conventional electronically controlled system having the above construction permits the operator of the hydraulic-powered machine to conduct a delicate operation of the machine, which delicate operation can not be performed hitherto.
As described above, the conventional electronically controlled system shown in FIG. 1 permits the operator of the hydraulic-powered machine to perform, a delicate operation. However, in this conventional system, operation of the hydraulic-powered machine is manually conducted by the operator of the machine through the manually controlled lever 1. Particularly, for example, in a digging operation of a wheel-type hydraulic-powered loader H, as shown in FIG. 2A, first of all, the loader is moved forward in a condition in which a bucket B of the loader H is oriented toward a pile of earth E, so that the bucket B penetrates the pile of earth E. After that, the bucket B is gradually moved to have its opening oriented upward as the loader H moves further forward. Namely, the bucket B is filled with earth E by upward and forward motion. Then, as shown in FIG. 2B, the loader H travel to a desired place. When the loader H reaches the desired place, the opening of the bucket B is oriented downward to unload the earth E onto the place as shown in FIG. 2C. After that, the loader H is moved slightly rearward to complete its digging operation.
As described above, in the conventional earth digging operation conducted by the wheel-type hydraulic-powered loader H, several tens of repetitive routine operations, i.e., repetitive earth digging and unloading operations are required. Therefore, the operator of the loader H is overburdened with such a tiresome repetition of the same operations.
SUMMARY OF THE INVENTION
Under such circumstances, the present invention was made. Consequently, it is an object of the present invention to provide a method and apparatus for automating a routine operation of an electronically controlled hydraulic-powered machine, the apparatus being mounted on the hydraulic-powered machine to have the hydraulic-powered machine perform repetitively its simple routine operation by automation in safety, which routine operation is frequent
REFERENCES:
patent: 4627013 (1986-12-01), Ichiyama et al.
patent: 4699239 (1987-10-01), Ishino et al.
patent: 4715012 (1987-12-01), Mueller, Jr.
patent: 4742468 (1988-05-01), Ohashi et al.
patent: 4949263 (1990-08-01), Nrca
Maeda Shinji
Nakamura Kentaro
Note Kiyoshi
Yamashita Koichi
Kabushiki Kaisha Komatsu Seisakusho
Ruggiero Joseph
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