Fluid handling – Systems – Supply and exhaust
Patent
1981-03-31
1983-03-29
Michalsky, Gerald A.
Fluid handling
Systems
Supply and exhaust
137551, 13759617, 137884, 137885, 174 52R, 405302, F15B 1306
Patent
active
043780270
ABSTRACT:
A control unit/hydraulic control mechanism for controlling the hydraulic working appliances of a mine roof support unit has a control unit mounted on one side of a distributor plate, and a valve block mounted on the other side of the distributor plate. The distributor plate and the valve block constitute the hydraulic control mechanism, the valve block being constituted by a stack of pilot-operated hydraulic control valves. The control unit has a protective casing defining first and second chambers. The first chamber accomodates a plurality of electromagnetic valves. The second chamber constitutes a lead-through chamber for leading electric cables to the electromagnetic valves. The second chamber is provided with a respective socket for each of the electric cables. Each of the sockets is shaped to mate with a complementary member attached to the associated electric cable, whereby the electric cables can be connected to the control unit so as to resist tensile forces, and in such a manner that the interior of the second chamber is sealed with respect to the external atmosphere.
REFERENCES:
patent: 3215158 (1965-11-01), Bass et al.
patent: 3353068 (1967-11-01), Turk
patent: 3504704 (1970-04-01), Beckett et al.
patent: 3513876 (1970-05-01), Tarbox
patent: 3654960 (1972-04-01), Kiernan
patent: 3821880 (1974-07-01), Weirich et al.
patent: 4100937 (1978-07-01), Mallory
Rosenberg Harry
Weirich Walter
Gewerkschaft Eisenhutte Westfalia
Michalsky Gerald A.
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