System and equipment for operating self-advancing supports

Details System and equipment for operating self-advancing supports System and equipment for operating self-advancing supports

1976-12-15

1978-05-30

Shapiro, Jacob

91 1, E21C 3524, F01B 2526

Patent

active

040916278

ABSTRACT:
System and equipment for operating self-advancing supports comprising electromagnetic valves being provided in each of the self-advancing supports which support the roof of a long-walled pit face in a coal mine and rendering operative the hydraulic cylinders for causing the roof plates of the supports to be lowered and lifted and for causing the supports to move toward the pit face, and operating devices being connected to the electromagnetic valves through a cable wherein the electromagnetic valves can be opened and closed through the operating devices from a desired position remote from the supports so as to operate the supports.

REFERENCES:
patent: 3207041 (1965-09-01), Philips
patent: 3259024 (1966-05-01), Kibble et al.
patent: 3495499 (1970-02-01), Ward
patent: 3643445 (1972-02-01), Schmidt

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