Shearer loader for underground mining comprising a spray system

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Cleansing fluid passage

Reexamination Certificate

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Details

C299S081100, C299S043000

Reexamination Certificate

active

07954904

ABSTRACT:
A shearer loader for underground mining, the shear loader comprising a shearer loader body, at least one cutting drum fastened to a supporting arm joined to the loader body, a first drive motor for moving the shearer loader and a second drive motor for moving the cutting drums, a cooling water circuit for cooling the first and second drive motors, the cooling water circuit including an inlet and a return line, a spray system including at least one spray water circuit, the spray system including a feed line fluidly connecting a common water connection to the cutting drums, the spray system further including a valve in the feed line for switching the spray water circuits on and off, a control valve connected between the feed line of the spray water circuit and the return line of the cooling water circuit, the control valve allowing selective flow from the cooling water circuit to be directed to the cutting drums.

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English translation of the International Preliminary Report on Patentability and Written Opinion dated Mar. 17, 2009 of International Appln. No. PCT/EP2007/007287, filed Aug. 17, 2007.

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