UNDERGROUND MINING TUNNELING EQUIPMENT NAMELY

Brand	Owner (click to sort)	Address	Description
JARCO	C-I-L INC.	90 SHEPPARD AVENUE EAST WILLOWDALE, ONTARIO Canada	Underground Mining and Tunneling Equipment-Namely, Diesel and Electric Scoop-Mounted Low-Profile Load-Haul-Dump Machines;
JARCOSCOOP	C-I-L INC.	90 SHEPPARD AVENUE EAST WILLOWDALE, ONTARIO Canada	Underground Mining and Tunneling Equipment-Namely, Diesel and Electric Scoop-Mounted Low-Profile Load-Haul-Dump Machines;
JARVIS CLARK	Jarvis Clark Company Limited	4445 Fairview St. Burlington, Ontario L7L 2A4 Canada	Underground Mining and Tunneling Equipment-Namely, Mechanized Explosive Loaders, Wheel-Mounted and Track-Mounted Single and Multi-Boom Drilling Rigs, Diesel and Electric Scoop-Mounted Low-Profile Load-Haul-Dump Machines, Hydraulic Rock Breakers and Drifters, and Scaling and Bolting Rigs;Underground and Mining Tunneling Equipment-Namely, Low-Profile Diesel Locomotives, Low-Profile Dump Trucks and Low-Profile Utility Trucks;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

The invention relates to a mining electromagnet for the switching of hydraulic pilot valves or main control valves used in underground mining operations, with a coil which can be connected to an intrinsically-safe power unit, with an armature which can be displaced by application of current to the coil and with an electronic control device 20, by means of which the current which is conducted to the coil can be set during the drawing-in phase of the armature to an excitation current, and in its holding phase can be set to a holding current which is lower than the excitation current. According to the invention, a storage means 24, 25 is allocated to the mining electromagnet 2, 3, said storage means being capable of being charged with the power unit voltage of the power unit 23, and switched in series with the power unit by the initiation of a switching process for the electromagnets, and which, by means of its discharge during the duration of the drawing-in phase, causes an increase in the voltage imposed at the coil of the electromagnet which is to be switched. In preferred embodiments of the invention, twice as many electromagnets can be switched in the same time and supplied with one common power unit.